PERIODICAL SERVICES AND MAINT OF 33 KV INSTALLATIONS AND DISTRIBUTION NETWORK AT OLD CANTT AND FORT CANTT UNDER GE (EAST) PRAYAGRAJ.

Excavation in trenches/pits in any type of soft soil not exceeding 1.5 m wide and not exceeding 1.5 m deep and getting out complete all as specified and directed.

Returning, filling in with the earth obtained from item No.01 here-in-before including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and directed.

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

Supplying and laying un-reinforced precast concrete cable cover factory made as per IS 5820-1970, class HVP, type 1 , size 300mm x 180mm x 40mm complete all as specified and directed.

M&L for clean and dry sand (unwashed) in trenches around the cable for cushioning complete all as specified & directed. Note :- Sand cushioning 8cm before laying the cable and 15cm after laying the cable & punned down 18cm,and punned thickness shall be measured and paid complete all as specified and directed.

Supply, laying, testing and commissioning in pipes/ ducts/ poles/ trenches/under floor/under road XLPE insulated cable screened PVC heavy duty with aluminium conductor,11000 Volt grade(earthed) of cross section area 95 Sqmm,3 core complete all as specified & directed.

Supply, laying, testing and commissioning in pipes/ ducts/ poles/ trenches/under floor/under road XLPE insulated cable screened PVC heavy duty with aluminium conductor,33000 Volt grade(earthed) of cross section area 120 Sqmm,3 core complete all as specified & directed.

Supply and laying 80mm bore GI pipe 'light grade' in trenches,under floors,roads,along poles for protection of cables,including sealing ends complete all as specified & directed. Note:- MS Clamps to be measured and paid under appropriate item.

Routine testing of 33 KV assets through authorised representative of manufacturer to be tested are as under:- (b) Transformer 33/11 KV, 1.6 MVA - 02 Nos and 2 MVA - 01 Nos. (A) Tests to be carried out :- (i) IR Value test of both transformer and bushings. (ii) Testing of tap changer. (iii) Dielectric strength of transformer oil. (iv) Earthing test

Routine testing of 33 KV SF 6 Breaker (03 Nos) by authorised representative of manufacturer to be tested are as under including supply and replacement of faulty components:- (i) IR Value both in open and close position (ii) Continuity of breaker in closed position (iii) Tripping and closing of breaker (v) CT ratio through primary injection. (vi) Polarity test. (vii) Testing of all the protetion relay i.e O/C, eath fault, instantaneous, trip suspention, and auxiliary relay etc, calibration. (viii) Operation/working of charging motor and limit switch. (ix) Calibration of all relay , male , female contacts of VCB. (x) Earthing. (C) Testing of control and relay panel for 33KV/11KV transformer 2000 KVA & 1600 KVA- 03 Nos. (D) Testing of 36 KV, 31.5 KA current transformers - 3 set. (E) Testing of 36 KV, 31.5 KA Potential transformers - 3 set. (F) Testing of 36 KV , lightening arrestor expusion type 100 KA discharge- 03 sets. (G) Testing of vaccume circuit breaker Incomer 630 Amps through primary and secondary injection kit - 3 Nos. (H) Testing of vaccume circuit breaker Outgoing feeder 630 Amps through primary and secondary injection kit - 5 Nos. (J) Testing of bus couple 630 amps through primary and secondary injection kit - 03 Nos. (K) Testing of fuse set unit 33 KV- 03 Nos. (L) Testing of line Isolator switches- 08 Nos.