6ra24 englisch

8/12/2019 6RA24 Englisch

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SIMOREG K

6RA24

Instruction Manual

SIMOREGSIEMENS

Edition: G Order-No.: 6RX1240-0AD76


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SIMOREG K

6RA24 converters with microprocessor,

from 6kW to 774kW in a B6C fully-controlledtree-phase bridge circuit and

circulating current-free, anti-parallel circuit

(B6)A(B6)C for DC variable-speed drives

Instruction Manual

Order-No.: 6RX1240-0AD76

Converter software release: starting with 2.00

March 1994 Edition


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16 Installation instructions for EMC-correct

installation of Drives

NOTE

These Installation Instructions do not purport to handle or take into account all of the equipmentdetails or versions or to cover every conceivable operating situation or application.If you require more detailed information, or if special problems occur, which are not handled inenough detail in this document, please contact your local Siemens office.

The contents of these Installation Instructions are not part of an earlier or existing agreement or legalcontract and neither do they change it. The actual purchase contract represents the complete liabilityof the ASI 1 Variable-Speed Drives Group of Siemens AG. The warranty conditions, specified in thecontract between the two parties is the only warranty which will be accepted by the ASI 1 Variable-Speed Drives Group. The warranty conditions specified in the contract are neither expanded norchanged by the information provided in these Installation Instructions.

WARNING

These converters have components and parts at hazardous potentials, have

dangerous rotating machine components (fans) and control rotating mechanical

equipment (drives). Death, severe bodily injury or significant material damage

could occur if the instructions in the associated Instruction Manuals are not

followed.

Only qualified personnel who are knowledgeable about all of the safety informa-

tion and instructions specified in the Instruction Manual as well as installation-,

operating- and maintenance information may work on these converters.

Perfect and safe operation of the converters assumes that they have beenprofessionally transported, stored, installed and mounted as well as careful

operator control and maintenance.

16.1 EMC basics

16.1.1 What is EMC

EMC stands for electromagnetic compatibility and defines the capability of a piece of equipment tooperate satisfactorily in an electromagnetic environment without itself causing electromagnetic

disturbances which would be unacceptable for other electrical equipment in this environment.

Thus, the electrical equipment should not mutually disturb each other.

16.1.2 Noise radiation and noise immunity

EMC is dependent on two characteristics of the equipment/units involved - the radiated noise andnoise immunity. Electrical equipment can either be fault sources (transmitters) and/or noise receivers.Electromagnetic compatibility exists, if the fault sources do not negatively influence the function of thenoise receivers.

A piece of electrical equipment/unit can also be both a fault source and fault receiver at the same time.For example, the power section of a converter can be considered as noise source, and the control

section (gating unit, etc.), as noise receiver.


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16.1.3 Maximum values

The Product Standard E DIN IEC 22G/21/CDV is available as draft for electric drives. According to thisproduct standard, all EMC measures are not necessarily required for industrial supply networks, and asolution should be defined, adapted to the actual environment. Thus, it may be more cost-effective toincrease the noise immunity of a sensitive piece of equipment than implementing noise suppressionmeasures for the converter. Thus, a solution is selected dependent on its cost-effectivness.

The basic EN 50081 and EN 50082 Standards are valid until the Product Standard comes into force.These specify that EN 55011 must be maintained. These define max. values for noise radiation inindustrial- and domestic environments. Cable-borne noise at the supply connection point is measuredunder standardized conditions as radio interference noise voltage, electromagnetically radiated noiseas radio interference (radiated noise). The standard defines max. values A1 and B1, which are validfor the radio interference voltage in the range between 150kHz and 30MHz and for radio interferenceradiation between 30MHz and 2GHz. As SIMOREG K converters are used in industrial applications, inthis case, limit value A1 is valid. To achieve value A1, SIMOREG K converters must be providedwith external radio interference suppression filters.The noise immunity defines the behavior of a piece of equipment subject to electromagnetic noise. For

industrial applications, the EN50082-2 Standard defines the demands and evaluation criteria for thebehavior of the unit/equipment. This standard is fulfilled by the converters listed in Section 16.2.3.

