addc guidelines for energy meter installation · 2019-02-12 · 6.2.19 all the pvc (standard) boxes...

ADDC Guidelines for Energy Meter Installation

GL.CSD.01

Effective Date : 02/09/2018

Guideline No : GL.CSD.01 - 1 -

Issue 02 Revision 00

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Approved by: CSD Director

This Document is the property of ADDC, and cannot be used nor given to outside party without prior authorization. Print outs from soft copies are Uncontrolled, unless stamped in red as “Controlled Copy”



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Contents:-

1. PURPOSE 4

2. SCOPE 4

3. DEFINITIONS AND TERMINOLOGY 4

4. REFERENCE 5

5. RESPONSIBILITIES 5

6. PROCESS / GUIDELINES 6

6.1 INSPECTION 6

6.2 MATERIAL REQUIRED/ INSTALLATION 6

6.3 CT OPERATED (LV) METERING 7

6.4 CT VT OPERATED (HV) METERING 8

7 METER CABINET DIMENSION 10

8 TEMPORARY CONNECTION REQUIREMENTS 11

8.1 UP TO 50KW 11

8.2 LOAD GREATER THAN 50 KW (CT METERS) 12

8.3 FOUNDATION FOR TEMP METER ENCLOSURE 13

9 GRP METER CABINET AND FOUNDATION FOR PUBLIC AREA METER INSTALLATION 13

10 QUICK REFERENCE 17

11 RSB METERING REQUIREMENTS AND REGULATIONS 17

11.1 METER EQUIPMENT ACCURACY 17

11.2 MAIN & CHECK REQUIREMENTS 18

12 ILLUSTRATIONS 18


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AMENDMENTS SHEET

ISSUE/ REV. #

PAGE NUMBER

SUBJECT OF THE AMENDMENT APPROVED BY DATE

01/00 All

First Issue

CSD Director 1-01-2017

02/00 13 GRP METER CABINET AND FOUNDATION FOR PUBLIC AREA

METER INSTALLATION

CSD Director 2-09-2018


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1. PURPOSE

The purpose of this guidelines is to provide the simplest and the most efficient process to assess and finalize energy meter installation request, in accordance with the targets set by ADDC.

2. SCOPE

The scope of this guidelines is to provide and ensure that all energy meter installation requirements are accepted for install meter as per ADDC regulation, and follow up the snag list

3. DEFINITIONS AND TERMINOLOGY

The following terminologies are used through this guidelines :

ADDC : Abu Dhabi Distribution Company DoE : Department of Energy RSB : Regulation and Supervision Bureau. SLD : Single Line Diagram LDN : Load Demand Notification FA : Field Activity MIM : Meter installation and Maintenance CT : Current Transformer VT : Voltage Transformer CBCT : Core Balancing Current Transformer AMR : Automated Meter reading MDB : Main Distribution Board SMDB : Sub Main Distribution Board FDB : Final Distribution Board LVDB : Low Voltage Distribution Board ACB : Air Circuit Breaker MCCB : Moulded Case Circuit Breaker MCB : Miniature Circuit Breaker RCD : Residual Current Device XLPE : Cross-Linked Polyethylene PVC : Polyvinyl Chloride Kwh : Kilo Watt hour MVA : Mega Volt Ampere KVA : Kilo Volt Ampere A : Ampere V : Volt L.V : Low Voltage


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Mm : Millimeter Cm : Centimeter S.T : Shunt Trip coil R.C : Relay Control T.B : Terminal Block GRP : Glass Reinforced Plastic

4. REFERENCE

• ADDC approved single line diagram.

• Guaranteed and Overall Service Standards related to connections.

5. RESPONSIBILITIES

The following table lists the internal and external entities who are owners and contributors to the Energy Meter Installation Guidelines:

Action / Activities

Met

er In

stal

lati

on

& M

ain

ten

ance

Se

ctio

n

Cu

sto

mer

Ser

vice

Sec

tio

n

Lice

nse

d E

lect

rica

l Co

ntr

acto

r

Carry the internal wiring for meter installations &provision as per ADDC and DoE (RSB) regulations

A/R N/A R/A

Inspect the site as per Meter Inspection FA and provide snag list to electric contractor

R/A A A/R

Open Meter install request and create the bill for meters supply

R A/R R

Review application, assign work to technicians

A/R R R

Physical meter installation& Testing A/R N/A R/A

A : Accountable, R : Responsible, C : Consulted, I : Informed, N/A : Not Applicable.

