landis & gyr dialog - zxd120ap active energy meter … & gyr dialog - zxd120ap active energy...

Landis & Gyr Dialog - ZxD120APActive energy meter for direct connection

User manual

Landis & Gyr DialogZMD120APZFD120AP

H 71 0200 0103- en

H 71 0200 0103 - en September 2001

Revision history

Information about document indexes, revision and corrections carried out respectively

Index Date Name/phone Comments- 12.09.2001 E. Ineichen, 3016 Adaptation from version ..AM to version ..AP

© 2001 Siemens Metering Ltd. All rights reserved

User manual ZFD120AP / ZMD120AP basic versionIntroduction

Siemens Metering LtdH 71 0200 0103 - en September 2001

0-3

Introduction

Range of validity The present user manual applies to the basic version of the meters:• ZMD120AP (for three-phase four-wire networks)

and• ZFD120AP (for three-phase three-wire networks)

Explanations without specific type details apply to both types.

Purpose The user manual contains all the information required for application of themeters for the intended purpose. This includes:• Provision of knowledge concerning characteristics, construction and

function of the meters• Information about possible dangers, their consequences and measures

to prevent any danger• Details concerning the performance of all work throughout the service

life of the meters (parametrizing, installation, commissioning, operation,maintenance, shutting down and disposal)

Target group The contents of this user manual are intended for technically qualified per-sonnel of energy supply companies responsible for the system planning,installation and commissioning, operation, maintenance, decommissioningand disposal of the meters.

Conditions The user of this manual has received instruction in basic electrical princi-ples, in particular the various principal types of circuit for energy measure-ment.

Subdivision This user manual is divided in a logical manner suitable for learning andapplication, i.e. the individual chapters follow the sequence of informationprobably required during the various phases of the service life of the me-ters. This provides the following structure:• Chapter 1 Description of unit• Chapter 2 Safety• Chapter 3 Construction and function• Chapter 4 Control elements and displays• Chapter 5 Parameter setting• Chapter 6 Installation and commissioning• Chapter 7 Data readout• Chapter 8 Maintenance and service• Chapter 9 Measures in event of faults• Chapter 10 Decommissioning, disposal

User manual ZFD120AP / ZMD120AP basic versionTable of contents

0-4 Siemens Metering LtdH 71 0200 0103 - en September 2001

Table of contents

1 Description of unit ................................................................. 1-11.1 Review ..................................................................................... 1-11.1.1 General view ............................................................................ 1-11.1.2 Purpose of use ........................................................................ 1-21.1.3 Field of application ................................................................... 1-21.1.4 Type designation ..................................................................... 1-21.1.5 Review of main characteristics ................................................. 1-31.2 Technical data ......................................................................... 1-41.2.1 Voltage values ......................................................................... 1-41.2.2 Current values ......................................................................... 1-41.2.3 Starting values ......................................................................... 1-41.2.4 Frequency values .................................................................... 1-51.2.5 Power consumption ................................................................. 1-51.2.6 Measuring accuracy ................................................................. 1-51.2.7 Output values .......................................................................... 1-61.2.8 Control inputs .......................................................................... 1-71.2.9 Serial interface ......................................................................... 1-71.2.10 Voltage behaviour .................................................................... 1-81.2.11 External influences .................................................................. 1-81.2.12 Weight and dimensions ......................................................... 1-101.2.13 Connections ........................................................................... 1-111.3 Connection diagrams ............................................................. 1-131.3.1 Meters for three-phase three-wire networks ........................... 1-131.3.2 Meters for three-phase four-wire networks ............................. 1-132 Safety ...................................................................................... 2-12.1 Safety information .................................................................... 2-12.2 Responsibilities ........................................................................ 2-12.3 Safety regulations .................................................................... 2-23 Construction and function .................................................... 3-13.1 Meter construction ................................................................... 3-13.2 Measuring principle .................................................................. 3-33.2.1 Overview ................................................................................. 3-33.2.2 Signal generation ..................................................................... 3-43.2.3 Signal processing .................................................................... 3-54 Control elements and displays ............................................. 4-14.1 Control elements ..................................................................... 4-14.2 Liquid crystal display ................................................................ 4-14.2.1 Basic layout ............................................................................. 4-14.2.2 Operating display ..................................................................... 4-34.3 Test diode ................................................................................ 4-44.4 Pulse output r53 ...................................................................... 4-45 Parameter setting .................................................................. 5-15.1 Values selectable .................................................................... 5-16 Installation and commissioning ........................................... 6-16.1 Introduction .............................................................................. 6-16.2 Material and tools required ...................................................... 6-1



0-5

6.3 Mounting the meter .................................................................. 6-26.4 Connecting meter .................................................................... 6-36.5 Check of connections .............................................................. 6-56.6 Commissioning and functional check ....................................... 6-67 Data readout ........................................................................... 7-17.1 Data readout via optical interface ............................................. 7-17.2 CS interface ............................................................................. 7-38 Maintenance and service ...................................................... 8-18.1 Meter check ............................................................................. 8-18.2 Meter testing ............................................................................ 8-18.2.1 Test mode ............................................................................... 8-18.2.2 Measuring times ...................................................................... 8-28.2.3 Test diode ................................................................................ 8-38.2.4 Installation of meters on a testing device ................................. 8-38.2.5 Creep test ................................................................................ 8-48.2.6 Starting test ............................................................................. 8-48.3 Input of formatted commands .................................................. 8-59 Measures in event of faults ................................................... 9-19.1 Error messages ....................................................................... 9-19.1.1 Structure of an error message ................................................. 9-19.1.2 Error groups ............................................................................. 9-29.2 Operating faults ....................................................................... 9-59.3 Disconnecting meters .............................................................. 9-59.4 Repairing meters ..................................................................... 9-610 Decommissioning, disposal ............................................... 10-1

User manual ZFD120AP / ZMD120AP basic versionDescription of unit


1-1

1 Description of unit

1.1 Review

1.1.1 General view

View of meter:

Fig. 1.1 General view of meter <neues Foto>

Case The meter case is made of antistatic plastic with glass-fibre reinforcedlower section and terminal block. The upper part of the case is providedwith a transparent plastic viewing window to show the dial of the meter.The terminal cover is available in two different versions (short and long) toensure the required space for the connections.The contacts to supply an extension installed later are fitted under the addi-tional cover in the upper part of the case.

Face Plate All relevant data for the meter are provided on the face plate inscribed incountry or Utility specific form. Openings ensure an uninterrupted view ofthe liquid crystal display, the test diode and optical interface for automaticreadout of meter data.



1.1.2 Purpose of use

The ZMD120AP or ZFD120AP meters record active energy consumption inthree-phase four-wire or three-phase three-wire networks. For this purposethey are directly installed in the supply line by the energy supply companyand are read regularly for energy charging purposes.Any other application of these meters is not considered use for the intendedpurpose.

1.1.3 Field of application

Basic version The meters can be used for currents up to 100 A. They form the basic ver-sion of this meter series fitted with energy registers for one to four tariffs, aserial interface with optical input/output for data recording and a pulse out-put. Their simple functions predestine these meters for applications bysmaller consumers, particularly for households.

Extensions With various extensions the basic version can be supplemented with addi-tional functions. Possible extensions:• Time switch or ripple control receiver for tariff control• RS232 interface for remote scanning of meter data• Multiple energy tariffs• Demand tariffs (maximum demand for medium consumers)• Pulse inputs• Outputs for pulses and/or control signalsExtensions can also be added later on to the basic version without requiringthe meter to be dismantled or affecting its calibration status. More completedetails about the individual extensions can be found in the associatedseparate operating instructions.

1.1.4 Type designation

Three-phase three-wire network (Aron circuit)Three-phase four-wire network

Types of circuit

Direct connection (IEC Class 2)Connection versions

with single tariff registerwith multiple tariff register

Tariff functions

ZMD 120 t CS

Interface / Pulse transmissionInterface according to IEC 62053-31 for remote readoutTransistor output, S0 according to IEC 62053-31,pulse length ti variable

Measuring versionsAP

AP

ZFDZMD

120

Active energy meter, modular extendable (plug and play)

et

CSr53

This user manual does not normally specify the codes for the tariff functionsand pulse transmission in the type designation, except when this isimportant for better understanding.



1-3

1.1.5 Review of main characteristics

The meters have the following basic characteristics:• Recording of active energy in one or more tariffs• External tariff control via tariff terminals• Display of data with a liquid crystal display (LCD)• Measuring elements in proven DFS technology (Direct Field Sensor

based on the Hall effect) with excellent measuring characteristics, in-cluding flat load curve, high stability and good protection against inter-ference

• Compliance with accuracy class 2 according to IEC 61036• Flexible measuring system through definition of different variables by

software (single parameterisation by manufacturer)• Correct measurement even with failure of individual phases or when

used in two or single-phase networks• Wide range of measurement from starting current to maximum current• Serial interface with optical input/output

− for direct readout of meter data− for communication with an extension

• CS interface for remote scanning of data orPulse output for transmission of constant pulses

• Installation aids− Indication of presence of phase voltages, rotating field and direction

of energy− Power indicator

• Storage of additional information such as operating times (readable viaoptical interface or, if present, the CS interface).



