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
‫الشركة السعودية للكهرباء‬
Saudi Electricity Company
SEC DISTRIBUTION CONSTRUCTION STANDARD
SDCS-02
DATE: November 2016G
PART 10
INSTALLATION
OF
13.8 & 33 KV
METERED RING MAIN UNIT
SF6 ROOM SUBSTATIONS
Page 2 of 10
‫الشركة السعودية للكهرباء‬
Saudi Electricity Company
SEC DISTRIBUTION CONSTRUCTION STANDARD
SDCS-02
DATE: November 2016G
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
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
Door Details
Fig.11 Column and foundation detail
10
Page 3 of 10
Saudi Electricity Company
SEC DISTRIBUTION CONSTRUCTION STANDARD
1
‫الشركة السعودية للكهرباء‬
SDCS-02
DATE: November 2016G
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 4 of 10
Saudi Electricity Company
SEC DISTRIBUTION CONSTRUCTION STANDARD
‫الشركة السعودية للكهرباء‬
SDCS-02
DATE: November 2016G
 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
Fig.3
Fig.5
Fig.7
Fig.9
Fig.11
Meter Room
Fig.2 Cable trench & Cover
Front elevation
Fig.4 Lighting arrangement
Door Details.
Fig.6 Window Details
Foundation Plan
Fig.8 Roof Slab Plan
Tie Beam Detail
Fig.10 Roof Beams detail
Column and foundation detail.
Page 5 of 10
Saudi Electricity Company
SDCS-02
SEC DISTRIBUTION CONSTRUCTION STANDARD
DATE: November 2016G
B
6200
5000
200
450
GROUND ROD AT EACH CORNER
(COPPERWELD, 16mm DIA.)
81
R1
600
G
M.R.M.U
COMPRESSION
CONNECTOR
CABLE SCREEN
G
81
R1
A
CABLE TRENCH DEPTH 1300mm
COVERED BY 8mm THICKNESS
TRENCH COVER
HIGH VOLTAGE ROOM
C
450
4000
150
2500x3500mm DOOR OPENING
400
4400
CABLE TRENCH DEPTH 1300mm
COVERED BY 8mm THICKNESS
TRENCH COVER
3500
200
A
600
81
70mm sq.
Ground Conductor
600
R1
150
4000
1000
600
COVERED BY END CAPS
COVERED BY END CAPS
200
400
200
1250
200
2500
1250
5400
6200
FIG: 1 - 13.8 / 33KV METERED RING MAIN UNIT (SF-6)
ROOM SIZE 5000mm x 4000mm
5200
400
200
2400x1000mm WINDOW WITH VENTILATION
COMPRESSION
CONNECTOR
5200
400
1300
400
2400
1300
200
200
4400
400
200
400
TRENCH COVER
10
8
TRENCH COVER 8mm THICK
(STEEL)
FIG 2: CABLE TRENCH & COVER
25
650
ALL PIECES CUT
TO EQUAL LENGTH
LIFTING HOOK
SEC DISTRIBUTION CONSTRUCTION STANDARD
1300
SECTION C
600
650
Saudi Electricity Company
SDCS-02
DATE: November 2016G
3500
ASHPALT LEVEL 0.00
METER
BOX
600
3500
SCALE
1:100
FRONT ELEVATION
2 STEP-UP
Compacted Backfill
2500
600
500
1300
1500
1300
ASHPALT LEVEL 0.00
500
1450
500
1450
ASHPALT LEVEL 0.00
2400
400
400
2500x3500mm DOOR OPENING
LED LAMP LIGHT
500x500mm EXHAUST FAN
WITH OUTSIDE LOUVERS
1:100
FIG: 4 LIGHTING ARRANGEMENT
500x500mm EXHAUST FAN
WITH OUTSIDE LOUVERS
LED LAMP LIGHT
5000
FIG: 3 ELEVATION & SECTION
1:100
1:100
SCALE
Compacted Backfill
SECTION B-B
400
Compacted Backfill
4000
2000 x 3500mm
FULLY LOUVERED DOOR
2mm FLY MESH IN
ALUMINUM FRAME
SCALE
ASHPALT LEVEL 0.00
2400 x 1000mm
STEEL WINDOW
1400
1200
3500
ASHPALT LEVEL 0.00
FINISH FLOOR LEVEL +50
SEC DISTRIBUTION CONSTRUCTION STANDARD
SCALE
ASHPALT LEVEL 0.00
400
3600
SECTION A-A
600
600
2 STEP-UP
Compacted Backfill
2400 x 1000mm
WINDOW WITH STEEL FLY MESH
1300
400
1000
1300
3500
500
1450
500
1450
3600
500
400
4000
1250
150
1250
Saudi Electricity Company
SDCS-02
DATE: November 2016G
100
500
400
Saudi Electricity Company
SDCS-02
SEC DISTRIBUTION CONSTRUCTION STANDARD
200
10x10x1 ANGULAR
BAR (DOOR FRAME)
200
200
200
2mm FLY MESH IN ALUMINUM FRAME
2336
2mm GAP
DATE: November 2016G
2mm GAP
2mm GAP
PLAN
2500
200
10x10x1 ANGULAR
BAR DOOR FRAME
80
80
4-20cm HINGES
2400
80
2
IN ALUMINUM FRAME
50x5mm STEEL SIRIP
2mm FLY MESH
2mm LOUVER
1350
2mm THK.