Action owner


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6. PROCESS / GUIDELINES

6.1 INSPECTION

6.1.1 Metering network has to be pre-inspected either in parallel with the LV inspection or prior to the meter installation.

6.1.2 During the metering network inspection, contractor's presence at site is essential.

6.1.3 Permanent and finalized premise identification number must be labelled on all premises.

6.2 MATERIAL REQUIRED/ INSTALLATION

6.2.1 GRP meter cabinet with IP66 and IP65 standard must be used for installation. I.e. outdoor and main LV room installation in high rise building.

6.2.2 For Villas and restricted buildings, the meters should be outside on boundary wall to access easily for the meter readers and maintenance team.

6.2.3 Meters are not allowed inside the shop, should be in electrical room.(New Meter connections or old meters for upgrade/ Shifting etc.)

6.2.4 18 mm Marine plywood or Fire rated plywood required for foundation of meter installation inside the meter cabinet. (Metal or mica sheet not allowed).

6.2.5 Spacer must be provided between marine plywood and meter cabinet base.

6.2.6 The height of metering board or meter cabinet must be kept at least 80cms from the ground. i.e. distance between meter board till ground level

6.2.7 Maximum height of Metering board or meter cabinet should not exceed 200cm.

6.2.8 10 cm clearance is required between the meter board and mounted wall (all the sides should be covered)

6.2.9 Metering board must be mounted properly with C- channel or thread bar for typical meter installation.

6.2.10 Required flush mounted installation of cabinet for outdoor installation.

6.2.11 Both ends of metering cables must be with glands. i.e. panel and meter cabinet.

6.2.12 All spare breakers and future load in MDB and SMDB must be pad locked

6.2.13 If more than 1 meter is fixed on a metering board – There must be 10cm space vertically and 15cm space horizontally between the meters.

6.2.14 If the cable size is 16mm2 or below, the minimum space between the cable entry and the meter base must be 15cms.


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6.2.15 If the cable size is 25mm2, the minimum gap between the cable entry and the meter base should be 20cms.

6.2.16 More than six direct meters are not allowed in at one meter board (120cmm X 120cm) for maintenance purpose.

6.2.17 Permanent and finalized premise identification number must be labelled on all premises (meter side, breaker side, premises, cables and FDB).

6.2.18 For AMR system, color coded cables (R-Y-B-N-E) connected from main incomer of each MDB to be provided with 10 A MCB in the control cabinet and same colour coded wires are to be laid from MCB to a PVC(standard) box (300x300“ mm) mounted beside the meter. There should be a C clamp channel and connectors inside the PVC box.

6.2.19 All the PVC (standard) boxes mounted beside the meter for AMR system in each floor of the building (as mentioned above 6.2.18) to be looped with PVC Conduit from floor to floor and finally at Main Electric room.

6.2.20 Control wire with a size 4CX 0.75sqmm also should be provided through these PVC pipes in between floor to floor. Any other type of such cast iron pipes, flexible GI Pipes, normal flexible pipe etc. Would not be allowed to use expect PVC Conduit.

6.2.21 For AMR control cable conduit with 2YY 3 x 0.25sqmm Lapp cable must be provided from energy meter room to water meter room.

6.2.22 In cases were Check water meter has been installed, a continuity cable should be provided from the check meter to the main electric room.

6.2.23 For ESTIDAMA and BMS meters, should be connected only after the tariff meters.

6.2.24 For BMS system the connection from ADDC tariff meter not allowed.

6.2.25 Assistance and approval will be provided by Metering section in case of PV installation.

6.3 CT OPERATED (LV) METERING

CT - Current Transformer

6.3.1 MCCB up to 630Amps for CT operated meters must have shunt trip facility and two single core (2.5mm) control cables is to be laid from MCCB to metering cabinet.

6.3.2 A control supply should be available with separate MCB and suitable connection block to operate the Shunt coils for individual breakers for multiple meters connected to the premises.

6.3.3 CT’s burden and accuracy should comply with the RSB regulations.

6.3.4 CT must be dedicated for tariff metering no other connections allowed with metering CT.

6.3.5 Rating of CT coils for main meters should be same as per ACB and transformer rating (Main & Check and Pilot Meter)


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6.3.6 Armored cable should be used for C.T. Meters

6.3.7 If the required load is more than 1MVA, provisions should be made to install a check meter.

6.3.8 Pilot meter (bulk meter) provision should be provided, If one MDB fed to individual metering with different Service Points (with meter cabinet )

6.3.9 Energy meters from different transformers / MDB / SMDBs should not be allowed in one meter cabinet.

6.3.10 1x12core 4mm2 XLPE or (3 x 4C x 4mm XLPE) cable is to be provided for all CT operated meter’s wiring with identification ferrules.