16.1.4 SIMOREG K converters in industrial applications

In an industrial environment, equipment must have a high level of noise immunity whereas lowerdemands are placed on noise radiation.SIMOREG K converters are components of an electric drive system, along with contactors andswitches etc. Professionally trained personnel must integrate them to form a complete drive system,which comprises, as a minimum, the converter itself, motor feeder cables and motor. Generally,commutating reactors and fuses are also required. Limiting (max.) values can only be maintained ifthese components are installed and mounted in the correct way. In order to limit the radiated noise

according to limit value A1, in addition to the converter, a radio interference suppression filter and acommutating reactor are required. If SIMOREG K converters are not equipped with radio interferencesuppression filters, the radiated noise exceeds limit value A1, specified in EN55011.

If the drive is part of an overall system, initially it does not have to fulfill any requirements regardingradiated noise. However, the EMC Law specifies that the system as a whole must be electromagneti-cally compatible with its environment.If all of the system control components (e.g. PLCs) have noise immunity for industrial environments,then it is not necessary that each drive maintains limit value A1 for itself.

16.1.5 Non-grounded supplies

Non-grounded supplies (IT-supplies) are used in several industrial sectors, in order to increase theavailability of the plant. If a ground fault occurs, a fault current does not flow, and the plant can stillproduce. However, when a radio interference suppression filter is used, when a ground fault occurs, afault current does flow, which can result in the drive being shutdown or even the radio interferencesuppression filter being destroyed. Thus, the Product Standard does not define limit values for thesesupplies. From a cost standpoint, if radio interference suppression is required, this should be realizedat the grounded primary of the supply transformer.


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16.1.6 EMC planning

If two units are not electromagnetically compatible, you can either reduce the noise radiated by thenoise source, or increase the noise immunity of the noise receiver. Noise sources are generally powerelectronic units with a high current requirement. In order to reduce the radiated noise from these units,complex, costly filters are required. Noise receivers especially involve control units and sensors,including their evaluation circuitry. It is less complex and costly to increase the noise immunity of low-power equipment. Thus, in an industrial environment it is often more cost-effective to increase thenoise immunity rather than reduce the radiated noise. For example, in order to maintain limit valueClass A1 of EN 55011, the radio interference voltage at the supply connection point at 150kHz and

500kHz, may not exceed 79dB(V) and between 500kHz and 30Mhz, 73dB(V) (9mV or 4.5mV).In industrial environments, the EMC of the equipment used must be based on a well-balanced mixtureof noise radiation (low level) and noise immunity.

The most favorably priced interference measure is to spatially isolate noise sources and noisereceivers, assuming that it is already taken into account when designing the machine/plant. The firststep is to define whether each unit is a potential noise source (noise radiator) or noise receiver. Noisesources are, for example, converters, contactors. Noise receivers are, for example, PLCs, transmitters

and sensors.The components must be spatially separated in the cabinet (noise sources and noise receivers), usingmetal partitions or by mounting the components in metal enclosures. A possible component layoutconfiguration in a cabinet is illustrated in Fig. 1.

16.2 EMC-correct installation/mounting of converters(installation instructions)

16.2.1 General information

As drives can be operated in a wide range of differing environments, and as the electrical componentsused (controls, switched-mode power supplies etc.) can widely differ regarding noise immunity andnoise radiation, any mounting/installation guideline can only be represent a practical compromise.Thus, deviations can be made from the EMC regulations, under the assumption that they are checked-out on a case-for-case basis.

In order to guarantee electromagnetic compatibiity (EMC) in your cabinets in rugged electricalenvironments, and alsofulfill the standards specified by the relevant legal bodies, the following EMCregulations must be observed when designing and manufacturing the drive cabinets.

Rules 1 to 10 are generally valid. Rules 11 to 15 are necessary, in order to fulfill the noise radiatingstandards.

16.2.2 Rules for EMC-correct installation

Rule 1All of the metal cabinet components must be electrically connected with one another through thelargest possible surface area (not paint on paint!). If required, use serrated washers. The cabinet doorshould be connected to the cabinet through grounding straps (top, center, bottom) which should bekept as short as possible.

Rule 2Contactors, relays, solonoid valves, electro-magnetic operating hours counters etc. in the cabinet, and

if required, in adjacent cabinets, should be provided with quenching elements, for example, RCelements, varistors, diodes etc. These devices must be connected directly at the coil.


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Rule 3

Signal cables 1)should enter the cabinet, if possible, at only one level.

Rule 4Non-shielded cables belonging to the same circuit (incoming and outgoing conductor) should betwisted, or the surface between the two conductors kept as low as possible in order to prevent

unnecessary coupling effects.

