SPECIAL REPAIR TO REPLACEMENT OF 2/4 POLE STRUCTURE TO WK ALL CONNECTED FEEDER TO RIDGE ROAD POWER HOUSE UNDER GE WEST JABALPUR

Taking down old UNSV earthing any type any size . Note: Excavation & earth work where required shall be measured & paid separately under relevant items.

M&L in replacement for earthing complete with galvanised steel earth plate electrode 600x600x6.0mm thick directly burried in the ground (earth pit not less than 2.25M deep below ground level) with top edge of earth plate not less than 1.50M deep below normal ground level, connected to galvanised iron strip 32x6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel, 40mm bore GI pipe light grade including necessary fittings for protection of earthing strip, watering pipe 20mm bore GI medium grade, concrete chamber in PCC (1:4:8) type D-2 using 40 mm grade aggregate, coping shall be in PCC (1:3:6) type C-1 using 20 mm grade aggregate and internal surfaces of concrete chamber shall be given 12mm thick plaster in CM (1:4), funnel with wire gauge of 22 gauge 8 mesh per linear including 50mm thick cover of RCC (1:2:4) type B-1 using 20mm grade stone aggregate reinforced with 8mm MS TMT bar @ 75 mm C/C both ways, char coal dust and common salt all as shown in electrical plate No. 3 of SSR Part-I (2009) including all necessary excavation & earth work and removal of surplus soil to a distance n. exc 50M and providing connection points with MS/ GI bolts & washers as required and connection from earth test point to earth electrode with same GI earth strip alongwith protection pipe and testing on completion complete all as specified and directed. Note:- GI strip and protection pipe from earth electrode to test point max upto 7.50M shall be deemed to be included in the unit rates as quoted by the contractor.

M&L for cable jointing kit for 11 KV (Earthed) 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 120 sqmm to 185 sqmm and testing on completion complete all as directed.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm and testing on completion complete all as directed.

Supply and spreading the stone aggregate of 40 mm size spreading in the substation/ as where directed at site

Material and labour for providing cement concrete 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) for coping of poles including necessary form work and finished the surface complete all as specified and directed.

Supply, installation, commissioning and testing of 12 kV SF6 Ring Main Unit, compact, out door type, 630 Amps, rated capacity 21 kA for 1 sec having 4 vacuum circuit breaker (VCB) insulated in SF6, two load break switch (LBS) insulated in SF6 and one Bus PT panel extensible to right side RMU/ Outdoor, motorised having metering panel and copper bus bar of suitable ampere ratings complete with and including the followings:- Make of RMU:- Schneider or ABB or Siemens or Crompton as approved by GE. Notes: (i) Brief description of this item is "12 kV, SF6 Ring Main Unit complete with 4 Vacuum Circuit Breaker + 2 LBS+ 1 Bus PT Panel (Right side extensible / OUTDOOR). FBX-RE/12-21/ M+CT2T2 /OUTDOOR - MOTORIZED". (ii) As per manufacturer's design, cost of making of platform shall be deemed to be included in unit quoted rates. (iii) All necessary arrangements for performance testing of RMU shall be made by contractor without any extra cost to the Government.

(A) HT COMPARTMENT: VACUUM CIRCUIT BREAKER - Each module (Vacuum circuit breaker) enclosed in SF6 -04 Nos. (a) The function unit shall consist of a three position switch. The three position switch shall fulfil the operation of the disconnector function and the earthing function. The circuit breaker unit T2 shall be equipped with an over current time release for the protection of distribution transformer. (b) Vacuum circuit breaker shall be of 12kV, 630 Amps, 21 kA for one sec enclosed in SF6. (c) Spring assisted closing with stored energy tripping mechanism for T2-motorised operation with integrated earthing switch. (d ) Having auxiliary contacts on load break switch 1 NO+2 NC & auxiliary contacts on earth switch 1 NO+1 NC - 01 No. (e) Self powered electronic numerical protection relay providing 3 over current & 1 earth fault protection - 01 No. (f) Tape wounded protection CT shall be 100/5, 10P5, 2.5VA - 03 Nos. (g) Tape wounded metering CT shall be 100/5, Class-1.0, 2.5 VA - 03 Nos. (h) Shunt trip Coil - 24 V DC - 01 No. (j) Capacitive voltage indication fixed type (LED display) - 01 No. (k) On/ Off/ TRIP mechanical indication on the front mimic of the panel-01 Set. (l) Cable box for termination of XLPE cable of size 3 core 95 sqmm to 120 sqmm aluminium conductor- 01 No.

(m) Cable cover standard - 01 No. (n) Emergency trip push button- 01 No. (o) Set of 12 kV cable termination boots - 1 Set (p) Ammeter of suitable capacity/ class -01 No. (q) Rated frequency - 50/60 Hz (r ) Rated Power frequency withstand voltage directly earthed -28 kV (s) Level of insulation for the SF6, rated lightening impulse withstand voltage - 75 kV (t) Level of insulation for the SF6, rated power frequency withstand voltage - 28 kV (u) Level of insulation of the sectionalized distance for the cable test energized busbar, maximum AC feeder test voltage - 18 kV (v) Rated current busbar C-R-RE functions - 630 Amps (w) Rated current busbar SB functions - 630 Amps (x) Rated current outgoing feeder- 630 Amps (y) Rated short time current, main electrical circuit for 1 Sec - 21kA (z) Rated short time current, earthing circuit for 1 Sec - 21kA (aa) Rated network load and closed loop breaking current - 630 Amps (ab) Rated no load cable breaking current -160 Amps (ac) Rated breaking current under earth fault conditions - 630 Amps (ad) Rated no-load cable breaking current under earth fault conditions - 277 Amps

(B) HT COMPARTMENT: LOAD BREAK SWITCH- C, 12 kV, 21 kA, 630 Amps - EACH MODULE (LBS) enclosed in SF6 -02 No. (a) The switching unit shall be so designed as a three position switch. The three position switch combines the functions of switch disconnector and earthing switch. The switch disconnector as well as the earthing switch shall be equipped with a separate drive unit. (b) Cable switch 11 kV, 630 A, 21 kA for 1 sec - 01 No. (c ) Spring assisted mechanisim for C-manual operation with integrated earthing switch - 01 No. (d) Cable bushing 630 Amps, Standard C-bushings - 01 No. (e) Aux switch for load break (ON & OFF) - 01 No. (f) Cable Cover standard - 01 No. (g) Capacitive voltage indication fixed type (LED display) - 01 No. (h) On/ Off/ EARTH indication on the front mimic of the panel - 01 Set. (j) Cable box for termination of XLPE cable of size 3 core 95 sqmm to 120 sqmm aluminium conductor- 01 No. (k) Operation counter - 01 No. (l) Cable boot suitable for 11 kV - 01 Set, cable entry shall be provided from front bottom (m) Rated frequency - 50/60 Hz (n ) Rated power frequency withstand voltage directly earthed -28 kV (o) Level of insulation for the SF6, rated lightening impulse withstand voltage - 75 kV (p) Level of insulation for the SF6, rated power frequency withstand voltage - 28 kV