6.3.11 1x12core 4mm2 XLPE with 1x4C x 4mm XLPE or (4 x 4C x 4mm XLPE) cable is to be provided for all CT operated Main meter and check meter’s wiring with identification ferrules.

6.3.12 1x19 core 4mm2 XLPE or (4 x 4C x 4mm XLPE) or 1X12core 4mm2 XLPE with 1x4C x 4mm XLPE cable is to be provided for Main & check meters.

6.3.13 For large Service Points, where CT s installed inside MDB in high rise building, a cabinet should be provided inside the electrical room for the billing and check meters.

6.3.14 For Bulk load, CT&VT terminal (suitable 14nos TB for Main and check) should be provided at Main Incomer compartment/Section with sealable Enclosure.

6.3.15 Metering cables both ends must be gland. i.e. panel and meter cabinet with Gland sheet.

6.3.16 Lockable fuse carriers or protection breakers Should be provided for the potential ( in between source of supply and meter)

6.3.17 Boot legs are required to terminate the CT operated metering connection.

6.3.18 Meter cabinet and all other requirements. As mentioned in section 7 and 11.

6.3.19 Contractor should carryout dressing all cables with suitable wire legs and covered by cable spirals.

6.3.20 CT coils should be in accessible and visible area.

6.3.21 CT coils location in cubicle /compartment in MDB to be marked in the panel with identification

6.4 CT VT OPERATED (HV) METERING

CT- Current Transformer

VT- Voltage Transformer

6.4.1 Contractor submits their LDN, SLD and complete switch gear drawing to the metering section prior to the first inspection.

6.4.2 The site inspection must be conducted in the presence of contractor and switch gear engineers.

6.4.3 CT’s burden and accuracy should comply with the RSB regulations.


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6.4.4 4 x 4C x 4mm XLPE or 1 x 19C X4mm XLPE cable should be used for metering. As mentioned in 6.3.9 to 6.3.11

6.4.5 Separate MCB’s rated 6 Amps required for each main and check meters VT connection 6.4.6 Main metering CT core must be dedicated for tariff metering. 6.4.7 Identification of CT and VT terminals should be same as shown in the As-built drawings. 6.4.8 Meter cabinet and all other requirements. See no. 6.2.1 to 6.2.9. 6.4.9 Color coded 1 x 4C x 2.5 mm cable provided from LV DB (10 Amps MCB) for AMR 6.4.10 After the meter installation, contractor should arrange for primary injection test in the

presence of ADDC metering Dept.

CT Operated (LV) Main & Check Metering Diagram


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7 METER CABINET DIMENSION

Meter Type No. of meter Height(mm) Width(mm) Depth(mm) View glass

CT meter 1 500 405 250 1

CT meter 2 665 560 255 2

Single CT meter (500X405X250mm)

Double CT or Direct meter (665x560X255mm)

4 X direct meter (1200X600X250mm)

4 X CT meter

(850X650X270mm)

Single Direct meter with cut outer (665x560X255mm)


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CT meter >2 850 650 270 4

Direct meter 1 665 560 255 1

Direct meter 2 665 560 255 2

Direct meter >2 1200 600 250 4

8 TEMPORARY CONNECTION REQUIREMENTS

8.1 UP TO 50KW

➢ GRP box- 2 box- 800mmx650mmx300mm ➢ GRP box- 1 box- 1000mmx1000mmx300mm ➢ GI Gland plate required at Bottom side for cable gland ➢ Water proof + weather proof & canopy ➢ Earth pit should be provided.

Number of Boxes Height(mm) Width (mm) Depth(mm)


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Using 2 boxes 800 650 300

Using 1 box 1000 1000 300

8.2 LOAD GREATER THAN 50 KW (CT METERS)

➢ GRP box- 1Box-1200mmx1000mmx350mm- FOR DB ➢ GRP box- 1Box-800mmx650mmx300mm - FOR METER ➢ GI Gland plate required at Bottom side for cable gland ➢ Box should be Water proof + weather proof & canopy ➢ All outgoing should be though RCD with FDB ➢ Earth pit should be provided

Number of Boxes Height(mm) Width (mm) Depth(mm)


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Using DB boxes 1200 1000 350

Using Meter box 800 650 300

8.3 FOUNDATION FOR TEMP METER ENCLOSURE

➢ 40 cm height from Ground level ➢ Boxes must fix in foundation with GI fix bolt

9 GRP METER CABINET AND FOUNDATION FOR PUBLIC AREA METER INSTALLATION

➢ In the outdoor meter installation such as street light, Bus shelters, traffic light and monitoring cameras, separate GRP meter cabinet with concrete foundation shall be provided.