1.2 Technical data

1.2.1 Voltage values

Rated voltage Un• ZMD120AP

− Nominal value .............................................................. 3 x 230/400 V− Permissible range ............................. 3 x 220/380 V to 3 x 240/415 V− Note: This meter can also be operated with only one or two phases

without loss of accuracy.

• ZFD120AP− Nominal value .................................................................... 3 x 230 V− Permissible range ........................................... 3 x 220 V to 3 x 240 V− Note: this meter can also be operated with only two phases without

loss of accuracy.

Voltage range ................................................................... 0.8 to 1.15 x Un

1.2.2 Current values

Basic current Ib ............................................ selectable: 5, 10, 20 or 40 A

Maximum current Imax ................................... selectable: 60, 80 or 100 A

Starting current• according to IEC ....................................................................... 0.5 % Ib• typical ........................................................................... approx. 0.3 % Ib

Note: The meter uses the starting power, not the starting current, to deter-mine the starting limit.

Maximum measuring range ........................... approx. 15 mA up to 100 A

Loading capacity• Measurements .............................................................................. 100 A• Thermal ........................................................................................ 120 A• Short-circuit ≤ 10 ms ................................................................. 10'000 A

1.2.3 Starting values

Typical starting power• related to basic current Ib ................. 5 10 20 40 A• M circuit ................................ approx. 3.5 7 15 30 W• F circuit ................................. approx. 6 12 25 50 WThe meter in the M circuit measures as soon as a phase reaches thespecified starting power. For the meters in the F circuit the power in allphases must reach the specified value.



1-5

1.2.4 Frequency values

Rated frequency fn ............................................... selectable: 50 or 60 Hz

Frequency range ........................ see chapter 1.2.6 "Measuring accuracy"

1.2.5 Power consumption

Power consumption in voltage path• Active energy at Un (typical) ......................................................... 0.5 W• Apparent energy at Un (typical) ................................................... 2.5 VA

Power consumption in current path• Apparent energy at 10 A (typical) ............................................... 0.03 VA

1.2.6 Measuring accuracy

Accuracy• Accuracy class to IEC 61036 ...................................................... Class 2• Absolute accuracy (with universal loading and cosϕ=1) ............. ± 2.0 %

Load dependence with universal loading ..................... +0.9 % to -0.3 %

0.1 0.5 1 2 5 10 20 50 100 A

+ 1 %

0 %

- 1 %

- 2 %

+ 2 %

Fig. 1.2 Typical load curve with universal loading

Load dependence with single-phase loading ............... +1.0 % to -0.4 %

0.1 0.5 1 2 5 10 20 50 100 A

0 %

- 1 %

- 2 %

+ 1 %

+ 2 %

Fig. 1.3 Typical load curve with single-phase loading



Effect of voltage ........................................................................... ± 0.3 %

+ 1 %

0 %

- 1 %

80 90 100 % Un 110 120

Fig. 1.4 Effect of voltage on measuring accuracy (typical)

Effect of frequency ....................................................................... ± 0.2 %

+ 1 %

0 %

- 1 %

90 95 100 % Un 105 110

Fig. 1.5 Effect of frequency on measuring accuracy (typical)

1.2.7 Output values

Display• Type ............................................................... LCD liquid crystal display• Digit size ........................................................................................ 7 mm• Number of positions ..................................................................... up to 8

Meter constant R• Selectable: ...................................... 500, 1000, 5000 or 10000 imp/kWh

Test output• Type .................................................................................. Infrared LED• Pulse frequency (dependent on meter constant R and measured value)

− at Un and 10 A ............................................ approx. 1, 2, 10 or 20 Hz• Pulse length........................................................................ approx. 2 ms

CS interface• Type .............................................. serial, bi-directional current interface• Standard ............................................................ IEC 61107 / DIN 66258• Operating conditions

– Rated voltage ....................................................................... 24 V DC− Max. voltage ......................................................................... 30 V DC– Transmitter current Condition "On" ..... min. 11, typ. 20, max. 30 mA

Condition "Off" .............................. max. 2.5 mA– Receiver current Condition "On" ...... min. 9, typ. 20, max. 30 mA

Condition "Off" ................................. max. 3 mA– Max. baud ......................................................................... 4800 Baud– Max conductor length depending on environment and connecting cable– Insulation resistance to meter ..................................................... 4 kV



1-7

Pulse output r53• Type .................................................................................... S0 interface• Standard ............................................................ IEC 61393 / DIN 43864• Values

− selectable: .............................................. 1, 2, 3.33, 5 or 6.66 Wh/imp− resp. pulse constant ................. 1000, 500, 300, 200 or 150 imp/kWh

• Operating conditions− Supply voltage (nominal value) ............................................ 24 V DC− Maximum supply voltage ...................................................... 50 V DC− Current ..................................................................... 10 to 20 mA DC− Pulse length ............................................ selectable: 20, 40 or 80 ms− Maximum line length .............................................................. 1000 m

NOTE The pulse output r53 is only conditionally suitable for testing the meter(e.g. no measurement of load curve) owing to its special method of opera-tion (refer also to 4.4).

On status

Off statust T <_ 5 ms t Tt On t Off> 30 ms_ > 30 ms_

0.9 i

0.5 i

0.1 i

Fig. 1.6 Pulse shape according to DIN 43 864

1.2.8 Control inputs

Tariff control• Voltage values

− Control voltage Ut .................................................... 220 up to 240 V− Permissible range ................................................. 0.8 up to 1.15 x Ut

• Current input........................................................ < 2 mA ohmic at 230 V

1.2.9 Serial interface

Optical interface• Type .......................................................... serial, bi-directional interface• Standard ................................................................................ IEC 61107• Application

− Data readout according to IEC 61107 (all data)− Data readout according to DLMS (single data values)− Transmission of formatted commands to the meter− Communication with extensions



1.2.10 Voltage behaviour

Voltage interruption• Blocking of inputs and outputs ............................................... immediate• Standby operation ......................................................................... for 1 s• Data storage .............................................................................. after 1 s• Disconnection ............................................................ after approx. 2.5 s

Un

0tafter 1 s > after about 2,5 s >

Inputs and outputslockedTariff section on stand by operation

Data savedMeter disconnected

Fig. 1.7 Behaviour in event of voltage failure

Restoration of voltage• Ready for service (depending on duration of failure) .......... after 1 to 5 s*• Recognition of energy direction and phase voltage ........... after 1 to 3 s*

* operated with 3 phases

Un

0 tmax 3 s > max 5 s >

Detection ofenergy direction and phase voltages

All functionsavailable

Fig. 1.8 Behaviour when voltage restored

1.2.11 External influences

Temperature range• Operation ...................................................................... -40 °C to +60 °C• Storage ......................................................................... -40 °C to +70 °C

Temperature coefficient• Range .................................................................... from -20°C to +55°C• Typical mean value ........................................................... ± 0.0 % per K• With cosϕ=1 (from 0.1 Ib to Imax) ................................... ± 0.02 % per K• With cosϕ=0.5 (from 0.2 Ib to Imax) ................................ ± 0.03 % per K



1-9

Error[%]

+1.0

+0.5

0

TemperatureºC

-0.5

-1.0

-40 -20 0 +20 +40 +60 [

-1.5

+80 +100 ]

Maximum

Medium value

required by IEC:0.05 % / K

over 20 K between-25 and + 55 ºC

Minimum

Fig. 1.9 Temperature behaviour

Insulation strength ............................................... 4 kV at 50 Hz for 1 min.

Impulse voltage strength• Impulse voltage ............................................................................... 8 kV• Rise time of impulse voltage ......................................................... 1.2 µs• Decay time of impulse voltage ....................................................... 50 µs• Source resistance of generator ....................................................... 50 Ω

Protection class ........................................................... IP 52 to IEC 60529

Electromagnetic compatibility• Electrostatic discharges ............................................... to IEC 61000-4-2

− Contact discharges ..................................................................... 8 kV• Electromagnetic high frequency fields .......................... to IEC 61000-4-3

− 27 MHz to 500 MHz .................................................... at least 10 V/m− 100 kHz to 1 GHz ........................................................ typical 30 V/m

• Line transients ............................................................. to IEC 61000-4-4− for current and voltage circuits ................................................... 2 kV− for auxiliary circuits > 40 V ......................................................... 1 kV

• Radio interference suppression ...................... to IEC/CISPR 22 Class B



ZxD120AP

IEC

Field strength

[V/m]

100

30

10

0.1 1 10 100 1000 [MHz]

Frequency

required by IEC: 10 V per m, from20 to 500 MHz

satisfied by ZxD120AP: 30 V per m, from0.1 to 2000 MHz

Fig. 1.10 Electromagnetic compatibility

1.2.12 Weight and dimensions

Weight ................................................................................. approx. 1.0 kg

External dimensions ............................................ comply with DIN 43857• Width ......................................................................................... 177 mm• Height (with short terminal cover) ............................................... 213 mm• Height (with standard terminal cover) ......................................... 275 mm• Depth ........................................................................................... 52 mm

Suspension triangle• Height (suspension eyelet open) ................................................ 180 mm• Height (suspension eyelet covered) ........................................... 162 mm• Width ......................................................................................... 150 mm

Terminal cover• Short ................................................................................. no free space• Standard .................................................................... 60 mm free space• To DIN (black) ............................................................ 60 mm free space



1-11

6.2

60

150

177

2616

2 180

51.9

275

51.9

Fig. 1.11 Meter dimensions (standard terminal cover)

1.2.13 Connections

Phase connections• Type ...................................................................... screw type terminals• Diameter ..................................................................................... 8.5 mm• Maximum conductor cross-section

− cable ...................................................................................... 35 mm2

− strand..................................................................................... 25 mm2

• Minimum conductor cross-section ................................................ 4 mm2

• Screw dimensions ...................................................................... M6 x 14− head diameter ............................................................... max. 6.6 mm− cross-slot ........................................ type Z, size 2, to ISO-4757-1983− slot ...................................................................... 0.8 +0.2/+0.06 mm

• Tightening torque ................................................................... max. 3 Nm• Adaptation to plug adapters for Geyer terminals, ODU contacts, Amphe-

nol Tuchel plugs is ensured.



