EXTENSION TO BACK FEED OF HT SUPPLY FROM HVDB TO PS-II AT MAFI CCR AT AFS YELAHANKA

Supply, installation , programming, testing and commissioning PLC based automated panel with S7-1200 PLC CPU (DI -44DO-16 RS 485 ) 9 Inch HMI 5 Amps SMPS , MCB 2 Pole (1 for AC , 1 For DC 8 Chane relay board , LAMPS for PLC Healthy staus , DC , AC supply Healthy , Hooter / buzzer . push button for ACk and reset , wiring coils in enclosure of size 1.5mx1m , cable entry from the bottom with following components : - (a) LVM for I/C and O/G (b) 12 core armed 1.5 sqmm CU Control cabel -250 Meters (35 meter x 7 Runs ) (c) Control cable layng and terminations (d) Control cable glands both terminations (e) Add on relays for multipurpose (f) 1 KVA UPS with 30 Min Back up Note : Contractor has to submitt details drawing before commisioning the panel (ii) Prgramming of the PLC Panel is suitable to understand and fullfill the requirement of auto operation of HT VCB and DG Set simaltaneously to give the reverse feed from MAFI II to Mafi Sub station No 1 in case of failure of supply to at MAfi Sub station I . (iii) Any tech requirement/ Change require for sucessfull operation of reverse feed from Mafi II to Mafi I will be deemed to be included in the quoted rate. (iv) Anything which is technically required but not included in the schedule will be included without any extra cost from the department. (v) full payment to the contractor will be release after successfull testing of the panel in the presence of user rep.

11 KV operating voltage, 21 kA for 3 seconds, 3 phase 50 Hz, IP 54, SCADA compatible, motorized, Four way Ring Main Unit comprising four number Motorised vacuum circuit breakers duly interlocked , battery chargers, totally enclosed metal clad switch gear with motorized with battery and charger, protection relays, having rated current of Ring Switch and Breaker is 630 Amp, One side extensible, with internal arc classification with AFLR with 21 kA for 1 second, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer. The unit shall be painted in RAL 7032 / 7035 paint shade with following specifications and all as per the IEC 60298,IEC 60265, IEC 60129, IEC 60420, IEC 60056, IEC 60694 and as per the specification of the manufacturer.

(a) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) Multi powered Over current, Earth Fault and short circuit three element numerical Relay. (iv) Resin cast current transformers for protection mounted CT ratio 40-80/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Molded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) Right Angle Boots-NON TOUCH PROOF.

(b) General specifications: (i) One set of positive standard electrical/mechanical interlock to avoid unsafe operations. (ii) Provision of pad locking for open, close, earth position in correct sequence. (iii) Monometer for indicating SF6 gas pressure with green and red zone. (iv) 2.5 mm thick stainless steel SF6 tank with robotically welded construction with IP67 protection. (v) External stud for earthing connections. (vi) One no of Operating Handle. Note:- (i) Anything missed above but is required for efficient functioning of RMU is deemed to be included in the quoted rate. (ii) Complete Drawing to be submitted GE for approval before to giving manufacturing clearance. (iii) Necessary foundation to be made at site as per manufacturer recommended. (Iv) Security fencing as per IE rule necessary for security of HT Equipment shall also deemed to be included in the quoted rate , contractor has to take the approval of fencing from Engr In Charge / GE before commencement of work.

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in deep and getting out in hard/dense soil for laying underground cable, foundation etc all as specified and as directed.

Returning and filling of trenches in two parts (i) using riddled soil obtained from excavated soil upto depth of 30cm (8cm below cable and remaining above cable) for cushioning of cable and (ii) refilling the trench of remaining depth with normal excavated soil all as specified and directed. Note: - Excavated soil shall be riddled by using sieve to separate composite particles etc as per IS 1255-1983 and refilling in trenches as in cable cushioning.

Removing excavated material not exceeding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point all as directed

Supplying and laying un-reinforced precast concrete cable cover, class HVP, type 1 flat of size 300mm x 180mm x 40mm complete all as specified and directed.

Supply laying & testing cable XLPE insulated screened PVC Bedded galvansied steel strip or wire armoured , electric power cables ( Heavy duty ) with stranded aluminium conductor , 11000 Volt grade of size 3 Core 120 Sqmm

Supply and fix in repair Indoor type cable end terminations (heat shrinkable) with all accessories suitable for 3 core 11KV U/G XLPE earthed cable of size 120 to 185 sqmm Sq.mm including testing complete all as specified and as directed by Engr-in-charge.(Make: M-Seal/Denson/Raychem) or equivalent.