➢ Foundation should be min 40cm height from the ground level.

➢ Minimum 120cm height shall be provided from ground level up to meter viewing Perspex.

➢ A Cut-out is to be provided before the meter inside the meter cabinet (Substation /garden /beach /public toilet etc.).


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➢ Not allowed to connect main cable directly to the meter without isolation point (MCCB/ Isolator). ➢ Meter location not permitted on Centre median in all cases.


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10 QUICK REFERENCE

Size of Max

Length Burden CT

Type of Meter Cable to meter

of Cable (Mts) C.T Ratio VA Accuracy Load in KW

100 / 5 A - CT meter 4 mm2 13 100 / 5 A 5 0.5 Maximum 55 KW






2000 / 5 A - CT meter 4 mm2 42 2000 / 5 A 15 0.2 Above 800 KW

2500 / 5 A - CT meter 4 mm2 42 2500 / 5 A 15 0.2 Special cases

3000 / 5 A - CT meter 4 mm2 42 3000 / 5 A 15 0.2 Special cases

4000 / 5 A - CT meter 4 mm2 42 4000 / 5A 15 0.2 Special cases

1 Phase Direct Meter Maximum size of cable 25mm2 Maximum 9 KW

3 Phase Direct Meter Maximum size of cable 25mm2 Maximum 52 KW

2000 / 5 A ACB rating up to 2000 A Transformer 1500 kVA

2500 / 5 A If ACB rating 2500 A Transformer 1500 kVA

3000 / 5 A ACB rating up to 3000 A Transformer 2000 kVA

4000 / 5 A If ACB rating 4000 A Transformer 2000 kVA

4000 / 5A If ACB rating 4000 A Transformer 2500 kVA

11 RSB METERING REQUIREMENTS AND REGULATIONS

11.1 METER EQUIPMENT ACCURACY

SL No: Circuit Capacity

Meters

Measurement Transformers

KWh

KVarh

Current

Voltage

1 Greater than 100 MVA

0.2 S 2.0 0.2 S 0.2

2 Greater than 10 MVA up to 100 MVA

0.2 S 2.0 0.2 S 0.2


0.5 S 3.0 0.2 0.5

4 Greater than 100 KVA up to 1 MVA

1.0 3.0 0.5 0.5

5 Less than 100 KVA

2.0 3.0 0.5 N/A


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11.2 MAIN & CHECK REQUIREMENTS

SL No: Circuit Capacity

Meters

Measurement Transformers

KWh

KVarh

Current

Voltage

1 Greater than 100 MVA Main & Check Main & Check Main & Check Main & Check


Main & Check Main & Check Main & Check Main


Main & Check Main Main Main

4 Greater than 100 KVA up to 1 MVA

Main Main Main Main

5 Less than 100 KVA Main Main Main Main

For more information, please visit : http://rsb.gov.ae/publications

12 ILLUSTRATIONS

Individual Meters for apartments

Ground level

601

603

605

607

602

604

606

608

Spare Spare

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

0000 kWh

3X 100A

Flat 601

Flat 602

Flat 603

Flat 604

Flat 608

Flat 607

Flat 606

Flat 605

80 CM

200 CM5 CM

15 CM

5 CM

As per Article 2.11, 2.12

10 CM

Mounted Wall

55 CM

55 CM

Threaded Bar

80 CM

Ground level

http://rsb.gov.ae/publications


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AMR - Bridge box located on the wall in the main electrical room

Water meters located in a water meter cabinet

Enclosures at Main Electrical Room


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Typical installation - new and existing low-rise buildings (Commercial villas)

( 3 core meter data cable 0.25 mm ² from Water meter box to Energy meter Box)

Shunt Trip Connection with ELR


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Shunt Trip Connection without ELR


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Shunt Trip Connections on Multiple Outgoing Meters

addc guidelines for energy meter installation · 2019-02-12 · 6.2.19 all the pvc (standard) boxes...

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