Other connections• Type ................................................. screwless spring-loaded terminals• Maximum current of voltage outputs ................................................. 1 A• Maximum voltage of control inputs ................................................ 275 V• Maximum voltage r53 (observe polarity) ................................... 50 V DC

L1 L2 L3 N

Phase connections

Voltage outputs

U1 U2 U3 N G E1/E2

Control inputs CS interface or Transmission contactconstant pulses

CS or r53

5.658.5

14.5 14.5 14.5 14.5 14.5 14.5 1219.75

15.3

20.2

13.4

4019 16 16 1613 13 13 13.5

Spacings of terminal openingsSpacings ofterminal stampingsfor smaller conductors

Fig. 1.12 Normal terminal layout and dimensions

5.659.5

14.5 14.5 14.5 14.5 14.5 14.5 1219.75

15.8

19.7

13.4

40

19 16 16 1613 13 13 13.5

Spacings of terminal holes

Spacings of terminalembossing forsmaller conductors

Fig. 1.13 Terminal layout and dimensions with terminal opening diameterof 9.5 mm



1-13

1.3 Connection diagrams

NOTE The following connection diagrams should be considered examples. Theconnection diagram imprinted on the dial or placed in the terminal cover isalways binding.

1.3.1 Meters for three-phase three-wire networks

xx

x

r53

+ -

L1L2L3

20 21

S0

1

2 2

4

5

7 93

5

6

8 5

Fig. 1.14 Connection diagram ZFD120APer53

1.3.2 Meters for three-phase four-wire networks

xx

xx

xx

r53

+ -

L1L2L3N

20 21

S0

1

2 2

4

5

7 9 10

11

123

5

6

8

Fig. 1.15 Connection diagram ZMD120APer53



xx

xx

xx

+ -

L1L2L3N 220 - 240 V

20 211

2 2

4

5

7 9 10

11

123

5

6

815 15 13 33

G E1 E2

CS

Fig. 1.16 Connection diagram ZMD120APtCS for three or four tariffs

xx

xx

xx

L1L2L3N 220 - 240 V

1

2 2

4

5

7 9 10

11

123

5

6

815 15 13 13

G E1 E1+ -

32 33

CS

Fig. 1.17 Connection diagram ZMD120APtCS for two tariffs

User manual ZFD120AP / ZMD120AP basic versionSafety


2-1

2 Safety

2.1 Safety information

Attention is drawn as follows in the individual chapters of this user manualwith classified word symbols and pictographs to the relevant danger level,i.e. the severity and probability of any danger:

WARNING For a possibly dangerous situation, which could result in severe physicalinjury or fatality.

CAUTION For a possibly dangerous situation, which could result in minor physicalinjury or material damage.

NOTE For a possibly dangerous situation, in which the product or an article in itsenvironment could be damaged and for general details and other usefulinformation to simplify the work.

In addition to the danger level, all safety information also describes the typeand source of the danger, its possible consequences and measures tocounteract the danger.

2.2 Responsibilities

The owner of the meters – normally the power supply company – is re-sponsible that all persons engaged on work with meters:1. Have read and understood the relevant sections of the user manual.2. Are sufficiently qualified for the work to be performed.3. Strictly observe the safety regulations (according to section 2.3) and the

operating information in the individual chapters.

In particular, the owner of the meters bears responsibility for the protectionof persons, prevention of material damage and the training of personnel(Siemens Metering Ltd. provides training courses for this purpose on spe-cific equipment; please contact the relevant agent if interested).

User manual ZFD120AP / ZMD120AP basic versionSafety


2.3 Safety regulations

The following safety regulations must be observed at all times:• The meter connections must not be under voltage during installation or

when opening. Contact with live parts is dangerous to life. The relevantpreliminary fuses should therefore be removed and kept in a safe placeuntil the work is completed, so that other persons cannot replace themunnoticed.

• Local safety regulations must be observed. Installation of the metersmust be performed exclusively by technically qualified and suitablytrained personnel.

• The meters must be held securely during installation. They can causeinjuries if dropped.

• Meters which have fallen must not be installed, even if no damage isapparent, but must be returned for testing to the service and repair de-partment responsible (or the manufacturer). Internal damage can resultin functional disorders or short-circuits.

• The meters must on no account be cleaned with running water or withhigh pressure devices. Water penetrating can cause short-circuits.

User manual ZFD120AP / ZMD120AP basic versionConstruction and function


3-1

3 Construction and function

3.1 Meter construction

The internal construction of the meters will not be described in detail here,since they are protected by two calibration seals when delivered, followingcalibration and official certification. It is not permitted to open the metersafter delivery. Any extensions are fitted outside the calibration seals (referto separate operating instructions for the individual extensions).The figure below shows the parts of the meter visible from outside.

1

2 2

4

3 3

5

7

6

Fig. 3.1 Front view of meter

1 Lowerable suspension hanger2 Lugs for attaching an extension3 Screws for upper part of case with calibration seals4 Upper part of case5 Face plate (see Fig. 3.2 for details)6 Cover for contacts to supply an extension7 Terminal cover with screws and factory seals

A terminal block with all connecting terminals for the meter are situated un-der the terminal cover. Two factory seals in the fixing screws for the termi-nal cover prevent unauthorised access to the phase connections to preventunrecorded power consumption.



The arrangement of the various connecting terminals is shown in Fig. 1.12(section 1.2.13 "Connections"The dial is configured to the specific data of the customer. It contains allrelevant details for the meter. Openings provide a clear view of the LCDliquid crystal display, test diode and the optical interface for automaticreadout of the meter data.

kWh

0.1

0.3 1 3 10 30 100

kW

1000 imp/kWh

Low-rate tariffHigh-rate tariff

121 2

Low-rate tariffHigh-rate tariff

Energy total

Three-phase four-wire meter

Landis & Gyr Dialog

ZMD120APtCS Nr. 75 521 6473 x 230/400 V 10 (80) A 50 Hz

Kl. 2 2001

Readout

1

34

567

10

11

12

8

29

13

1

L1 L2 L32 3 4

xx

xx

xx

+ -

L1L2L3N 220 - 240 V

32 331

2 2

4

5

7 9 10

11

123

5

6

815 15 13 33

G E1 E2

CS

Fig. 3.2 Basic layout of face plate

1 Liquid crystal display (LCD)2 Displayed values3 Meter constant R4 Test diode (infrared)5 Field for certification symbol6 Symbol for double protective insulation7 Symbol for type of circuit8 Optical interface9 Measured values (tariffs)10 Meter data11 Connection diagram12 Field for ownership designation13 Equipment number as barcode

The control elements and indications are described more fully in chapter 4.



3-3

3.2 Measuring principle

NOTE The following explanations refer exclusively to the meter type ZMD120AP(with 3 sensors).The ZFD120AP is used rather rarely and differs from the ZMB120AP firstlyby the number of sensors in the measuring system and secondly by indi-vidual variations in measuring behaviour. These are not specially describedhere.

3.2.1 Overview

The measuring principle of the meters is first briefly described by means ofthe general block diagram. Individual functional blocks are then describedin a little more detail if necessary for understanding.

Ut

L1L2L3N

Controlinputs

DFS

Mea

surin

g sy

stem

Power supply

Voltagemonitor

EEPROMmemory

Micro-processor

LCD display

Testdiode

Opticalinterface

r53: Pulse outputCS: Interface for remote readout

DFS

DFS r53orCS

+-

Fig. 3.3 Block schematic diagram for ZMD120AP

Inputs The main inputs to the meter are shown on the left.• Phase connections (L1, L2, L3) and neutral

− for the energy measurement− for the three-phase supply to the meter

• Control inputs (E1, E2) for changeover of the energy tariff

Outputs The main meter outputs are shown on the right (also input to optical inter-face).• LCD liquid crystal display for reading the measured amount of energy on

the spot (simple 8-digit display with additional information for direction ofenergy, presence of phase voltages, rotating field, power applied andpresent tariff)

• Test diode (infrared)• Optical interface for automatic data readout on site by means of suitable

communication unit (hand held terminal) and for communication with anextension

• CS interface for remote scanning of data orPulse output for transmission of constant pulses



Power supply The supply voltages for the meter electronics are obtained from the three-phase system. A voltage monitor ensures efficient operation and data re-tention in the event of a voltage failure, as well as correct starting followingrestoration of the voltage.