Rule 5Connect reserve conductors to the cabinet ground at both ends. This offers an additional shieldingeffect.

Rule 6Unnecessary cable/conductor lengths should be avoided. Thus, coupling capacitances andinductances are kept low.

Rule 7Crosstalk is kept low if cables are routed close to the cabinet ground. Thus, wiring shouldnt be routedfreely in the cabinet, but as close as possible to the cabinet frame and mounting panels. This is also

true for reserve cables.

Rule 8Signal- and power cables should be routed separately from one another (to avoid noise being coupled-in!). A minimum 20cm clearance should be maintained.If it is not possible to spatially separate encoder- and motor cables, then the encoder cable must belaid either using a metal partition or in a metal pipe or duct. The partition or metal pipe must begrounded at several locations along this length.

Rule 9The shields of digital signal cables must be connected to ground at both ends (source and destination)through the largest possible surface area. If there is poor potential bonding between the shieldconnections, to reduce the shield current, an additional potential bonding cable of at least 10mm must

be connected in parallel to the shield. The shields can be connected to the cabinet frame at severalpositions (ground). The shields can also be connected to ground at several locations, even outside thecabinet.Foil-type shields should be avoided if possible. They do not shield as well as braided shields; they arepoorer by a factor at least 5.

Rule 10The shields of analog signal cables can be connected to ground at both ends if potential bonding isgood (through the largest possible surface area). Good potential bonding can be assumed, if all metalparts are well connected and all of the electronic components involved are supplied from one source.

The single-ended shield connection prevents low-frequency, capactive noise from being coupled-in(e.g. 50Hz hum). The shield should be connected in the cabinet, whereby the shield can also be

connected up through a connecting wire.

Rule 11Always locate the radio interference suppression filter close to the assumed noise source. The filtermust be mounted through the largest possible surface area at the cabinet housing, mounting panel etc.The input and output cables must be spatially separated.

Rule 12

Radio interference suppression filters must be used in order to maintain limit value class A1. Additional

loads must be connected in front of the filter (line supply side).

Ob ein zustzliches Netzfilter installiert werden mu, ist abhngig von der verwendeten Steuerung und

wie der restliche Schaltschrank verdrahtet ist.


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Rule 13

A commutating reactor is required in the field circuit for controlled field supplies.

Rule 14

A commutating reactor is required in the converter armature circuit.

Rule 15For SIMOREG drives, the motor cables can be unshielded. The line supply cable must be a minimum

of 20cm away from the motor cables (field, armature).

If required, use a metal partition.

Footnotes:

1) Signal cables are defined as:

Digital signal cables.: or analog signal cables.:Pulse encoder cables (e.g. + 10V setpoint cable)Serial interfaces, e.g. PROFIBUS-DP

2) Generally, all metallic conductive parts, which can be connected to a protective conductor, e.g.cabinet housing, motor frame, foundation grounder, etc., are considered as ground.

Cabinet design and shielding

The cabinet design illustrated in Figure 1is intended to make the user sensitive and aware of EMC-critical components and parts. The example does not claim to handle all possible cabinet componentsand their respective mounting possibilities.

Details, which influence the noise immunity/noise radiation of the cabinet and which arent absolutely

clear in the overview diagram, are described in Figures 1a - 1d.

Different shield connecting techniques with reference source information are illustrated in detail inFigures 2a - 2d.

Mounting radio interference suppression filters and commutating reactors:

Radio interference suppression filter and commutating reactor mounting for SIMOREG K drives isdescribed in Section 16.2.3. The sequence when installing the reactor and filter must be maintained.The semiconductor protection fuses are selected according to the Instruction Manual of the converters.


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SIMOREG KConverter

Main conductor

Cable rataining bar

Shield rail

Terminals

Commutating reactor

Cable duct

Line filter

SIMOREG K

Shield rail

Terminals Main switch

Circuit-breaker

Field

Field commutating

reactor

Fuse links/m.c.b.

Converter filter

Fuse links

Control transformerfan

Protective conductor(location is non-critical) DC customer connection

3-ph. AC customer connection

Field customer connection

Pulse encoder

Figure 1b

Figure 1c

Figure 1a

Figure 1d

Shield rail

Circuit-breaker

Figure 1: Example of a cabinet design with a SIMOREG K converter (with

microprocessor) 30A - 600A


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Cable retaining bar

Shield connection corresponding to

the following versions 1, 2, 3 and 4.

