SDCS-02 CONSTRUCTION STANDARD FOR6 Drawings Fig.1 Meter Room Fig.2 Cable trench & Cover Fig.3 Front elevation Fig.4 Lighting arrangement Fig.5 Door Details. Fig.6 Window Details Fig.7

Saudi Electricity Company الشركة السعودية للكهرباء

SEC DISTRIBUTION CONSTRUCTION STANDARD SDCS-02

DATE: November 2016

SDCS-02

CONSTRUCTION STANDARD

FOR

UNDERGROUND DISTRIBUTION NETWORK

This specification is property of SEC and

subject to change or modification without any notice



DATE: November 2016G

Page 2 of 10

PART 10

INSTALLATION

OF

13.8 & 33 KV

METERED RING MAIN UNIT

SF6 ROOM SUBSTATIONS




Page 3 of 10

TABLE OF CONTENTS

Sr. No. DESCRIPTION PAGE

NO.

13.8/33 KV METERED RING MAIN UNIT SF6 ROOM

1 INTRODUCTION 4

2 SERVICE CONDITIONS AND SERVICE PARAMETERS 4

3 REVISION AND ADDITIONS 4

4 DESIGN OF METER ROOM 4

5 CIVIL CONSTRUCTION REQUIREMENTS 5

6 DRAWINGS 6-10

Fig.1 Meter Room 6

Fig.2 Cable trench & Cover 7

Fig.3 Front elevation Fig.4 Lighting arrangement 8

Fig.5 Door Details Fig.6 Window Details 9

Fig.7 Foundation Plan Fig.8 Roof Slab Plan 10

Fig.9 Tie Beam Detail Fig.10 Roof Beams detail 10

Fig.11 Column and foundation detail 10




Page 4 of 10

1 Introduction

This construction standard specifies the construction design of 13.8 & 33 KV

Metered Ring Main Unit SF6 Room Sub-station. This standard is intended to assist

the field engineers and technicians to achieve unified standard in construction to

ensure a satisfactory and economical level of service without operation restrictions

so that the operational errors are minimized for safety and reliability of the system.

2 Service conditions and system parameters

For construction and installation of Drawings, the service conditions and system

requirements shall be as given in the latest revision of SEC general requirements for

all Equipment/Material specification No. 01-SDMS-01 (latest revision). This SDMS

shall also be read in conjunction with SEC Purchase Order (PO) requirements.

3 Revision and additions.

This construction standard is subject to revision as new material and methods of

construction are developed. The latest revision of existing Drawings shall be

revised if feasible and new drawings needs to be developed involving work

expansion / modification.

4 Design of Meter Room

4.1 The following points are required to be considered at site during the selection of

Metered Ring Main Unit Room Design:

4.1.1 The minimum inner dimensions of the room shall be 5000mm x 4000mm

to install Meter Ring Main Unit into on RMU’s inside the room.

4.1.2 Room should be easily accessible without any obstruction.

4.1.3 Meter Room shall not be located on the top of sewerage system or water

tanks. However, in case if it is not possible to avoid such service the standard

height of the room and trench depth must be maintained (as shown in drawing).

4.2 Door and Cable entry pipes:

4.2.1 Access to the room shall be from the front by means of hinged metal

doors, fitted with a heavy-duty locking device to secure them at closed position

and one stainless steel hasp set for separate SEC standard pad locking.

4.2.2 Door shall be opened to outside the room either to the right or left hand

side. It shall be provided with door stoppers and locking at open position to

protect from swinging in order to protect the energy meter box to be fixed on the

right side of the front wall as well as to avoid accidents.

4.2.3 All door hinges and its fixing bolts & nuts shall be concealed and made of

rigid material.

4.2.4 Locking shall be as follows:

Handle shall be high grade stainless steel.




Page 5 of 10

Shall be operated by Central handle lock by using SEC standard key or pad

lock according to SEC specification SEC-02-02 latest revision.

4.2.5 The door shall be made of steel 2500mm wide and 3498mm high

excluding the door frame.

4.2.6 Ventilation louvers shall be shall be provided as shown in figure 5.

4.2.7 Door shall be bonded to any metal framework by a bolted removable 35

mm2 tinned copper braid.

4.3 For the entry & exit of SEC Cable in to and out of the meter room shall be 4

PVC pipes of 150mm diameter in compliance with latest revision of relevant SEC

Specification shall be provided.

4.4 Reinforced Concrete Cable Trench:

4.4.1 Reinforced Concrete Cable Trench 15cm thick shall be provided in the

room as shown in figure 1 & 2. The Trench shall be 600mm wide and 1300mm

deep as covered by removable Checkered steel plate.

4.4.2 Steel reinforcement 10mm diameter 20cm C/C on both directions to be

provided as reinforcement for concrete trench walls and bottom.

4.4.3 Steel angel LS to be fixed on the Concrete trench edge.

4.4.4 Lean Concrete 10cm thick to be placed under the trench.

4.4.5 The upper edge of the Cable trench shall be 50mm wider than the standard

width of the trench to form a grove of 25x10mm all around the trench for fixing of

the Trench Cover as shown in Fig.2.

4.4.6 Finishing Color

The interior of the meter room shall be adequately protected against

weather changes and painted with pure white Color with a smooth surface finish

as per SEC Specification 01-SDMS-01 latest revision as refer to (Civil Work

Requirements).

4.4.7 The room shall have minimum 2 Lead lamp light as shown in Fig.4.

5 Civil Construction Requirements:

All Civil Work shall be done according to SEC Unified (Civil Work Requirement)

latest revision.

6 Drawings

Fig.1 Meter Room Fig.2 Cable trench & Cover

Fig.3 Front elevation Fig.4 Lighting arrangement

Fig.5 Door Details. Fig.6 Window Details

Fig.7 Foundation Plan Fig.8 Roof Slab Plan

Fig.9 Tie Beam Detail Fig.10 Roof Beams detail

Fig.11 Column and foundation detail.

6200

200

2400 1300

200

4000

200

4400

200 200

2400x1000mm WINDOW WITH VENTILATION

FIG: 1 - 13.8 / 33KV METERED RING MAIN UNIT (SF-6)ROOM SIZE 5000mm x 4000mm

5000400 400

400 400

5400

6200

200

4000

4400

400

5200

400

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1300

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M.R.M.U

GROUND ROD AT EACH CORNER(COPPERWELD, 16mm DIA.)

GG

COMPRESSIONCONNECTOR

CABLE SCREEN

COMPRESSIONCONNECTOR

70mm sq.Ground Conductor

Saudi Electricity Company

SEC DISTRIBUTION CONSTRUCTION STANDARDSDCS-02


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IA.)



DATE: September 2016G

Documents

SDCS-02 CONSTRUCTION STANDARD FOR6 Drawings Fig.1 Meter Room Fig.2 Cable trench & Cover Fig.3 Front elevation Fig.4 Lighting arrangement Fig.5 Door Details. Fig.6 Window Details Fig.7