Measuring system Three measuring elements in the proven DFS technology (Direct FieldSensor based on the Hall effect) generate a signal proportional to thepower in each phase from the phase voltage applied and the phase currentflowing. This signal is converted to a digital signal for further processing bythe microprocessor.

Signal processing The microprocessor summates the digital signals in the individual phasesand forms energy components. It separates these components according topositive or negative sign. It then processes them in accordance with themeter constant and feeds them to the relevant tariff register, which deter-mines the tariff control. The microprocessor also controls data communi-cation with the display and serial interface as well as ensuring safe opera-tion in the event of a voltage failure.

Memory A non-volatile memory (EEPROM) contains the parameter set of the meterand secures the billing data against loss due to voltage failure.

3.2.2 Signal generation

The DFS sensor with its Hall element obtains the phase current from themagnetic field of the current loop and the phase voltage from the resistancedivider. Analogue-digital converters convert both variables to digital voltageand current signals, which are multiplied by the following digital multiplier toobtain a signal proportional to the power. This is fed to the microprocessor,which adds the signal to those of the other phases and transfers the total tothe corresponding energy register. The direction of energy is contained inthe digital signal.

DFSI

U

L1

L1

Sum

Pulsegenerator

Testdiode

Li

Phase L1A

D

AD Digital Multiplier

DFSI

U

L2

L2

Phase L2A

D


DFSI

U

L3

L3

Phase L3A

D


digitaladdition

Fig. 3.4 Signal generation in the measuring system of the ZMD120AP

The microprocessor generates the pulses for the test diode from the digitalsum corresponding to the meter constant R.



3-5

The digital signals in the individual phases are also available for processingin an extension (refer to separate operating instructions for the individualextensions).

3.2.3 Signal processing

The meters record the active energy in the 3 phases, but separated ac-cording to energy direction. For this purpose the microprocessor summatesthe digital signals of the sensors and stores the energy consumption in therelevant energy registers.If the sum of the sensor signals is negative, then and only is the measuredquantity -A produced from vectorial addition. The arrow of the energy direc-tion indication accordingly points in the opposite direction. This also appliesto summation of magnitudes for which both measured quantities +A and -Acan have values (see following example in Fig. 3.6). The parameterizingdetermines the type of summation.As an aid to installation the meter can also indicate when the sum is indeedpositive, but one or two phases are of negative energy direction. This alsoapplies to a negative sum and individual positive phases.

+/- +/- +/-

L1L2L3N

Measuringsystem +/-

+/-

+/-

-A

Summation

K K K

+/- +/- +/-

A A A

DFS

DFS

DFS

Measured quantities

Calibration

Start detection

+A

+ -

+A1 -A1

+ -

+A2 -A2

+ -

+A3 -A3

ZMD120 only

A1+A2+A3or

IA1I+IA2I+IA3I

Fig. 3.5 Signal processing diagram for meter ZMD120AP

Calibration With a calibration function the microprocessor first assesses the signal fromthe individual sensors on the basis of their deviations. These are deter-mined and stored during the final testing of the meter.

Start detection The microprocessor then compares the power present with the minimumstarting power specified. The signals are only passed on for summationwhen the minimum starting power is exceeded.

Summation Summation can take place in two ways:

• vectorial, i.e. negative values are subtracted from positive

• by magnitude, i.e.+A only includes the positive components +A1, +A2, +A3-A only includes the negative components -A1, -A2, -A3



-A

Summation

+/- +/- +/-

A1 A2 A3

Measured quantities

Start detection

+A

A1+A2+A3+ -

Example: Sum with negative phase

A1A2A3

+AA1 A2

A3

Fig. 3.6 Vectorial summation of phases in the ZMD120AP

As in previous meters (and also the Ferraris meters) the meter adds thevalues in the individual phases together with the sign. If the signs are dif-ferent (energy directions) the sum +A corresponds to the difference of thepositive (+A1, +A2) and negative (-A3) values as shown in the exampleabove.

+A = I+A1I+I+A2I+I+A3I-A = I-A1I+ I-A2I+ I-A3I

-A

Summation

+/- +/- +/-

A1 A2 A3

Measured quantities

Start detection

+A

+ -

+ - + - + -

A1A2A3

+A-A

A1 A2A3

Fig. 3.7 Summation of magnitudes of phases in the ZMD120AP

Summation of the magnitudes separates the positive from the negative val-ues in the individual phases. Measured quantity +A therefore only containsthe positive values, -A only the negative values, provided these are pres-ent.Summation of magnitudes produces a larger +A from negative phasevalues than from vectorial summation as the above example shows. Bothmeasured quantities can have values here at the same time, but with vecto-rial summation always only one of the two.



3-7

Measured quantities One or two summation signals +A/-A result from the individual phases de-pending on the type of summation. Together with the phase signals, thisforms the measured quantities separated according to energy direction (+/-):

+A, -A Total active energy drawn (+) or supplied (-)+A1, -A1 Active energy phase L1 drawn (+) or supplied (-)+A2, -A2 Active energy phase L2 drawn (+) or supplied (-)+A3, -A3 Active energy phase L3 drawn (+) or supplied (-)

Energy total register 1Energy total register 2Energy total register 3Energy total register 4Energy total register 5Energy total register 6Energy total register 7Energy total register 8

Measuredvalues

+A1 +A2 +A3 -A1 -A2 -A3

+A - -A+A + -A

A A∆ Σ

M3 M4 M5 M6 M7 M8

-A+A

M1 M2

Measuredquantities

Selection for M1 and M2(parametrizing)

Fig. 3.8 Measured value formation and assignment for meter ZMD120AP

Measured value Measured values M1 and M2 are formed as follows from measuredformation quantities +A and -A in accordance with the parametrizing:

+ A Active energy drawn- A Active energy supplied∆ |A| Difference energy drawn minus energy suppliedΣ |A| Sum of energy drawn plus energy suppliedMeasured values M3 to M8 correspond to measured quantities +A1 to -A3.

Measured value Measured values M1 to M8 are permanently assigned to the energy totalassignment registers 1 to 8 (independent of tariff control).

Energy registers 4 energy registers are available, which can in principle be freely assignedto the measured values M1 to M8.

Tariff The meter is designed for one to four tariffs. The tariff control connects themeasured values specified by the parametrizing to the necessary registers,e.g. registers 1 and 2 to measured value M1 for two tariffs. The remainingregisters can be used for example for the measured value M2. The powersupply company can therefore use the meters with several tariffs for bothenergy directions.



Energy register 1

Energy register 2

Energy register 3

Energy register 4

Measured valuesM3 M4 M5 M6 M7 M8M1 M2

Operating time tariff 1




Total operating time

Tarif

f con

trol

Assignment of measured value /energy register corresponding to

parametrizing

Fig. 3.9 Tariff principle

Tariff control With several tariffs, the control inputs E1 or E2 changeover the tariffs (4statuses are possible with 2 input signals). The parametrizing determinesall assignments:• Status control input > tariff control signal• Tariff control signal > energy register• Tariff control signal > register operating time per tariff• Tariff control signal > tariff arrow in display

Ener

gy re

gist

er 1

Ener

gy re

gist

er 2

Ener

gy re

gist

er 3

Ener

gy re

gist

er 4

Ope

ratin

g tim

e ta

riff 1

Ope

ratin

g tim

e ta

riff 2

Ope

ratin

g tim

e ta

riff 3

Ope

ratin

g tim

e ta

riff 4

Control inputs E1 and E2

E1E2

0 10 1

0 1 0 10 0 1 1

only E1 only E2

Tarif

f arro

w 1

Tarif

f arro

w 2

Tarif

f arro

w 3

Tarif

f arro

w 4

TS1TS2TS3TS4

TS : Tariff control signal

E1 and E2

0 : no voltage1 : voltage at input

Assignmentstatus control input

> tariff control signal

Assignment TS > energy

register

Assignment TS > reg.operating

time per tariff

Assignment TS > tariffarrow indisplay

Fig. 3.10 Principle of tariff control



3-9

The following examples of tariff control show a dual and a triple tariff.

Hig

h ra

te ta

riff H

T

Low

rate

tarif

f LT

Ope

ratin

g tim

e H

T

Ope

ratin

g tim

e LT

Control inputs

E1E2

0 1 0 1 0 10 0 1 1

E1 only

Tarif

f arro

w H

T

Tarif

arro

w L

T

TS1TS2TS3TS4

TS1 : E1 = 1 : HTTS2 : E1 = 0 : LT

E1 and E2

Two-rate tariffcontrolled via E1

Fig. 3.11 Example of tariff control – Two-rate tariff

Peak

tarif

f PT

Day

tarif

f DT

Nig

ht ta

riff N

T

Ope

ratin

g tim

e PT

Ope

ratin

g tim

e D

T

Ope

ratin

g tim

e N

T

Control inputs

E1E2

0 1 0 1 0 10 0 1 1

E1 only

Tarif

f arro

w P

T

Tarif

f arro

w D

T

Tarif

f arro

w N

T

TS1TS2TS3TS4TS : Tariff control signal

E1 and E2

E1 = 1 : Day tariffE2 = 1 : Peak tariff

Three-rate tariff

Fig. 3.12 Example of tariff control – Three-rate tariff

Operating times Every energy register has a registerwhich records its operating time, i.e.how long the energy register or tariff was switched on. From this the powersupply company can recognise possible faults or cases of fraud.In addition to the operating times per energy register or per tariff, the meteralso records the total operating time in operation (connected to voltage).

