REPAIR/MAINT OF VCB , RMU, TRANSFORMER , ISOLATION TRANSFORMER , SERVO VOLTAGE STABILIZER AND CONNECTED WORKS AT AF STATION BIHTA

Amount

complete servicing of VCB Make : Siemens installed at Air force station Bihta by using required T & P including taking down old unserviceale spare parts of any nature and replace with new and making functional upto the satisfaction, working with all functions like OC, UV, EF, instant tripping on fault including testing with required instruments as per secondary injection method complete all as directed by Engr-in-Charge. The servicing covers the following :- (a) Through cleaning of breaker chamber (b) Lubrication of shutter mechanism/moving parts (c) Checking of shutter movement (d) Checking door interlocks with breaker (e) Checking of breaker interlocks with panel door (f) Checking of breaker rack in/out inside the panel. (g) Coiling of closing and tripping coil (h) Checking of gear box operation. (j) Checking of Test/service Aux. switch operation (k) Checking of tripping mechanism operation. (l) Spring charging limit switches operation. (m) Checking healthiness of three poles. (n) Checking of damping device and setting. (o) Tightness, checking of power connection. (p) Checking of breaker ON/OFF operation manually and electrically.

(q) Checking of closing timings. (r) Checking of tripping timings. (s) Functional checking of all electrical and mechanical operation of brekers. (t) Co-ordination of relay and their testing with required testing equipment according to source incomer VCB and submit report for record. (g) Checking/replacement of non functional strip heaters inside the VCBs and allied works. Note: The breaker shall be repaired through authorised dealer or representative of Original Equipment manufacturer of VCB. Location : VCB ( Make : SIEMENS ) installed at Radar Sub Station - 02 Nos, OPS Sub Station No 5 - 02 Troops Sub Station - 06 Nos, VCB (Make: ABB) installed at Sub Stn No 1.-02. Radar Sub Stn - 03 Nos , Ops Sub Stn No 5 - 03 Nos Note : (a) Spare parts required for repair of VCB shall be measured and paid S & F under relevant items herein after ser No 2 to 27. (b) After completion of repair work, VCB shall be connected to full load and testing to be carried out infront of AGE E/M GE (AF) BIHTA showing all functional/operational system are working satisfactorily.

S & F of Spring Drum complete as specified as per OEM instruction. Cat part No 1VYN300950-20 co

S & F of Stop Washer complete as specified as per OEM instruction. Cat part No GCE7006075P0101

S & F of Cam Disc complete as specified as per OEM instruction. Cat part No GCE7001923P0101

S & F of Locking Roller complete as specified as per OEM instruction. Cat part No 1VYN400950-164

S & F of Torsion Spring complete as specified as per OEM instruction. Cat part No 1VYN400950-002

S & F of Charging Lever complete as specified as per OEM instruction. Cat part No 1VYN400950-114

S & F of Roller Bearing complete as specified as per OEM instruction. Cat part No 1VYN400950-077

S & F of Torsion Spring complete as specified as per OEM instruction. Cat part No 1VYN400950-010

S & F of Lever Assembly complete as specified as per OEM instruction. Cat part No 1VYN400901-R

S & F of Shaft complete as specified as per OEM instruction. Cat part No 1VYN300950-013

S & F of Control Washer complete as specified as per OEM instruction. Cat part No GCE7001917P0101

S & F of Motor - 220V DC/AC complete as specified as per OEM instruction. Cat part No 1VYN300951-002 (GCE0940084P0106)

S & F of Motor Cut Off Switch complete as specified as per OEM instruction. Cat part No HAGT444559P2

S & F of Sprocket Wheel complete as specified as per OEM instruction. Cat part No 1VYN400950-208

S & F of Ratchet Plate complete as specified as per OEM instruction. Cat part No GCE9478400P0101

S & F of On-Off Indicator (Display) complete as specified as per OEM instruction. Cat part No GCE7001910P0101

S & F of Shaft complete as specified as per OEM instruction. Cat part No 1VYN300950-030

S & F of Tripping/Closing Coil-110V DC complete as specified as per OEM instruction. Cat part No 1N54450007-M

S & F of Pin Plug Assembly complete as specified as per OEM instruction. Cat part No IN26570001-AM

S & F of Emergency Trip Assembly complete as specified as per OEM instruction. Cat part No IVYN400901-AF

S & F of Connection Piece complete as specified as per OEM instruction. Cat part No 1VYN400950-204