Connect to the cabinet housingat both endstrough the largestpossible surface area!

Also shield on the plant side(e.g. at the pulse encoder).

Cable duct

Shield rail must not beused as strain relief

Cable retaining bar

Figure 1a: Shielding where the cable enters the cabinet

Terminals

Analog signal lineData line

(e.g. PROFIBUS-DP)Data line

(e.g. Pulse encoder)

Connect to the cabinet housingat both endstrough the largestpossible surface area!

Also shield on the plant side(e.g. at the pulse encoder).

Figure 1b: Shielding in the cabinet


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Cables to theext. terminal block

InterfacesRS 485, RS 232

Cables to the externaloperator control panel

Connect the board to theSIMOREG housing

Internal shield rail

Electronics boardC98043-A1600

XA XB X501 X500

X300

Figure 1c: Connecting the shields at the SIMOREG K 6RA24


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LINE

Filtered cable Non-filtered cable

Connect the filter to the cabinet

housing through the largest

possible surface area!Seperate the filtered andnon-filtered cables

Connect theprotective conductor

Siemens

Figure 1d: Line filter for the SIMOREG K 6RA24 electronics power supply


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Shield connection:

Version 1: Version 2:

Figure 2a: Connecting terminal mountedon a copper busbar, max.cable/cable diameter 15mm

Figure 2b: Terminal mounted on acopper busbar, max.cable/cable diameter 10mm.

Caution!

The conductor could be damaged if the terminalscrew is over-tightened

Note:

Terminals:5mm busbar thickness,Order No. 8US1921-2AC0010 mm busbar thickness,Order No. 8US1921-2BC00

Note:

Terminals:Order No. 8HS7104,8HS7104, 8HS7174, 8HS7164


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Version 3: Version 4:

Figure 2c: Metalized tubing or cable tieson a bare metal serrated rail

Figure 2d: Clamp and metalic matingpiece on a cable support rail.

Note:

Serrated rail:Item No. J48028

Note:

Siemens 5VC55... cable clamps;Various size mounting rails:Item No. K48001 to 48005

Can be ordered from:

SIEMENS AG ANL A443 KA

Gnther-Scharowsky-Str. 2Betriebe Sd91058 Erlangen

Can be ordered from:

SIEMENS AG ANL A443 KA

Gnther-Scharowsky-Str. 2Betriebe Sd91058 Erlangen


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16.2.3 Converter component arrangement

Reactor and filter arrangement

Supply voltage

1U1 1V1 1W13U1 3W15U1 5W1

Field ArmaturePower supply

SIMOREG-Converter1C1 1D1

M

3C 3D

1) 2)

4)

3)

1) The commutating reactor in the field circuit is dimensioned for the nominal motor field current.

2) The commutating reactor in the armature circuit is dimensioned for the nominal motor armaturecurrent. The line supply current is the DC current x 0.82.

3) The field circuit filter and the electronics power supply are dimensioned for the nominal motor fieldcurrent plus 0.5A.

4) The armature circuit filter is dimensioned for the nominal motor armature current. The line supplycurrent is the DC current x 0.82.

Note:

When filters are used, commutating reactors are always required at the converter input to decouple thesnubber circuitry.The commutating reactors are selected according to the information provided in Catalog DA93.1.


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16.2.4 List of the recommended radio interference suppression filters

Rated current

radio

interferencesuppression

filter (A)

Radio interference

suppression filter

Order No.

Terminal

cross-

section(mm)

Weight

(kg)

Dimensions

HxWxD

(mm)

12 6SE7021-0ES87-0FB0 10*) 2,2 215x90x81

18 6SE7021-8ES87-0FB0 10*) 2,2 215x90x81

36 6SE7023-4ES87-0FB0 25 3,7 245x101x86

80 6SE7027-2ES87-0FB0 50 9,5 308x141x141

120 6SE7031-0ES87-0FA0 50 10 348x171x141

180 6SE7031-8ES87-0FA0 95 13 404x171x141

500 6SE7033-7ES87-0FA0 Connecting

lug

49 590x305x154

1000 6SE7041-0ES87-0FA0 Connectinglug

90 840x465x204

1600 6SE7041-6ES87-0FA0 Connectinglug

130 870x465x204

*) The filters generate discharge currents. VDE 0160 specifies a protective conductor connection with10 mm.