User manual ZFD120AP / ZMD120AP basic versionControl elements and displays

Siemens Metering AGH 71 0200 0103 - en September 2001

4-1

4 Control elements and displays

4.1 Control elements

The meters have no control elements in the normal sense. The only oper-ating function, data acquisition, is made either by reading the display orautomatic readout via the optical or CS interface. For readout via the opticalinterface the reader head is placed in the "Readout" indentation on theplastic viewing window of the meter and readout performed with the manualterminal (refer to chapter 7 "Data readout"). The CS interface, if present, isused for remote scanning of the data via a medium suitable for this purpose(e.g. telephone network with special modem).

4.2 Liquid crystal display

The meters are provided with a simple liquid crystal display (LCD).

4.2.1 Basic layout

The basic layout shows all the indication possibilities of the liquid crystaldisplay.

1

L1 L2 L32 3 4

1 2

3

4 5 6 7

Fig. 4.1 Basic layout of liquid crystal display (LCD)

1 Energy direction2 Register contents3 Tariff4 Presence of phase voltages5 Active tariffs6 Power indicator7 Test mode

Energy direction The energy direction display always shows the sum of the 3 phases.

positive energy direction (taken from power company)

negative energy direction (supplied to power company)

negative energy direction of individual phases(second arrow flashes)


4-2 Siemens Metering AGH 71 0200 0103 - en September 2001

If no energy direction indication appears, there is no load applied to themeter.

Register contents Display of contents of relevant energy register with up to 8 digits.

Tariff Display of tariff or total energy, e.g. double tariff:

1 Energy register 1 (tariff 1)

2 Energy register 2 (tariff 2)

1 2 Total energy

Phase voltages Indication of presence of phase voltages on ZMD120AP as also onZFD120AP:

L1 L2 L3

With reversed phase sequence the characters flash if parametrized in thisway.

Active tariffs Display of active tariffs. The relevant inscription is situated on the faceplate, e.g.:

1

L1 L2 L3

High tariffLow tariff

Fig. 4.2 Display of active tariffs

Power applied Bar-chart display of power applied with the following ranges:

No-load

> 30 W

< 30 W

< 100 W

> 100 W < 300 W

> 300 W < 1 kW

> 1 kW < 3 kW

> 3 kW < 10 kW

> 10 kW < 30 kW

> 30 kW

Fig. 4.3 Power indicator

Test mode Display of test mode selected (i.e. higher resolution of energy register formeter testing). The arrow is at bottom right of the display (see Fig. 4.1).


Siemens Metering AGH 71 0200 0103 - en September 2001

4-3

4.2.2 Operating display

The values shown continuously are the operating display. This can beparametrized as fixed display (only one value present, e.g. current tariff) oras scrolling display (several values alternate in a fixed cycle).

1

L1 L2 L3

Energy level tariff 1(energy register 1)

1

L1 L2 L3L1 L2 L32

Energy level tariff 2(energy register 2)

1

L1 L2 L32

Total energy

Fig. 4.4 Example of a scrolling display

Error indication The meter can generate an error message on the basis of self-tests. Thiscan be permanently included in the operating display, only in the event ofan error or not displayed at all.

Fig. 4.5 Example of an error indication

Error messages only appear in cases of serious errors in the LCD. Theprocedure described in chapter 9 "Measures in event of faults" should thenbe followed, i.e. the meter should be changed.

Display check For the display check all segments and symbols of the display appear si-multaneously (see Fig. 4.1 "Basic layout of liquid crystal display").Here too the parametrizing determines whether it appears in the operatingdisplay or only in the display on test mode. The display in test mode can beconnected by the suitably formatted command (see 8.3 "Input of formattedcommands").


4-4 Siemens Metering AGH 71 0200 0103 - en September 2001

4.3 Test diode

The test diode is used for testing the meter. It transmits infrared pulses cor-responding to the current measured value. The number of pulses per unittime depends on the meter constant set (according to the inscription on thedial, see also Fig. 3.2) and on the power applied.Digital processing of the signals produces a delay of 1 to 2 seconds be-tween the instantaneous power at the meter and the appearance of thepulses at the test diode. No pulses are lost.

4.4 Pulse output r53

Pulse output r53 supplies a train of constant pulses every second, wherebythe pulse interval within the train is equal to the pulse length:Example: Pulse frequency 5 imp/s

Pulse length = pulse interval 40 msPulse train (5 pulses / 4 intervals) 360 msSpacing from next pulse train 640 ms

Pulse frequency : 5 imp/s

Train with5 pulses and 4 intervals:

360 ms

Spacing from next pulse train:640 ms

Second X X+1

Pulse length = pulse interval:40 ms

X+0.36

as comparison pulse sequence to test LED:uniform with variable pulse interval (160 ms)

Fig. 4.6 Pulse sequence at pulse output r53 (example)

As for the test diode, the digital signal processing also produces a delay of1 to 2 seconds at pulse output r53 between the instantaneous power at themeter and appearance of the pulses. There is also no loss of pulses in thiscase.

User manual ZFD120AP / ZMD120AP basic versionParameter setting


5-1

5 Parameter setting

The meters can be parameterized, i.e. specific parameters can be set withsoftware, so that the meters can be supplied according to the specificwishes of the relevant power company. Retroactive modification of theparameters (re-parameterizing) is also possible.Initial parameterizing and any subsequent re-parameterizing are performedby the manufacturer (or at an authorised service centre) in accordance withthe data from the power company.No re-parameterizing is possible in the field.The parameters stored in the meter are protected against unauthorisedoverwriting.

NOTE Certain operating data or meter characteristics can be altered on the spotafter installing the meter by means of formatted commands, provided this ispermitted by the initial parameterizing (further details are contained in sec-tion 8.3 "Input of formatted commands").

5.1 Values selectable

The following values can be selected:• Identification number for the power company (energy consumer identifi-

cation)• Identification number for the manufacturer (unit identification)• Measured values (+kWh / -kWh)• Number of tariffs per measured value / total energy• Operating display data / duration of display• Readout data / baud rate• Significance of cursor symbols• Meter constant (number of pulses per kWh)• Constant amount pulses (magnitude and length)• Display of installation aids

User manual ZFD120AP / ZMD120AP basic versionParameter setting


User manual ZFD120AP / ZMD120AP basic versionInstallation and commissioning


6-1

6 Installation and commissioning

WARNING Dangers can arise from live electrical installations to which the meters areconnected. Touching live parts is dangerous to life. All safety informationshould therefore be strictly observed without fail.

6.1 Introduction

The following personal and technical conditions must be fulfilled for instal-lation and commissioning of the meters:• The work described below must only be performed by technically quali-

fied and suitably trained persons.• These persons must be familiar with and observe the normal local safety

regulations.• The details in chapter 2 "Safety", in particular the safety regulations, as

well as all information concerning safe operation in this chapter, must bestrictly observed.

• A check should be made before starting work that the material and toolsrequired are all present (as in section 6.2).

6.2 Material and tools required

The following material and tools are required for installation of the meters:• Correct meter (according to type designation and characteristic data on

the dial) with intact meter seal (calibration seals)• Correct meter connection diagram (on face plate)• Fixing screws for fitting the meters on meter boards or similar device• Factory seals• Screwdriver suitable for fixing screws• WAGO original tool, if necessary size 0 screwdriver for screwless spring-

loaded terminals• Screwdriver suitable for thrust screws of phase connections• Sealing pliers for company own seals• Drilling machine for fixing holes if necessary• Phase tester or universal measuring instrument• Buzzer



6.3 Mounting the meter

WARNING The connecting wires at the place of installation must not be live when fit-ting the meter. Touching live parts is dangerous to life. The correspondingpreliminary fuses should therefore be removed and kept in a safe placeuntil work is completed, so that they cannot be replaced by anyone unno-ticed.

The meter should be mounted as follows on the meter board or similar de-vice provided for this purpose (see also Fig. 1.11 "Meter dimensions"):1. Find the correct meter position for mounting the meter.2. Determine the desired form of fixing (open or covered meter mounting).3. Set the meter suspension eyelet in the relevant position. This can be

moved up or down over the stop as illustrated below.

180

162

coveredCase edge

open

Stop

Raise strap slightly and push down over stop

Fig. 6.1 Meter suspension eyelet

4. Check with a phase tester or universal measuring instrument whetherthe connecting wires are live. If so, remove the corresponding prelimi-nary fuses and keep them in a safe place until installation is completed,so that they cannot be replaced by anyone unnoticed.

5. Mark the three fixing points (suspension triangle as in following illustra-tion) on the mounting surface provided:– horizontal base of suspension triangle = 150 mm– height of suspension triangle for open mounting = 180 mm– height of suspension triangle for covered mounting = 162 mm



6-3

150 mm

180

or 1

62 m

m re

spec

tivel

y

75 mm

Fig. 6.2 Drilling plan

6. Drill the three holes for the fixing screws.7. Unscrew the meter terminal cover.8. Fit the meter with the three fixing screws on the mounting surface pro-

vided.