LOUVERS
ANGULAR BAR
50x50x5mm
PLAN
2mm LOUVER
SECTION E-E
2500
SECTION D-D
FRONT VIEW
FIG: 5 DOOR DETAILS
SCALE
1:50
50
1000
2mm FLY MESH
IN ALUMINUM FRAME
1000
1200
2mm GAP
1300
646
1000
3500
3498
50
50x5mm STEEL SIRIP
50
2400
50
FRONT VIEW
FIG: 6 WINDOWS DETAILS
SCALE
1:50
1400
A
F1
TB1
C1
400 200
1200
C1
1400
400 200
RB1
1200
1200
450
450
1200
TB2
TB2
1400
1200
B
RB2
5000
B
SCALE:
/m
1000
(TYPICAL)
NTS
F1
NTS
C1
1200
200 400
A
GROUND ROD AT EACH CORNER
(COPPERWELD, 16mm DIA.)
200 400
1200
C1
1400
TB1
F1
150
400
C1
200
C1
200
400
20
200
RB1
20
400
450
C1
150
200
C1
450
1200
1000
200
RB2
1000
TIE BEAM (TB1)
3500
Y
1000
1200
SCALE:
4000
5000
NTS
SCALE:
NTS
SECTION A-A
SCALE:
SECTION B-B
NTS
FIG: 10 ROOF BEAMS DETAIL
ROOF BEAM (RB1)
3500
@150mm C.C.
200
1200
C1
400
C1
450
C1
200
Z
Z
450
5000
Y
Y1
ROOF BEAM (RB2)
@150mm C.C.
NTS
FIG: 9 TIE BEAMS DETAIL
SCALE:
Y1
C1
TIE BEAM (TB2)
@150mm C.C.
200
Z1
5000
10cm THK. LEAN CONCRETE
10cm THK. LEAN CONCRETE
200
10cm THK. LEAN CONCRETE
1200
400
200
RB2
400
SCALE:
200
RB1
400
SECTION Y-Y
200
SECTION Z-Z
200
Depth Varies
as per site
1400
1200
300
@ 150mm C.C.
@ 150mm C.C.
10cm THK. LEAN CONCRETE
SECTION X-X (F1/C1)
300
1050
200
PLAN (F1/C1)
120
200
1400
370
1200
SPECIAL NOTE:
REINFORCEMENT COVER WITHIN CONCRETE SHALL BE:
SLABS-20mm FOOTINGS-75mm COLUMNS :-40mm OTHERS-40mm
NTS
FIG: 11 COLUMN AND FOOTING DETAIL
10cm THK. LEAN CONCRETE
SECTION Y1-Y1
200
SECTION Z1-Z1
1400
100
Z1
SEC DISTRIBUTION CONSTRUCTION STANDARD
FIG: 8 ROOF SLAB PLAN
/m
RB2
SCALE:
FIG: 7 FOUNDATION PLAN
5000
Alternate bend up bars /m
F1
RB1
1400
200 400
4000
400 200
450
3500
1200
450
450
500
500
1400
120
400
450
500
1400
/m
200 400
4000
400 200
400
300
@150mm C.C.
Saudi Electricity Company
SDCS-02
DATE: September 2016G