PROVISION OF INDEPENDENT 11 KV HT ELECTRIC POWER SUPPLY TO CDA CHENNAI COMPLEX UNDER GE CHENNAI

Amount

BOQ UPLOADED ON 24 Apr 2024

SCH "A" PART-I

Supply, installation, testing and commission of outdoor, non-walk in type 315 KVA compact sub station, type tested 11 KVA/433 volts transformer and HT/LT panels etc., in one out door enclosure (with base frame) conforming to IEC 61330/62271-202, including PCC foundation (as per manufacturers design and specification) complete all as following specifications :-

(A) TRANSFORMER :- Supply, install, test and commissioning of step down Dry type Transformer indoor, hermatically sealed complete with standard accessories or fittings suitable for 11 KV/433 volts (at no load), AC 3 phase, 50 cycles, 4 wire, capacity 315 KVA, double copper wound, naturally air cooled (AN) confirming to ISS-11171 and other IS (all as per latest issue) with latest amendments as on the date of receipt of tender with the following requirements :-

Continuous rating : 315 KVA

No load voltage ratio : 11 KV/433 V

Tapping on LV " +/- 5% in steps of 2.5% for variation of LV

Phase and Frequency : 3 phase & 50 HZ

Vector group : DYN-11

Cooling : Air Natural (AN)

Type : Indoor

BIS marked and BEE 3 star labelled

Maximum total losses at 50% load 955 W and at 100% load 2750 W

Class of Insulation : Class F/H

Terminal arrangement

HV side : Top bushing

LV side : Top/side bushing

Name plate, rating, diagram and danger plate

Two earthing terminals for body and neutral

Externally hand operated off-circuit tap switch with position indicator and locking arrangement device.

Under carriage with four plain rollers

Lifting hooks for transformer

Jacking and lifting lugs for core

Bi-directional lock rollers under earth

Winding temperature indicator

Separate neutral bushing brought out for earthing LV Side

OCTC (off circuit tap changer)

(B) HT SWITCH GEAR :-

11KV SF6 indoor (SF6 insulator with insulated stainless steel enclosure), non-extensible Ring Main Unit compact switch gear consisting of 02 Nos 630 A load break switch modules and 01 Nos 630 A fixed manual vaccum circuit breaker with series trip

Self powered digital micro processor 3 O/C + 1 E/F self powered relay with low and high set for Over current and earth fault, does not requires any external source of power conforming to IS-3232.

Current transformer-Resing cast, ratio : 100/5, Burden 5 VA, class 1.0 conforming to IS-2705.

Potential Transformer Resing Cast, Ratio : 11 KV/110 V conforming to IS-3156.

VCB off/on/auto trip/trip circuit healthy/spring charge indication.

Digital multi functional meter with A,V,KW,KWH,PF,Class-0.5.

All internal wiring to be properly secured with fuse/MCB protection with proper size copper standard FRLS wires and connected with proper colour coding with proper lugs and ferrule.

Manometer-01 No.

(c) LV SWITCH GEAR :-

LT Panel enclosure shall be 2 mm thick CRCA sheet, duly epoxy powder coated to accommodate the following switch gears.

ACB 4 Poles 415 Volts, 800 Amps rating 50 KA rupturing capacity, manual draw out type with microprocessor release complete-01 Nos (Incomer)

Digital multi functional meter with A,V,KW,KWH,PF,Class-0.5.

LT metering CTs, Resing cast type, 1000/5A, Burden 5VA, Class-1.0 conforming to IS-2705.

All internal wiring to be properly secured with fuse/MCB protection with proper size copper standard FRLS wires and connected with proper colour coding with proper lugs and ferrule.

Indicator lamps for RYB, 230 V, protected by MCB 2Amps, 240Volts, SP of 10 KA for each phase-01 set.

(D) INTER CONNECTION AND EARTHING :- Interconnection between HT switch gear and transformer using aluminium un-armoured XLPE cable and interconnection between Transformer and LT switch gear using aluminium busbars. Internal earthing connections by using GI strips. Transformer neutral earthing with copper strips and control wiring with copper strip 25x3mm with hear shrink sleeves colour coding complete all as directed and as approved-01 Set.

(E) OUTDOOR ENCLOSURE : Outdoor type enclosure having construction of galvanised sheet minimum 2mm thick for load bearing member and minimum 1.5 mm thick for non-load bearing member. The enclosure shall have IP-23 for Transformer Compartment and IP-54 degree of protection for HT & LT switchgear compartment. The enclosure exterior shall be epoxy powder coated (Colour Siemen Grey RAL 7035). Each compartment shall be provided with door and padlock arrangement. The compartment illumination lamp with door operated switch shall be provided for HV and LV compartment. The placing of equipments shall as per IEC/IS Standards, such that the space between equipments and compartment wall to be maintained and all equipments/panel should have easy access and minimum specified clearance of space for maintenance and repairs/placement is provided complete all as directed. 01 Set Schematic circuit connection diagram duly laminated and pasted on CSS.