6.4 Connecting meter

WARNING The connecting wires at the place of installation must not be live when fit-ting the meter. Touching live parts is dangerous to life. The correspondingpreliminary fuses should therefore be removed and kept in a safe placeuntil work is completed, so that they cannot be replaced by anyone unno-ticed.

The electrical connections to the meter should be made as follows accord-ing to the connection diagram:1. Check with a phase tester or universal measuring instrument whether

the connecting wires are live. If so, remove the corresponding prelimi-nary fuses and keep them in a safe place until installation is completed,so that they cannot be replaced by anyone unnoticed.

Connecting the phase connection lines

2. Shorten the phase connecting wires to the required length and then stripthem.

3. Insert the phase connecting wires in the relevant terminals (the terminalsare numbered as shown in the connection diagram) and tighten theterminal screws firmly (torque max. 3 Nm).



With small conductor cross-sections (e.g. 4 mm2) the connecting linemust be placed in the indentation (stamping) of the current loops, so thatit cannot shift sideways when tightening the terminal screws. Ensure thatthe connecting line remains in the indentation when tightening.

Current loop conductor

Indentation (stamping) for smaller connection lines

Fig. 6.3 Cross-section through current loop conductor

It is recommended to identify the beginning and end of the relevant con-ductors with a suitable test unit (e.g. buzzer) to ensure that the rightconsumer is connected to the meter output.

L1(1)

L2(4)

L3(7)

N(10)

(2)U1

(5)U2

(8)U3

(11) N

(15) G

(13)(33) E1 E2

(20, 21)r53

N(12)

L3(9)

L2(6)

L1(3)

Fig. 6.4 Meter connections

NOTE Insufficiently tightened screws at the phase connections can lead to in-creased power losses at the terminals and therefore to undesirable heating.A contact resistance of 1 mΩ causes a power loss of 10 W at 100 A !

Connecting the signal inputs and outputs

4. Shorten the connecting wires of the signal inputs and outputs to the re-quired length and strip them for approx. 4 mm (wires and strands up to2.5 mm2 can be connected).

5. If stranded wire is used, this must be provided with ferrules for connec-tion.

6. Connect the connecting wires of the signal inputs and outputs as followsto the screwless spring-loaded terminals (the terminals are numbered asshown on the connection diagram):− Insert a size 1 screwdriver in the upper opening and insert it turning

slightly upwards (Fig. 6.5 A).− Now place the stripped connecting wire in the lower opening and hold

it there securely (Fig. 6.5 B).− Withdraw the screwdriver. The connecting wire is then firmly fixed

(Fig. 6.5 C).



6-5

approx. 4 mm

A B C

Fig. 6.5 Connection in screwless spring-loaded terminals

WARNING The insulation of the connecting line must extend as far as the terminalindentation, i.e. there must be no further bare part of the connecting linevisible above the terminal edge (as shown in Fig. 6.5 C). Touching liveparts is dangerous to life. The stripped part of the connecting wire shouldbe shortened if necessary.

If a connecting wire must be disconnected again for any reason, this isperformed in the analog sequence (C - A - B).

CAUTION Never withdraw connecting wires with the terminal closed, since this coulddamage the terminal.

6.5 Check of connections

NOTE Only a properly connected meter measures correctly !Every connection error results in a financial loss for the power company !

Before putting into operation the following points must be checked againand corrected if necessary:1. Has the correct meter (identification number) been installed at the

measuring point of the relevant consumer ?2. Is the calibration connection closed (voltage jumper between phase and

voltage circuit) (no contact pin inserted to lift the contact spring) ?3. Are all thrust screws for the phase connections and neutral tightened

sufficiently ?4. Are the inputs and outputs for each phase connected correctly ? The

conductor from the house connection or from the consumer fuse mustbe present at the input (terminals 1, 4, 7), those of the meter to the con-sumer at the output (terminals 3, 6, 9).

5. Is the neutral conductor connected to terminals 10 and 12 ? Inter-changing of a phase with the neutral would destroy the meter.



6.6 Commissioning and functional check

WARNING The preliminary fuses must be replaced to put the meter into operation andfor the functional check. While the terminal cover remains unscrewed thereis a danger of contact with the connecting terminals. Touching live parts isa danger to life. For any modifications to the installation therefore the pre-liminary fuses must always be removed again and kept in a safe place untilcompletion of work, so that they cannot be replaced by anyone unnoticed.

NOTE If no mains voltage is yet present, commissioning and functional checkmust be performed later.

The installed meter should be put into service and checked as follows:1. Insert the preliminary fuses removed for installation. The meter is

switched on.2. Check whether the operating display appears correctly (no error mes-

sage).3. Check on the display whether all three phases L1, L2 and L3 are indi-

cated and show the phase sequence.− If one phase is not present, the relevant symbol is absent. This is also

the case if the voltage is less than 25 % Un.− With the normal phase sequence L1-L2-L3 the symbols are displayed

continuously.− If, however, the meter is connected with reversed phase sequence

(e.g. L2-L1-L3) the symbols flash. The direction of field rotation(clockwise or anticlockwise) is determined by the parametrization.This has no influence, however, on the measuring behaviour of themeter.

1

L1 L2 L3

Fig. 6.6 Phase sequence indication

Caution: Some of the aids described here are not available dependingon the version for the specific country.

4. Connect a load and check the power indicator and energy direction dis-play on the meter.

1

L1 L2 L3

Fig. 6.7 Power indicator



6-7

The power indicator provides a rough idea of the power applied (for val-ues see section 4.2 "Liquid crystal display"). With smaller load, particu-larly close to starting or no load, the meter requires a little time (up to 10s) before indicating the relevant value. This also applies to the display ofenergy direction.

L1 L2 L3

Fig. 6.8 Display of energy direction

5. Switch off the load again.If no load is present, the energy direction arrow disappears and thepower indicator only shows the upper bar.

1

L1 L2 L3

Fig. 6.9 Display of energy direction and power indicator without load

6. Check the tariff display and switch the control voltage on and off at thetariff input. The arrow symbol of the tariff display must change.

7. Screw on the terminal cover if the meter is operating correctly. Other-wise first locate and eliminate the error.

8. Seal the terminal cover with two factory seals.

User manual ZFD120AP / ZMD120AP basic versionData readout


7-1

7 Data readout

The power supply company can record the data stored in the meter, par-ticularly the energy consumption, on the spot at any time in three ways:• Reading the liquid crystal display of the meter. Only the data of the

scrolling operating display can be recorded however (energy registers,identification numbers, error messages).

• Data readout on the spot via the optical interface with the aid of a com-munication unit (e.g. hand held terminal T3000).

• Remote scanning of data via CS interface, if present, with the aid of asuitable medium (e.g. telephone network and special modem).Further data are accessible during readout via one of the interfacesdepending on the parameterizing (energy registers of individual phases,event information, etc.). Interface and log correspond to the provisions ofIEC 61107 or DLMS (Device Language Message Specification), a com-munication standard for meters. They differ as follows:− For IEC 61107 all data are read out in total according to the

parameterizing.− For DLMS every value can be read out individually.

The hand terminal and not the meter determines which process is used.If the meter is fitted with the appropriate extension (see associated sepa-rate operating instructions) remote scanning of the meter data is also pos-sible.

7.1 Data readout via optical interface

Procedure:1. Start the communication unit (according to the details in the associated

operating instructions).2. Connect the cable of the reader head to the manual terminal.3. Place the reader head in the "Readout" indentation on the plastic view-

ing window of the meter. The reader head cable must point towards theterminal cover (when mounted vertically downwards). The reader headis held magnetically.

4. Start the data readout on the manual terminal (according to the details inthe associated operating instructions).

5. Remove the reader head from the meter again after completing thereadout.



Example of log The data read out are recorded in the form shown below. The scope andsequence of values in the log is determined by the parameterizing.Log Significance

/LGZ4\2ZMD120APCS Unit recognition for the specific manufacturer(no identification of data)

F.F(000000) Error message0.0(726434) Identification number

(allocation of data to consumer)1.8.1(0010322 kWh) Energy reading tariff 11.8.2(0005297 kWh) Energy reading tariff 21.8.0(0015619 kWh) Total energyC.7.0(0015) Number of meter disconnection’s

(failure of all voltages)C.2.1(01-02-10) Date of last parameterizing! End of log

Fig. 7.1 Example of readout log

Data available The following data can be read out with corresponding parameterizing ofthe meter (maximum scope):• One error message (error code 00 00 00, if no error present)• Identification number for the power company (energy consumer identifi-

cation)• Identification number for the manufacturer (unit identification)• Program version number• Parameter set number• Circuit number• Energy registers 1 to 4• Total energy registers M1 to M8• Statuses of control signals at the input and output terminals• Statuses of internal control signals (tariff, direction signals)• Internal operating statuses (phase voltages, direction of rotating field)• Number of voltage failures (total failures)• Number of voltage failures in individual phases• Pulse constant of test diode• Parameterizing (number of modifications, date of last change of

parameter, status of parameterizing lock)• Identification numbers of parameterizing, unit software and circuit.• Operating time in minutes (total, time registers 1 to 4)



7-3

7.2 CS interface

The serial bi-directional CS interface (current loop interface) is standardizedto IEC 61107 or DIN 66258 and provides the data in international ASCIIcode. The CS interface supports the communication protocol according toIEC 61107. By means of a suitable reader (e.g. laptop, hand terminal) itpermits communication with the meter (e.g. readout of data stored in thetariff unit, entering or modification of parameters).