For converter units for 3-phase supplies, the line current (filter current) is equal to theDC current x 0.82.For converters for two-phase supplies, two phases are connected to the three-phase filter. In this case,the line supply current is the same as the DC current.

Important technical data of the radio interference protection filter:

Rated supply voltage 3-ph 380-460 V (+/- 15%)

Rated frequency 50/60 Hz (+/- 6%)

Operating temperature 0C to +40C

Degree of protection IP20 (EN60529)

IP00 500 A

Refer to the Instruction Manual for further technical data on the filters:

SIMOVERT Master Drives radio interference suppression filter, EMC filter,Order No.: 6SE7087-6CX87-0FB0.


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16.3 Information on line-side harmonics generated by converters in a fully-controlled three-phase bridge circuit configuration B6C and (B6)A(B6)C

Converter for the medium power range usually consists of fully-controlled three-phase bridge circuitconfigurations. An example of the harmonics generated by a typical system configuration for two firing

angles (= 20 and = 60) is subsequently shown.The values have been taken from an earlier publication, and more specifically from Harmonics in theline-side current of six-pulse line-commutated converters from H. Arremann and G. Mltgen, Siemens

Forsch.- u. Entwickl.-Ber. Bd. 7 (1978) Nr. 2, Springer-Verlag 1978.

Formulas and equations were specified with which the short-circuit rating SKand the armature

inductance Lacould be determined dependent on the specific operating data (line supply voltage (no-

load voltageVv0), line frequency fNand DC current Id]; this would then be valid for the specified

harmonic spectrum. A dedicated calculation is required if the actual system fault level and/or the actualarmature inductance deviate from the calculated values.

The specified harmonic spectrum is obtained, if the values for the system fault level SKat the

converter supply point and armature inductance Laof the motor, calculated using the following

formulas, are the same as the actual plant values. The harmonics must be separately calculated if thevalues differ.

a.) = 20 b.) = 60Basic fundamental g= 0,962 Basic fundamental g= 0,953

I/I1 I/I1 I/I1 I/I1

5 0,235 29 0,018 5 0,283 29 0,026

7 0,100 31 0,016 7 0,050 31 0,019

11 0,083 35 0,011 11 0,089 35 0,020

13 0,056 37 0,010 13 0,038 37 0,01617 0,046 41 0,006 17 0,050 41 0,016

19 0,035 43 0,006 19 0,029 43 0,013

23 0,028 47 0,003 23 0,034 47 0,013

25 0,024 49 0,003 25 0,023 49 0,011

The basic fundamental current I1is calculated using the following formula as reference quantity

I I1 d0,817= g

with Id DC current at the operating point being investigated

with g Harmonic content (refer above)

The harmonic currents calculated from the above tables, are onlyvalid for

I.) System fault level SKat the converter supply connection point

SU

XKv 0

2

N

VA=


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with

( )X X XU

f LN K D

v 0

dN D

,= = 003536 2I

and

Uv0 No-load voltage at the converter supply connection point in V

Id DC current in A at the operating point to be investigated

fN Line frequency in Hz

LD Inductance of the commutating reactor in H

II.) Armature inductance La

( )L U

fa

v0

N

, H=

00488Id

A separate calculation is required if the actual system fault level SKand/or the armature

inductance Ladeviate from the values calculated using the above formula.

Example

A drive has the following data:

Uv0= 400 V

Id= 150 A

fN= 50 HzLD= 0,169 mH (4EU2421-7AA10 with ILn= 125 A)

With

XN , , ,= =003536

400

1502 50 0169 10 004123

provides the following system fault level at the converter connecting point

SK,

, MVA= =400

00412388

2

and the following motor armature inductance which is required.

La , , mH=

=00488400

50 1502 60

The harmonic currents I, which can be taken from the tables (with I1= gx 0.817 x Idfor firing angles

= 20 and = 60) are onlyvalid for the calculated values SKand La. A separate calculation is

required if the values differ.

When dimensioning/designing filters and compensation circuits with reactors, the thus determinedharmonic values can only be used if the calculated values for SKand Laare the same as the actualdrive values. For all other case, a separate calculation must be made (this is especially true whenusing compensated motors, as these motors have a very low armature inductance).


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