PROVN OF 11 KV RING MAIN UNIT FOR TRIVENI VIHAR AREA AT NEW CANTT ALLAHABAD UNDER GE (WEST) ALLAHABAD

Amount

Supply, installation and commissioning of 11 KV, 630 A, non extensible outdoor, fixed type (IP 54) RMU (Ring Main Unit) 3-way comprising of 2 Nos 60 Amps, vaccum circuit breaker (comprising two Nos Incomers & 1 No vaccum circuit breaker as outgoing) inside robotically welded stainless steel 304 (Non ferrite Non magnetic grade) tank having min, thickness 3 ± 0.5mm & IP 67 degree protection. RMU should be provided with internal bus bars as well as earthing bus bar should be of copper, one number fault passage indicator per unit pad lock provision & complete with accessories. The RMU shall be type tested for internal arc test of 20 KV/1 Sec as per IEC 62271-220. The earting of cable sheilds. The outer enclosure main door should cover entire part of the switchgear including front cover and cable doors for providing complete IP 54 protection. The unit shall include the following with all necessary standard fitting as required at site:-

(a) 2 Nos Incoming 630 Amps motorised vaccum circuit breaker, triple pole single break 3 position (On, Off and earth having STC capacity 20 KA for 3 seconds with copper bus bar and copper earth bar fitted high fixed type voltage indicator device as per IEC 61958-1 fully rated with earth switch, spring assisted mechanism with built in operating handle, arc proof hinged type cable cover air insulated cable boxes and boots suitable for bottom front entry termination of 3 core cable 95/120/185 Sqmm. (b) 01 No Outgoing 630 Amp motorised vaccum circuit breaker, triple pole single break 3 position (On, Off and earth having STC capacity 20 KA for 3 seconds with copper bus bar and copper earth bar fitted high fixed type voltage indicator device as per IEC 61958-1 fully rated with earth switch, spring assisted mechanism with built in operating handle, arc proof hinged type cable cover air insulated cable boxes and boots suitable for bottom front entry termination of 3 core cable 95/120/185 Sqmm.

(c) Bus connected PT unit-01 No for metering consisting of following :- (i) Type M : Air insulated metering module 12 KV, 630 A 20 KA for 3 Sec. (ii) 3 voltage transformers of the ratio 11 KV/1.732/110 V/1.732.25 VA class 1.0 with HT fuses on primary side and MCB on secondary side. (iii) 3 Digital MFM with 485 port to measure Amps, Volts, Frequency, PF, KWH, KVAR. (iv) 1CFL illumination. (v) 1 Space heater with thermostate. (vi) 1 RYB phase indicator. (vii) 1 Cable support bus bar, stand for 3 way unit, 1 manometer & 1 perating handle. (viii) 1 Set bushing for external bus bar connection along with bus bar cover & sleeved bus bars for coupling. (ix) 2x12 V Battery with battery charger of suitable burden for motor operation. Input 230 V AC & output 24 V DC. (d) Capacitive voltage indicator fixed type VPIS 9-15 KV. (e) Necessary interlocking arrangement for safety and operation. (f) One No operating handle for manual operation. (g) One No Mono meter. (h) Safety interlocks shall be provided as relevand IEC/IS standard and manufactures directions. (j) Above switchgear shall confirm to all relevant IEC/IS standard.

(k) Manual operation of vaccum circuit breaker should be possible without dismantling the motor from RMU. The motor should be fitted in such a way that it should not be required to dismantle during mannual operation. (l) Coupling of RMU and metering module should be with the help of bolted type arrangement so that the coupling at site shall be easy. Plug in type bushing shall not be acceptable. (m) Minimum 3 module should accommodate in one tank to avoid multiple coupling at site. (n) The switchgear shall have built in programming logic using reputed make PLC (ACS500/Equip) for automatic change over between two motorized incomer VCB and shall derive voltage reference from incoming supply in respective incomer. PLC shall also be wired to all VCB's to monitor open/close status. PLC should have communication facility over MODBUS protocol. (o) Three set of remote operation & control kits for motorisation & operation of PLC. (p) The set of signal converter for PLC operation. (q) The auto changeover for incoming feeders shall be done within 10-15 second. (r) The PLC shall programmable at factory as well as site for accommodating future requirements as per manufacturers instruction for auto changeover for feeders. (s) PCC 1:2:4 type B1 using 20mm graded stone aggregate for foundation of RMU as per recommendation of manufacturers & as directed by Engineer-in-Charge. Note :- Any other parts/items not specified above but have been considered essential for smooth and safe functioning of the RMU system shall be included in the items and are covered against the quoted rate.

Supply and fixing cable jointing kit for 11 KV grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 Sqmm to 95 Sq mm complete all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode 600x600x6 mm thick buried directly in ground (earth pit not less than 2.25m deep below GL with top edge of plate not less than 1.50 m below normal ground level) connected to galavanised earth lead strip 32mm x 6 mm (7.5m) as means of bolts, nuts, check nuts and washer besides brazing at all joints as shown on drawings and including excavation, earth work, GI pipe (ISI mark) light grade 40mm bore for protection of GI strip from earth electrode to and including the earth test point, supplying and laying charcoal dust, common salt, PCC 1:3:6, type C-1(using 20 mm graded crushed stone aggregate ) chamber and mild steel angle iron frame 40 x 40 x 3 mm and 40 mm thick pre-cast RCC cover 1:2:4 , type B-1(using 20 mm graded crushed stone aggregate ) reinforced with 8 mm dia TMT bars @ 75 mm C/C both ways with mild steel handle 12 mm dia, PGI funnel and wire mesh, 20 mm dia GI pipe light grade(ISI marked) for watering all as shown in electrical plate No 3 of SSR Part-I and connected to earth test point including testing & taking down of old/ ineffective earthing complete all as specified and directed. (Note:- The rates quoted shall also deemed to include the cost of Earth test point and earth strip and protection pipe upto 7.5 meter beyond the earth plates electrode)

Supply, laying, commissioning and testing cable HT XLPE Insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty) 11000 Volts grade cross sectional area 95 Sq mm 3 core earthed with stranded aluminium conductor complete all as specified and directed .

Excavation in trenches in soft/loose soil n.exc 1.5m wide and .n.exc. 1.5m deep and getting out of laying HT UG cable complete all as specified and directed.

Returning filling in with the soil obtained from item No.05 here-in-before including spreading,levelling and well ramming in layers n. exc. 25cm thick each layer complete all as specified and directed.

Removal of surplus excavated soil to a distance n.exc. 50mtr and depositing where directed at a level n.exc. 1.5 mtr above starting point complete all as specified and directed.

Supply and laying of sub class 'B' bricks, locally available best quality laid flat (length of bricks laid across the length of cable) complete all as specified and directed.

M&L for sand cushioning in trenches for protection of under ground cable provided in layers of sand 8cm deep before laying the cable and 15cm deep after the cable(Punned down to 18 cm) complete all as specified and directed.(Note:- Punned thickness as 18 cm shall be measured and paid)

Bharat Sales Corporation

Minakshi constuction co.