Communication unit Ax

RTX+ RTX-

V+ V-TX RX

ReaderActive part

Passive part

Connectionfirm or temporary

Fig. 7.2 Functional diagram of CS interface

A further application possibility of the CS interface is remote scanning ofdata of individual meters or data from up to 8 meters (CS interfaces) inseries. The latter requires the use of IEC device addresses.

tariff unit

RTX+ RTX-

V+ V-TX RX

HHU

tariff unit

RTX+ RTX-

tariff unit

RTX+ RTX-

maximum 8 tariff units / meters

Fig. 7.3 Functional diagram of several CS interfaces in series

The CS interface uses the screwless spring-loaded terminals at far right.

User manual ZFD120AP / ZMD120AP basic versionMaintenance and service


8-1

8 Maintenance and service

8.1 Meter check

The following points should be checked on the meters periodically (e.g. withevery data readout):• Is the meter dry and clean (particularly display and optical interface) ?• Is the meter in operation and serviceable (operating display present and

sensible) ?• Are all calibration and company seals undamaged ?• Has the meter internal self-test performed regularly recorded any error

since the previous check (check on the display or readout log).• Have the values of the energy registers changed within reasonable limits

since the last data readout (no unauthorised manipulations made to theinstallation) ?

Continue as described in chapter 9 "Measures in event of faults" if errors orirregularities are found.

8.2 Meter testing

Meter tests should be performed at periodic intervals according to the validnational regulations (either on all meters or on specific random samples).For this purpose the meters must be removed as described in section 9.3and replaced by a substitute meter for the duration of the test.

8.2.1 Test mode

The energy registers comprise a total of 12 digits. A maximum of 8 digits,however, is shown on the display. The effective number of digits shown andthe number of decimal places are determined by the parameterizing. Forthe test mode more decimal places are normally parameterized (maximum4) to permit a quicker test of the transmission to the energy registers.

Register ,Display in normal mode

Display in test mode

Fig. 8.1 Display range changeover normal mode - test mode

Changeover from normal to test mode and back is made by formattedcommands (see chapter 8.3 "Input of formatted commands").



8.2.2 Measuring times

For technical reasons greater measuring deviations can occur during short-term measurements. It is therefore recommended to use sufficiently longmeasuring times in order to achieve the required accuracy (e.g. at least30 s for 0.25 A single-phase; the testing time is reduced accordingly forhigher currents).

Table of measuring times required: <tatsächliche Zeiten einsetzen>ZMD120AP Measuring uncertainty

0.2 %Measuring uncertainty

0.1 %Un = 230 V Current

[A]3 P

cosϕ=11 P1

3 P0.5

3 Pcosϕ=1

1 P1

3 P0.5

0.1 90 s 4.5 min 6 min 6 min 18 min 23 min

0.2 25 s 70 s 90 s 90 s 4.5 min 6 min

0.5 5 s 12 s 15 s 16 s 45 s 60 s

1 2 s 4 s 5 s 6 s 13 s 16 s

2 1.5 s 2 s 2 s 3 s 5 s 6 s

5 1.1 s 1.2 s 1.2 s 2.2 s 2.5 s 2.5 s

10 1.0 s 1.1 s 1.1 s 2.1 s 2.2 s 2.2 s

20 1.0 s 1.0 s 1.0 s 2.0 s 2.1 s 2.1 s

50 1.0 s 1.0 s 1.0 s 2.0 s 2.0 s 2.0 s

100 1.0 s 1.0 s 1.0 s 2.0 s 2.0 s 2.0 s

3 P = universal1 P = single-phase

ZFD120AP Measuring uncertainty0.2 %

Measuring uncertainty0.1 %

Un = 230 V Current[A]

3 Pcosϕ=1

1 P1

3 P0.5

3 Pcosϕ=1

1 P1

3 P0.5

0.1 3 min 12 min 11 min 11 min 46 min 44 min

0.2 42 s 3 min 3 min 3 min 12 min 11 min

0.5 8 s 30 s 27 s 30 s 2 min 2 min

1 3 s 8 s 8 s 9 s 30 s 30 s

2 1.5 s 3 s 3 s 4 s 9 s 9 s

5 1.1 s 1.3 s 1.3 s 2.3 s 3 s 3 s

10 1.1 s 1.1 s 1.1 s 2.1 s 2.3 s 2.3 s

20 1.0 s 1.0 s 1.0 s 2.0 s 2.1 s 2.1 s

50 1.0 s 1.0 s 1.0 s 2.0 s 2.0 s 2.0 s

100 1.0 s 1.0 s 1.0 s 2.0 s 2.0 s 2.0 s



8-3

8.2.3 Test diode

The infrared test diode on the meter below the LCD should be used formeter testing. This supplies pulses at a frequency dependent on the meterconstant R and the power present, whereby the rising edge is always deci-sive for the test.Note that the digital signal processing provides a delay of 2 seconds be-tween the instantaneous power at the meter and the appearance of thepulses at the test diode. No pulses are lost.The number of pulses per second for the desired power is obtained bymultiplying the meter constant R by the power in kW divided by 3600.Example: Meter constant R = 1000

Power P = 35 kWf-LED = R x P / 3600 = 1000 x 35 / 3600 = 10 imp/s

The test diode is continuously lit at creep.

8.2.4 Installation of meters on a testing device

For testing the meter it should be connected to a testing device speciallyprovided for this purpose.The meter uses a voltage jumper similar to the series ZxB meters. A springcontact connects the voltage circuit of the meter to the phase terminal (seeleft-hand side of the following figure).Procedure:1. Connect the meter to the terminals of the testing device as shown in the

connection diagram on the dial and according to the usual testing meth-ods.

2. To connect the test voltage use connecting cable with a contact pin of2.5 mm diameter and approx. 40 mm long (between 39 and 41 mm).This contact pin is inserted in the circular opening provided in the termi-nal cover above the measuring terminals. The pin lifts the spring fromthe contact tip of the current loop and therefore breaks the connection.

WARNING The voltage cables must always be free from voltage when inserting.Touching live contact pins can be fatal.

3. After testing, withdraw the cable with the contact pins (not under voltage)from the terminal cover. The spring closes the current loop contact andtherefore the voltage jumper automatically.

CAUTION Do not use tools such as screwdrivers or cables, which could bend ordamage the springs in any way.



Contact spring

Contact pin

Current loop

Print board

Current terminal

Voltage cableVoltage bridge

openVoltage bridge

closed

Contact toprint boardContact toCurrent loop

Fig. 8.2 Voltage bridge – closed at left, open at right

8.2.5 Creep test

A test voltage Up of 1.15 Un is used for the creep test (no-load test) toIEC 61036 (e.g. Up = 265 V with Un = 230 V).Procedure:1. Disconnect the meter from the mains for at least 10 seconds.2. Then switch on the test voltage Up and wait approx. 10 seconds. After

this time all segments of the power indicator must be switched off, ex-cept the top bar and the energy direction arrow must disappear. Theinfrared test diode is permanently “lit”, which can only be verified, how-ever, with a suitable testing device.

3. Switch on test mode (high resolution).4. The meter must not deliver more than one pulse during the creep test.

Check the energy levels for changes in test mode. They must not in-crease by more than the value of one pulse (see dial).

8.2.6 Starting test

Procedure:1. Apply a load current of 0.1 % of the base current lb (e.g. 10 mA with lb =

10 A) and the voltage Un (three-phase in each case). The meter mustremain in creep.

2. Increase the load current to 0.5 % lb (i.e. 50 mA with lb = 10 A), Theenergy direction arrow and the first segment of the power indicator onthe left must appear within 10 seconds. The test diode is no longer per-manently “lit”.Note the following:The power indicator shows the first segment from a fixed power of 30 W.Start detection, however, depends on the power associated with thebase current lb (see chapter 1.2.3). At higher base currents (20 or 40 A)the segment only appears when the starting power is reached, even ifthe power itself is greater than 30 W.



8-5

8.3 Input of formatted commands

The following operating data or meter characteristics can be modified bythe input of formatted commands:• Identification numbers for the power supply company and the manu-

facturer, provided the modification possibility has been released by theparameterizing (for one change or always)Instruction: "Set ID 1"

• Test mode (switch on and off)Instructions: "Switch on test mode", "Switch off test mode"

Formatted commands are transferred to the meter with a suitable aid (handheld terminal or laptop) via the optical interface.Procedure:1. Start the hand held terminal or laptop (according to the details in the as-

sociated operating instructions).2. Connect the cable of the reading head to the manual terminal or laptop.3. Place the reading head in the "Read" indentation on the plastic viewing

window of the meter. The reading head cable must point towards theterminal cover (when mounted vertically down). The reading head is heldmagnetically.