Note :- All conformation to IS shall as per latest version as on last date of bid submission.

Excavating in trenches not exceeding 1.5 meter wide and n. exc. 1.5 meter in depth for foundation for erection of poles, stays, laying pipes, cables, stays etc., and getting out in soft/loose soil all as specified and directed.

Returning, filling in, including spreading, leveling, watering and well ramming in layers not exceeding 25cm in soft/loose soil all as specified and directed.

Removing surplus excavated soil to a distance not exceeding 50m and depositing where directed at a level n. exc, 1.5m above the starting point complete all as specified and directed.

Supply and lay fine sieved excavated dry soil spreading levelling in trenches as cable cushioning all as specified and directed (Punned thickness only shall be measured and paid)

Supply and laying burnt bricks, old size, sub class 'B'. Laid flat adjacent to each other, perpendicular to cable with width equal to length in trenches for protection of cable all as specified and as directed.

Supply and lay GI tube light grade 100 mm bore with all fittings laid in trenches/floor/under road crossing or fixed on wall/pole complete for protection of UG armored electric cables all as specified and as directed. Note : Excavation and earth work required shall be measured and paid separately.

All as per item No. 09 here in before but 80 mm bore.

All as per item No. 09 here in before but 50 mm bore.

Supply, laying and testing cable HT Cable, XLPE insulated screened PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with aluminium conductor, 11000 volts grade cross sectional area 95 sqmm 3 core.

Supply & fix cable jointing kit for 11KV (Earthed) grade cable for outdoor termination cold shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm.

Supply, laying and testing cable LT Cable, XLPE insulated armoured and PVC sheathed galvanised steel strip or wire armoured, electric power cable (heavy duty) 1100 volts grade with stranded aluminium conductor of following sizes complete all as specified and as directed. (for inter connection and extend the existing cables)

(a) 400 Sqmm, 3.5 Core (for CSS to Main panel-01)

(b) 185 Sqmm, 3.5 Core (for Main Panel 1 to Distbn Panel-02&3, APFC)

(c) 95 Sqmm, 3.5 Core (for inter connections with existing LT cables)

(c) 70 Sqmm, 3.5 Core (-do-)

(d) 50 Sqmm, 3.5 Core (-do-)

(f) 25 Sqmm, 4 Core (-do-)

Supply, installation, testing and commissioning factory made out door cubical type LT panel board, weather/dust/vermin proof, totally enclosed, compartmentalised for each switch gears having separate doors inside, fabricated made out of 3.15mm thick MS sheet over MS 50x50x6mm thick angle iron of required type for support, double door both side open type with necessary locking arrangement with slope roof on top duly painted with powder coated sence grey paint complete including PCC 1:3:6 foundation and PCC pillars with suitable size of nut, bolts & washers grouted as required at site including following incoming/outgoing feeders all as specified and as directed :- (Main panel No. 1)

(a) Busbar for 3 phase suitable for 1000Amps capacity made out of copper strip for three phase and neutral, duly colour coded - 01 Set.

(b) MCCB 415 volts, 4 poles, 500 amps, 50KA Cap, Adjustable type - 01 No.

(c) MCCB 415 volts, 4 poles, 250 amps, 36KA Cap, Adjustable type - 03 Nos. (01 Spare)

(d) MCCB 415 volts, 4 poles, 160 amps, 36KA Cap, Adjustable type - 01 No.

(e) Digital multi functional meter with A,V,KW,KWH,PH,Class-0.5.

(f) Indicating lamp LED type. R,Y,B - 01 Set.

Supply, installation, testing and commissioning factory made out door cubical type LT panel board, weather/dust/vermin proof, totally enclosed, compartmentalised for each switch gears having separate doors inside, fabricated made out of 3.15mm thick MS sheet over MS 50x50x6mm thick angle iron of required type for support, double door both side open type with necessary locking arrangement with slope roof on top duly painted with powder coated sence grey paint complete including PCC 1:3:6 foundation and PCC pillars with suitable size of nut, bolts & washers grouted as required at site including following incoming/outgoing feeders all as specified and as directed :- (Panel No. 2 : for CDA Complex, Ameer mahal, CDA Resi & Tech bldg)

(a) Busbar for 3 phase suitable for 500Amps capacity made out of copper strip for three phase and neutral, duly colour coded - 01 Set.

(b) MCCB 415 volts, 4 poles, 250 amps, 36KA Cap, Adjustable type - 01 No.