S & F of Aux. Switch complete as specified as per OEM instruction. Cat part No 1VYN300950-064

S & F of Contact System For VD4-630 A (12 Finger) complete as specified as per OEM instruction. Cat Part No. GCE8385888R0102

S & F of Alu.Contact Arm Assly.For VD4 CB(800A) complete as specified as per OEM instruction. Cat part No GCE700142R0119

S & F of Cu.Contact Arm Assly.VD4 CB complete as specified as per OEM instruction. Cat part No GCE7001421R0101

S & F of Contact System For VD4-1250 A(DIA.34 &24 Finger) VD4 complete as specified as per OEM instruction. Cat part No GCE8385888R0101

S & F in replacement of sleeved copper bus bar 800Amps for interconnection between siemens -3 Nos breakers + 1 No bus coupler including replacement of suitable size of steel nuts, bolts & washers etc complete all as specified and as directed.

S & F in replacement of Racking trey stand of suitable size for racking of VD4 breaker In/Out. The size of racking shall be as per manufacturers instruction and complete all as specified and as directed.

S & F in replacement of space heater 0.5KW, 230v AC suitable for VCB alongwith suitable size of thermostat for instant tripping complete all as specified and as directed.

Complete servicing of Existing RMU (Make : ABB) installed at various 11 KV Sub Stations at AF Stn Bihta by using required T & P including taking down old unserviceale spare parts of any nature and replace with new and making functional upto the satisfaction, working with all functions like OC, UV, EF, instant tripping on fault including testing with required instruments complete all as directed by Engr-in-Charge. The servicing covers the following :-

(a) Through cleaning of breaker chamber (b) Checking of closing and tripping coil (c) Checking of Test/service Aux. switch operation (d) Checking of tripping mechanism operation. (e) Spring charging limit switches operation. (f) Checking healthiness of three poles. (g) Tightness, checking of power connection. (h) Checking of breaker ON/OFF operation manually and electrically. (j) Checking of closing timings. (k) Checking of tripping timings. (l) Functional checking of all electrical and mechanical operation of breakers. (m) Co-ordination of relay and their testing with required testing equipment according to source incomer VCB. Note: The breaker shall be repaired through authorised dealer or the representative of OEM manufacturer of ABB. Location : Sub Stn No 2, ATC Sub Stn, TC P/H Sub Stn & Sub Stn No 5 Note : (a) Spare parts required for repair of RMU shall be measured and paid under relevant items herein after ser No 32 to 45. (b) After completion of repair work, RMU shall be connected to full load and testing to be carried out infront of AGE E/M GE (AF) BIHTA showing all functional/operational system are working satisfactorily.

S & F in replacement of Bushing 400 Series Bolted Type complete as specified as per OEM instruction. Cat part No NHP201699R1 Make : ABB

S & F in replacement of O' Ring 72x6 Bushing 400 series bolted complete as specified as per OEM instruction. Cat Part No NHP402076P15 Make : ABB

S & F in replacement of Trip coil safeo force Amplifier Cat No 1VDP000142R1 Make : ABB

S & F in replacement of VPIS unit, 9-15 kv type, complete as specified as per OEM instruction. Cat No YN1V400916-587 Make : ABB

S & F in replacement of Relay complete as specified as per OEM instruction. Make : Ashida Cat No 4200013670

S & F in replacement of digital COS₵ Meter ,C.l-1.0,Aux.Supply- 80-240V AC/DC complete as specified as per OEM instruction. Make –Conzerv

S & F in replacement of digital Ampere Meter ,C.l- 1.0. Aux.Supply- 80-240V AC/DC complete as specified as per OEM instruction. Make –Conzerv

S & F in replacement of digital Volt Meter ,C.l- 1.0. Aux.Supply- 80-240V AC/DC complete as specified as per OEM instruction. Make –Conzerv

S & F in replacement of Numerical O/C & E/F Relay , Aux.Supply- 80-240V AC/DC. CT- 5-1A complete as specified as per OEM instruction. Cat part No ADR141C

S & F in replacement of VAA 33 Aux.3 Element Relay ,Aux.Supply 30V DC,06 ON Contacts complete as specified as per OEM instruction.

S & F in replacement of VAJH13 Master trip relay ,Make- Alstom, Aux.Supply 30V DC.04 ON Contacts & 01NC Contacts complete as specified as per OEM instruction.

