SDCS-02 CONSTRUCTION STANDARD FOR

Transcription

1 الشركة السعودية للكهرباء DATE: November 2016 CONSTRUCTION STANDARD FOR UNDERGROUND DISTRIBUTION NETWORK This specification is property of SEC and subject to change or modification without any notice

2 الشركة السعودية للكهرباء PART 10 INSTALLATION OF 13.8 & 33 KV METERED RING MAIN UNIT SF6 ROOM SUBSTATIONS Page 2 of 10

3 الشركة السعودية للكهرباء TABLE OF CONTENTS Sr. No. DESCRIPTION 13.8/33 KV METERED RING MAIN UNIT SF6 ROOM PAGE NO. 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 3 of 10

4 الشركة السعودية للكهرباء 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: The minimum inner dimensions of the room shall be mm x mm to install Meter Ring Main Unit into on RMU s inside the room Room should be easily accessible without any obstruction 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: 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 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 All door hinges and its fixing bolts & nuts shall be concealed and made of rigid material Locking shall be as follows: Handle shall be high grade stainless steel. Page 4 of 10

5 الشركة السعودية للكهرباء Shall be operated by Central handle lock by using SEC standard key or pad lock according to SEC specification SEC latest revision The door shall be made of steel 2mm wide and 3498mm high excluding the door frame Ventilation louvers shall be shall be provided as shown in figure Door shall be bonded to any metal framework by a bolted removable 35 mm 2 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: Reinforced Concrete Cable Trench 15cm thick shall be provided in the room as shown in figure 1 & 2. The Trench shall be mm wide and mm deep as covered by removable Checkered steel plate Steel reinforcement 10mm diameter 20cm C/C on both directions to be provided as reinforcement for concrete trench walls and bottom Steel angel LS to be fixed on the Concrete trench edge Lean Concrete 10cm thick to be placed under the trench 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 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) 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. Page 5 of 10

6 B 6 2 A 5 4 COMPRESSION CONNECTOR 70mm sq. Ground Conductor 2xmm WINDOW WITH VENTILATION CABLE TRENCH DEPTH mm COVERED BY 8mm THICKNESS TRENCH COVER R181 G 2xmm DOOR OPENING 4-6"Ø PVC PIPE COVERED BY END CAPS HIGH VOLTAGE ROOM CABLE TRENCH DEPTH mm COVERED BY 8mm THICKNESS TRENCH COVER 4-6"Ø PVC PIPE COVERED BY END CAPS R181 M.R.M.U GROUND ROD AT EACH CORNER (COPPERWELD, 16mm DIA.) CABLE SCREEN G R181 COMPRESSION CONNECTOR 4 5 A C 5 6 FIG: / 33KV METERED RING MAIN UNIT (SF-6) ROOM SIZE mm x mm

7 LIFTING HOOK ALL PIECES CUT TO EQUAL LENGTH TRENCH COVER TRENCH COVER 8mm THICK (STEEL) SECTION C FIG 2: CABLE TRENCH & COVER

8 0 x mm FULLY LOUVERED DOOR 2mm FLY MESH IN ALUMINUM FRAME ASHPALT LEVEL 0.00 METER BOX FINISH FLOOR LEVEL x mm STEEL WINDOW ASHPALT LEVEL Compacted Backfill ASHPALT LEVEL 0.00 ASHPALT LEVEL STEP-UP Compacted Backfill Compacted Backfill FRONT ELEVATION SECTION A-A SECTION B-B SCALE 1:100 SCALE 1:100 SCALE 1:100 LED LAMP LIGHT 1 ASHPALT LEVEL ASHPALT LEVEL x mm WINDOW WITH STEEL FLY MESH 1 2 STEP-UP Compacted Backfill FIG: 3 ELEVATION & SECTION LED LAMP LIGHT 2xmm DOOR OPENING xmm EXHAUST FAN WITH OUTSIDE LOUVERS xmm EXHAUST FAN WITH OUTSIDE LOUVERS FIG: 4 LIGHTING ARRANGEMENT SCALE 1:100

9 10x10x1 ANGULAR BAR (DOOR FRAME) 2mm GAP 2mm FLY MESH IN ALUMINUM FRAME mm GAP PLAN 2mm GAP 4-20cm HINGES 2 10x10x1 ANGULAR BAR DOOR FRAME mm THK. LOUVERS IN ALUMINUM FRAME 50x5mm STEEL SIRIP 2mm FLY MESH 2mm LOUVER 2 PLAN ANGULAR BAR 50x50x5mm 2mm LOUVER 50x5mm STEEL SIRIP mm FLY MESH IN ALUMINUM FRAME FRONT VIEW 2mm GAP SECTION E-E FIG: 6 WINDOWS DETAILS SCALE 1:50 2 FRONT VIEW SECTION D-D FIG: 5 DOOR DETAILS SCALE 1:50

10 C.C. Z1 F1 TB2 F1 C.C. Y1 TB1 F1 TB2 F1 TB1 2-14mmØ (TYPICAL) 2-14mmØ C.C. Z FIG: 7 FOUNDATION PLAN 2-14mmØ (TYPICAL) 2-14mmØ C.C. Y cm THK. LEAN CONCRETE TIE BEAM (TB2) Z1 SECTION Z1-Z1 10cm THK. LEAN CONCRETE PLAN (F1/) mmØ BOTHWAYS 8-14mmØ 8-14mmØ TIES 150mm C.C. TIES 150mm C.C. 300 ELEV ± mmØ BOTHWAYS 10cm THK. LEAN CONCRETE DATE: September 2016G GROUND ROD AT EACH CORNER (COPPERWELD, 16mm DIA.) 10cm THK. LEAN CONCRETE Y1 TIE BEAM (TB1) FIG: 9 TIE BEAMS DETAIL 10cm THK. LEAN CONCRETE SECTION Y1-Y1 6-10mmØ (TOP) BOTHWAYS 4-14mmØ 100 Depth Varies as per site B 5-14mmØ Z ROOF BEAM (RB2) SECTION Z-Z SECTION X-X (F1/) FIG: 11 COLUMN AND FOOTING DETAIL RB2 6-/10mmØ 4-14mmØ A RB2 4-12mmØ /m FIG: 10 ROOF BEAMS DETAIL 5-14mmØ Y ROOF BEAM (RB1) 6-12mmØ /m 4-12mmØ /m RB2 SECTION Y-Y SPECIAL NOTE: REINFORCEMENT COVER WITHIN CONCRETE SHALL BE: SLABS-20mm FOOTINGS-75mm COLUMNS :-40mm OTHERS-40mm B FIG: 8 ROOF SLAB PLAN RB1 /m 4-12mmØ 4-12mmØ /m 6-12mmØ /m /m 4-12mmØ 6-12mmØ /m Alternate bend up bars /m 6-12mmØ /m 4-12mmØ /m (TYPICAL) RB1 A RB2 4-12mmØ /m SECTION B-B 4-12mmØ /m mmØ /m RB1 RB1 SECTION A-A