(c) MCCB 415 volts, 4 poles, 160 amps, 36KA Cap, Adjustable type - 01 No.

(d) MCCB 415 volts, 4 poles, 63 amps, 16KA Cap, (01 No. Spare) - 02 Nos

(e) MCCB 415 volts, 4 poles, 40 amps, 16KA Cap - 01 No.

(f) MCB 415 volts, 4 poles, 16 amps, 16KA Cap - 01 No.

(g) MCB 415 volts, SPN 16 amps, 16KA Cap, for S/Lights - 01 No.

(h) Digital multi functional meter with A,V,KW,KWH,PH,Class-0.5.

(i) Indicating lamp LED type. R,Y,B - 01 Set.

Supply, installation, testing and commissioning factory made out door cubical type LT panel board, weather/dust/vermin proof, totally enclosed, compartmentalised for each switch gears having separate doors inside, fabricated made out of 3.15mm thick MS sheet over MS 50x50x6mm thick angle iron of required type for support, double door both side open type with necessary locking arrangement with slope roof on top duly painted with powder coated sence grey paint complete including PCC 1:3:6 foundation and PCC pillars with suitable size of nut, bolts & washers grouted as required at site including following incoming/outgoing feeders all as specified and as directed :- (Panel No. 3 : for DPDO & Canteen, DPDO/DARC, Old EDP centre & Server centre)

(a) Busbar for 3 phase suitable for 500Amps capacity made out of copper strip for three phase and neutral, duly colour coded - 01 Set.

(b) MCCB 415 volts, 4 poles, 250 amps, 36KA Cap, Adjustable type - 01 No.

(c) MCCB 415 volts, 4 poles, 100 amps, 16KA Cap, Adjustable type - 01 No.

(d) MCCB 415 volts, 4 poles, 63 amps, 16KA Cap - 02 Nos (01 No. Spare)

(e) MCCB 415 volts, 4 poles, 40 amps, 16KA Cap - 01 No.

(f) MCB 415 volts, 4 poles, 32 amps, 16KA Cap - 01 No. (Spare)

(g) MCB 415 volts, SPN 16 amps, 16KA Cap, for S/Lights - 01 No.

(h) Digital multi functional meter with A,V,KW,KWH,PH,Class-0.5.

(i) Indicating lamp LED type. R,Y,B - 01 Set.

Supply, installation, testing and commissioning, Automatic power factor correction (APFC) panel, factory made out door cubical type LT panel board, weather/dust/vermin proof, totally enclosed, compartmentalised for each switch gears having separate doors inside, fabricated made out of 3.15mm thick MS sheet over MS 50x50x6mm thick angle iron of required type for support, double door both side open type with necessary locking arrangement with slope roof on top duly painted with powder coated sence grey paint complete including PCC 1:3:6 foundation and PCC pillars with suitable size of nut, bolts & washers grouted as required at site including following incoming/outgoing feeders all as specified and as directed :-

(a) Automatic power factor correction (APFC) system, 150KVA capacitor bank in 6 stages with micro processer control units, suitable for operation on AC 415 volts, 50Hz supply, including suitable type fuses, relays, LED indicating lamps, LED digital type multifunction meter for V,PF,KWH,KVA,KVAR,KVARH complete internally pre wired with copper conductor cable comprising of following switch gears/capacitors etc, all as directed :-

(i) Capacitors metalized poly propylene heavy duty (MPP-H) for 3 phase, 440V, 50Hz System for permissible non-linear load 15% of 150 KVAR capacity with 6 steps (2x12.5+3x25+1x50)

(ii) MCCB 415 volts, 4 poles, 160 Amps, 36 KA Cap, Adjustable type - 01 No. (Incoming)

(iii) Current transformers, 400/5 Amps - 03 Nos.

(iv) Aluminium busbar, 500 Amps - 01 Set.

Earthing complete with galvanised steel earth plate electrode of size 60cmx60cmx6mm thick buried directly in ground (earth pit not less than 2.5 m deep below the normal ground level) with the top edge of the plate not less than 1.5m below normal ground level connected to GI earth strip 32x6mm dia by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 5 of SSR Part-I connected to machinery/equipments installed power house/sub station all as specified including testing on completion. Note No. 1 the unit rate shall also include for excavation earth work in any type of soil PCC (1:3:6) Type C-1pit RCC 1:2:4 Type B-1 cover reinforced with mm dia CTD bars @ 150mm C/C both ways funnel with 15 mm bore GI watering pipe 20 mm dia bore GI protection pipe wire mesh and copper lugs complete in addition to item No 1(a) to (e) of preamble (Notes) under sub hearing earthing specified on Sl Page No. 389 of SSR Part-II 2004.

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