PROVN OF WORK SERVICES FOR IPSS AT 28 ED UNDER GE (AF) AMLA

Supply, installation, commissioning and testing of 3 way Ring Main Unit, 11KV, 630 A, 21KA, 3 sec, 50 Hz, ourdoor type, manually operated, non extensible RMU (02 LBS + 1 VCB) with IP-67 class of protection of tank & IP-54 class for full body, impulse withstand voltage of 75 KV, insulation level of 28 KV (@ power frequency of 1 min), control voltage 24V DC for motor operation, fully rated with earth switch, spring assisted mechanism, Arc proof hinged type cable cover interlocked with Earth Switch, Red/Green Push button for On/Off Operation, capacitive voltage indication fixed type, suitable rating CTs, Air insulated cable boxes and boots suitable for bottom entry front / side / rear termination of 3 core cable upto 300 Sqmm with following details :- (03 Module HT Switchgear having 02 LBS & 01 VCB) Make: ABB / Siemens / L&T / Crompton Greaves (a) Incoming: 02 Nos LBS, 630 Amp ring switch (for loop incomer & loop outgoing) having Isolator Load break switch triple pole, single break 3 position as incomer (On, Off and earth having STC capacity 21KA for 3 seconds with copper bus bar and copper earth bar as per IEC 61958-1, earth fault indicator. (b) Outgoing: 01 No., 630 Amp motorized Vaccum Circuit Breaker triple pole, single break 3 position as outgoing (On, Off and earth having STC capacity 21KA for 3 seconds with copper bus bar and copper earth bar as per IEC 61958-1, cable bushings, shunt trip control, bus bar cover, ring core current transformer of ratio 150-100-50A/1A. Note: 1. Foundation work as per OEM's recommendation shall be deemed to be included in the quoted rates for installation of RMU. 2. Units shall be SCADA compatible. 3. Drawing for RMU shall be got approved by GE before fabrication.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11 KV grade (earthed) of size 120 Sqmm, 3 core complete all as specified and directed.

Supply and fixing cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of sizes 120 Sqmm to 185 Sqmm complete.

Supply and fix servo controlled voltage stabilizer for automatic operation, three phase, naturally oil cooled, indoor type & designed for input variation between 300 V to 480 V with output voltage stabilized at 415 with accuracy ± 2.5% and speed of correction 8 Volts per second and of capacity 100 KVA complete all as specified and directed.

Supply and laying cable XLPE insulated screened, PVC bedded, galvanised, steel strip or wire armoured, electric power cable, (heavy duty) 1100 volts grade, with stranded aluminium conductor of size 3.5 core x 120 Sqmm complete all as specified and directed.

Material & labour for earthing complete with galvanised steel earth plate electrode 600mm x 60mm x 6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to galvanised iron earth strip 32mm x 6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion.

Excavation in trenches not exc. 1.5 Mtrs wide and not exc. 1.5 mtr deep and getting out in hard/dense soil all as directed and specified.

Returning filling in including spreading levelling watering and well ramming in layers not exc 25 cm thick all as specified and directed.

Removing of surplus excavated materials to a distance not exceeding mo mtr and deposting where directed at a level not exc. 1.5 mtr above the starting point all as specified and directed.

Material and labour for river sand, washed and screened dry for cushioning to under ground cable in trenches/ sub station cable ducts below and around under ground cable including spreading and levelling complete all as specified and directed.