4. Input the required formatted commands to the meter (according to thedetails in the operating instructions for the communication software usedwith the hand held terminal or laptop).After normal opening the meter is informed with the following signal thatchangeover is to be made to the programming mode:<ACK> 0Z1 <CR> <LF>"Z" indicates the relevant baud rate.The meter then acknowledges with the following sequence:<SOH> P0 <STX> () <ETX> <BCC>For setting the ID 1 (if released in the basic parameterizing):<SOH> W2 <STX> D000(xxxx) <ETX> <BCC>"xxxx" indicates the data content to be written in ID 1.Since the meters of series Z.D120AP do not use passwords, theformatted commands can be sent directly:To switch on the test mode (high resolution, etc.).<SOH> E2 <STX> 0101() <ETX> <BCC>The test mode switched on is switched off automatically after approx. 24hours or for an interruption in the supply voltage.To switch off the test mode (high resolution, etc.):<SOH> E2 <STX> 0102() <ETX> <BCC>



5. Check that the desired effect takes place, e.g. that the modified identifi-cation number has been correctly stored in the meter (display or readoutlog) or if the test mode has been switched on (arrow symbol on display).The meter acknowledges every formatted command with<ACK>which confirms execution of the formatted command or with<NAK>which indicates that the formatted command has not been understood.The sequence of formatted commands is correctly concluded with<SOH> B0 <ETX> <BCC>Full details of formatted commands can be found in IEC Standard61107.

6. Remove the reading head from the meter again after transmission.

User manual ZFD120AP / ZMD120AP basic versionMeasures in event of faults


9-1

9 Measures in event of faults

9.1 Error messages

The meters regularly perform an internal self-test. This checks the correctfunction of all important parts.In the event of a serious error detected, the meters display an error code.This error code appears as a two-digit figure together with "F.F" or "FF" inthe display, depending on the parameterizing and significance of the error.The error code is always included in the readout log (error code 00 00 00 =no error).If a so-called fatal error appears on the display (see below), the metershould be removed and sent to the responsible service and repair centre(according to section 9.4 "Repairing meters").

9.1.1 Structure of an error message

An error message from the ZxD120AP has the following form:

Fig. 9.1 Error message display

Meters of the ZxD series all use the same format for error messages. Thisconsists of four groups of 2 digits each, whereby the groups have the fol-lowing significance:

Error message of ZxD series:

F.F 0 0 0 0 0 0 0 0

Time-baseerror (clock)

Error forwrite/read

access

Check-sumerror

Othererrors

Structure

Error messagesof ZxD120AP

Not used for ZxD120AP

Fig. 9.2 Error message of ZxD120AP

Of the four groups, the ZxD120AP only uses the last three. The first doesnot appear, since it refers to a time-base error. The meter, however, has nocalendar or time switch.



Each group has two digits written in hexadecimal notation and can there-fore have the values 0 to 9 and letters A to F. Both digits each form the sumof the individual values of 4 possible types of error as shown in the follow-ing diagram.

9.1.2 Error groups

Error for write/read access

Group 1 of error message of ZxD120AP

1248 1248RAM main memoryEEPROM backup/parameter memoryHMC Measuring system

* not used for ZxD120AP

*

****

Value in hexadecimal code

Sum of values

Fig. 9.3 Group 1 of error message

The first digit in the first group has no significance, since no error messagesare assigned to it.The second digit can have values between 0 (no error message) and 7 (allthree error messages set). Significance:

F 01 00 00 Error in RAM main memoryThis appears in the display as a so-called Fatal Error when starting themeter if the RAM test fails.The meter does not operate and must be changed.The same applies to messages F 03 .. .. / F 05 .. .. / F 07 .. .. .

F 02 00 00 Error in EEPROM read-only memoryThe meter supplies this message in the event of a repeated memory testfailure. The meter can contain faulty data or fail.

F 04 00 00 Error in the measuring system (DFS)The meter supplies this message for repeated failure of the measuringsystem test. The meter can contain faulty data or fail.



9-3

Check-sum error


1248 1248ROM check-sumEEPROM backup data check-sum

* not used for ZxD120AP

*

****


Sum of values

EEPROM parameter check-sum


The first digit in the second group has no significance, since no error mes-sages are assigned to it.The second digit can have values between 0 (no error message) and 7 (allthree error messages set). Significance:

F 00 01 00 Check-sum error in ROM of microprocessorThis appears in the display as a so-called Fatal Error when the relevantROM test fails.The meter does not operate and must be changed.The same applies to messages F .. 03 .. / F .. 05 .. / F .. 07 .. .

F 00 02 00 Check-sum error in EEPROM for backup dataThis also appears on the display as so-called Fatal Error if the relevantEEPROM test fails.The meter does not operate and must be changed.The same applies to messages F .. 06 .. / F .. 03 .. / F .. 07 .. .

F 00 04 00 Check-sum error in EEPROM for parametersThis also appears on the display as so-called Fatal Error if the relevantEEPROM test fails.The meter does not operate and must be changed.The same applies to messages F .. 05 .. / F .. 06 .. / F .. 07 .. .



Other errors


1248 1248

Overflow in measuring system

System error (e.g. watchdog)

* not used with ZxD120AP *

*

*

*

*


Sum of values

EEPROM identification


The first digit can have the values 1, 4 or 5, the second digit only thevalue 2. Significance:

F 00 00 02 Overflow or no activity of measuring system

The meter has detected an error in the data processing. It cannot havemeasured a certain proportion of the energy.

F 00 00 10 System error in microprocessor

The meter loses all data determined since the last saving, i.e. not longerthan 24 hours.

F 00 00 40 Identification of the EEPROM differs from that of the microprocessor ROMIt appears in the display as Fatal Error if the relevant test fails.The meter does not operate and must be changed.The same applies to messages F .. .. 42 / F .. .. 50 / F .. .. 52 .



9-5

9.2 Operating faults

If the liquid crystal display is illegible or the data readout does not function,the following points should first be checked:1. Is the mains voltage present (preliminary fuses intact) ?2. Is the maximum permissible ambient temperature not exceeded ?3. Is the plastic viewing window over the dial clean (not scratched, painted

over, misted over or soiled in any way) ?

If none of the points listed is the cause of the fault, the meter should be dis-connected, removed and sent to the responsible service and repair centre(according to section 9.4 "Repairing meters").

WARNING Never clean soiled meters under running water or with high pressure de-vices. Penetrating water can cause short-circuits. A damp cleaning cloth issufficient to remove normal dirt such as dust. If the meter is more heavilysoiled, it should be dismantled if necessary and sent to the responsibleservice and repair centre, so that a new plastic viewing window can be fit-ted.

9.3 Disconnecting meters

WARNING The connecting wires at the place of installation must not be live when re-moving the meter. Touching of live parts is dangerous to life. The corre-sponding preliminary fuses should therefore be removed and kept in a safeplace until work is completed, so that they cannot be replaced by anyoneunnoticed.

The meter should be removed as follows:1. Remove the two factory seals at the screws of the terminal cover.2. Release and remove the two screws of the terminal cover.3. Check that the connecting wires are not live using a phase tester or uni-

versal measuring instrument. If they are live, remove the correspondingpreliminary fuses and keep these in a safe place until work is completed,so that they cannot be replaced by anyone unnoticed.

4. Remove the connecting wires of the signal inputs and outputs from thescrewless spring-loaded terminals as follows:− Place a WAGO original tool, if necessary size 0 screwdriver for

screwless spring-loaded terminals in the upper opening and insert itturning slightly downwards (Fig. 9.6 A).

− Then draw the wire from the lower opening (Fig. 9.6 B).− Withdraw the screwdriver (Fig. 9.6 C).



A B C

Fig. 9.6 Removing connections in screwless spring-loaded terminals

CAUTION Never withdraw connecting wires from closed terminals. The terminalscould be damaged.

5. Release the terminal screws of the phase connecting wires with a suit-able screwdriver and withdraw the phase connecting wires from the ter-minals.

6. Fit a substitute meter as described in section 6.4 "Connecting meter"and the following chapters.

9.4 Repairing meters

Meters must only be repaired by the responsible service and repair centre(or manufacturer).The following procedure should be adopted if a meter repair is necessary:1. If installed, remove the meter as described in section 9.3 and fit a sub-

stitute meter.2. Describe the error found as exactly as possible and state the name and

telephone number of the person responsible in case of inquiries.3. Pack the meter to ensure it can suffer no further damage during trans-

port. Preferably use the original packing if available. Do not enclose anyloose components.

4. Send the meter to the responsible service and repair centre.

User manual ZFD120AP / ZMD120AP basic versionDecommissioning, disposal


10-1

10 Decommissioning, disposal

The procedure for disconnecting and removing the meter from the systemis described in section 9.3.

Based on the data specified in environmental certificate ISO 14001, thecomponents used in meters are largely separable and can therefore betaken to the relevant disposal or recycling point.

NOTE For the disposal of meters observe the local disposal and environmentalprotection regulations in effect without fail.

Components DisposalPrinted circuit boards,LCD display

Electronic waste: disposal according to localregulations.

Metal parts Sorted and taken to collective materials disposalpoint.

Plastic components Sorted and taken to recycling (regranulation)plant or if no other possibility to refuse incinera-tion.

User manual ZFD120AP / ZMD120AP basic versionDecommissioning, disposal


landis & gyr dialog - zxd120ap active energy meter … & gyr dialog - zxd120ap active energy...

Documents