S & F in replacement of damaged/unsv CT of Ratio – 60/5+5A,VA-7.5VA,5P10,C.l-1.0 complete as specified as per OEM instruction. Make- NPP,Power Foil,

S & F in replacement of damaged 3 Phase PT of ratio – 11KV/110V ,VA-100,C.l-1.0. suitable for existing model RMU complete as specified as per OEM instruction. Make- NPP,Power Foil.

S & F in replacement of Bus bar insulator as per existing size model.suitable for HT 11000 volts complete as specified as per OEM instruction.

M & L for GOD switch, Material and labour for switch Air break gang operated triple pole mechanically operated vertical type 12 insulators and with galvanized frame, operated from ground level including operating rod, handle locking mechanism, current carrying capacity 200 Amps 11000 Volt with nut bolt and washers etc including taking down of old UNSV GOD complete all as specified and as directed.

Cable jointing kit suitable for 11 KV (Earthed) grade cable outdoor termination, heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 to 120 Sq mm complete all as specified and directed.

Cable jointing kit suitable for 11 KV (Earthed) grade cable indoor termination, heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 to 120 Sq mm complete all as specified and directed.

Excavation in trenches n.exc 1.5 mtr wide and n.exc 1.5 mtr deep in loose / soft soil and getting out for under ground cable / erection of poles, stays etc complete all as specified and as directed.

Returning, filling in including spreading, levelling, watering and well ramming in layers n.exc 25 cm thick complete all as specified and directed.

Removing of excavated material n, exc 50 mtr away and depositing where directed at a level n, exc 1.5 mtr above the starting point complete all as specified.

Labour for re-laying of bricks subclass ‘B’ old size laid flat perpendicular to the direction of cable for protection of cable complete all as specified.

M&L for laying of bricks subclass ‘B’ old size laid flat perpendicular to the direction of cable for protection of cable complete all as specified.

Supply and spreading clean and dry screened sand (unwashed) in trenches around the cable for cushioning complete all as specified and directed by Engineer-in-Charge. Note :- Punned thickness shall be measured.

M&L for PCC 1:4:8 type D-2 using 40mm graded aggregate, mechanically crushed stone for mass filling in pole pit /foundation /any other means etc complete all as specified and as directed by Engr-in-Charge.

M&L for PCC 1:3:6 type C-1 using 20mm graded aggregate mechanically crushed stone for mass filling in stay pits and foundation /any other means complete all as specified and as directed by Engr-in-Charge.

Supply & fixing in replacement for 50mm bore GI tubing light grade, on poles, under floors, road crossing etc all as reqd at site complete all as specified and as directed by Engr-in-Charge.

Supply & fixing in replacement for 80mm bore GI tubing light grade, on poles, under floors, road crossing etc all as reqd at site complete all as specified and as directed by Engr-in-Charge.

Disconnecting & taking out defective under ground cable from trenches, pole, pipe, floor, wall etc locate the fault, rectify the defect and relaying the same XLPE cable under ground PVC insulated and overall sheathed aluminum conductor heavy duty 11000 volts connecting and testing complete all as specified and as directed by Engr-in-Charge. Note: (Excavation,earth work, brick protection sand cushioning and GI pipe etc shall be measured & paid for separately)

M&L for earthing complete with galvanized steel earth plate 600mm X600mm X6 mm thick, buried directly in ground (earth pit not less than 2.25 mtr deep below ground level ) with top edge of the plate not less than 1.5 meters below normal ground level, connected to galvanised iron strip 32x6 mm dia as earthing lead by means of bolts, nuts, check-nuts, and washers of galvanised iron or steel besides welding at all joints as shown in drawings and including excavation and earth work, GI pipe light grade 40 mm bore for protection of GI strip from earth electrode to and including the earth test point of galvanised Iron/steel . supplying and laying charcoal stone aggregate) chamber and RCC cover of size 54CMx54CMx50 MM (1:2:4) type B1 using 20 mm graded crushed stone aggregate reinforced with 8 mm dia TMT bars @ 75mm C/C both ways with mild steel handle 12 mm dia, PGI funnel with wire mesh, 20 mm dia GI pipe medium grade for watering all as shown in drawing including taking out the old one. Note -(i) Cost of GI strip and GI protection pipe up to a distance 7.5 M shall be included in quoted rate of this Items. (ii) Required earth work shall be included in this item.

B.K. ROY & SONS