REPAIR AND MAINT OF MAIN RECEIVING CUM DISTRIBUTION SUBSTATION (MDSS) AT NAVAL BASE KARWAR UNDER GE(SB) KARWAR

Amount

Taking down HT switch gear (Vacuum circuit breaker ) of capacity 11 KV 250/350 MVA , up to 1250 Amps comprising of following repairs, servicing,carrying out preventive maintanance and refixing the same after repairs/ servicing: -

(a) Tripping off the breaker, lowering the breaker with raising/lowering handle and pulling out the breaker complete from the panel along with the trolley for servicing/inspection/overhauling. (b) Servicing/Inspecting/checking of automatic safety shutter operation for serviceability and replacement of spares if required. (b) Servicing/Inspecting/checking of circuit spout and cicuit spout connections for RYB phases and replacement of spares if required. (c) Dismantling and checking of cross bar assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly and checking lamination with clamps, epoxy spout, isolator assembly etc.

(d) Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, arcing contacts and chamber baffle pot assembly, moving contact for proper setting of auxiliary contacts operating mechanism.

(e) Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required.

(f) Checking, setting and adjustment of lowering and raising operation of the breaker trolley.

(g) Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear, isolation resistance of trolley of with vacuum interrupter assembly.

(h) The inspection of HT switch gear shall involve:- (i) Inspection of truck & hoist assembly. (ii) Inspection of assembly & components of solenoid assembly. (iii) Inspection of assembly & components of dependent mechanism. (iv) Inspection of assembly & components of spring box mechanism. (v) Inspection of motor mechanism spring charge assembly (vi) Inspection of assembly of trip unit & related components, Make: ABB VCB Indoor type

Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, to put in to the VCBs and panels in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. (ii) Major spares like Breaker bushings, vaccum interruptur, busbar spout, busbar spout connections, circuit spout/circuit spout connections/buffer fixed contacts, moving contacts,solenoid spares, dependent/spring mechainsm/ motor mechanism, trip unit etc will be measured and paid separately under relevant items of Schedule 'A'. However the rate quoted shall be deemed to include for any other minor spares require replacement.

Supply only the following spares suitable for 250 MVA to 450 MVA HT switch gear VCBs and 11 KV HT panel repair work under relevant Schedule-

(a) Torsion spring suitable for 11KV VCB

(b) Motor cut off switch suitable suitabe for 11KV VCB

(c) Charging motor suitable for 11KV VCB

(d) LED Indication Lamps

(e) Shunt trip coil 110 V DC/220 V DC

(f) Shunt trip coil 110 V DC/220 V DC with assembly

(g) Breaker control switch

(h) Busbar Spout

(j) Circuit spout

(k) Control circuit fuses 2 A to 63 A

(l) HRC fuse (PT HT side)

(m) PT plug contact

(o) VCB buffers

(p) 110 Volt DC clossing coil assembly

(q) Push to trip knob red assembly

(r) Push to trip knob green assembly

(s) Ratchet wheel

(t) Nylon release lever

(u) VCB charging powl

(v) Shutters for racking shaft

(w) Bus bar support insulator for VCB panel

(x) Vacuum interrupter

(y) Monoblock for busbar spout/circuit spout

(z) Spring drum suitable for 11KV VCB

(aa) Spring suitable for 11KV VCB

(ab) Roller chain suitable for 11KV VCB

M&L for Strip Opening the busbar of the 21 HT 11 KV VCB panels for decarbonising of busbar and connected items/removing the old teared/ unsv insulation from the bus bar, checking the IR value before fixing the HT sleeve and refixing the heat shrinkable insulating tape and sleeve suitable for 11 kv busbar not less than 3mm thick having dielectric strength not less than 15kv/mm and HT insulation tape for CT/ PT connection complete painting of VCB panels inside and outside with approved color including lettering details all as per existing and checking the IR value before testing and commissioning the bus bar all as specified . Note :- Test sheet of IR value shall be submitted by the contractor, no cost extra shall be paid by the department and all testing requirement shall be arrange by the contractor including transportation and T&P.

Supply and fix in replacement & testing and commissioning of CTs epoxy cast wound primary with minimum primary current 60 to 400 A, single/ double ratio, double core (Protection core-5P10 & Metering core- Class 1.0), 25 KA for 1 sec of 15 VA minimum Burden including necessary fixing arrangemet to match with the existing system complete all as directed Make - as per OEM HT panel manufacturers..

Supply & Fixing in replacement & testing and commissioning of pottential transformer PT ratio 11000/110 Volts accuracy class 0.5, 50VA , indoor type , epoxy resin cast,strut type single stage suitable for power measurement, connecting to HT/VCB to match with the existing system complete all as directed Make - as per OEM HT panel manufacturers.

Supply & laying 1.5 sqmm flexible PVC stranded copper conductor cable, unshethed, 1100 V grade for control wiring.

Supply & laying 2.5 sqmm flexible PVC stranded copper conductor cable, unshethed, 1100 V grade for control wiring.

S& Fixing in replacement multifunction meter, Digital type (Displaying A, V, PF, Hz, KVA, KW, KVAR, KWh, KVARh etc.) Class 1/0.5 with RS485 port for communication in Modbus protocol.

S& Fixing in replacement of space heater with thermostat and new connected separate control with wiring

Note: The Contractor has to arrange necessary testing Kits, testing equipments, tools etc. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & setting shall be carried out in the presence of representative of the Department, and as per load to the satisfaction of the engineer –in-charge.

Supply , installation, testing & commissioning of multifunction protection Relay consisting of protection against – Directional Over current Element (67) Instantaneous Over-current Element Delayed Over current Element Controlled Over current ProtectionDerived Directional Earth Fault Element Derived Instantaneous Earth Fault ElementDerived Time Delayed Earth Fault Protection Measured Directional Earth Fault ProtectionMeasured Instantaneous Earth-fault ElementMeasured Time Delayed Earth Fault Element (51G) SEF Directional Element (67SEF) SEF Instantaneous Element..SEF Time Delayed Element (51SEF).High Impedance REF (64H) Cold Load Settings (51c)Negative Phase Sequence Over current (46NPS).Undercurrent Detector (37, 37G & 37SEF) .Undercurrent Guarded Detector (37).Thermal Overload Protection (49S). Arc Flash Detector (50 AFD) .Under/Over Voltage Elements (27/59) . NPS Overvoltage Protection (47)Neutral Overvoltage Element.Under/Over Frequency Detector (81) Typical Sequence with 3 Instantaneous and 1 Delayed tripBasic Auto-Reclose Sequence Voltage Detector OperationSync Function Voltage Detector Operation.Circuit Breaker StatusSequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off).Circuit Breaker Fail Protection (50BF).VT Supervision Function (60VTS).CT Supervision Function (60CTS-I) Logic Diagram: CT Supervision Function (60CTS)Broken Conductor Function (46BC) Trip Circuit Supervision Feature (74TCS) Close Circuit Supervision Feature (74CCS).Harmonic Block Feature (81HBL2)Load Blinder Three-Phase Load Blinder Single-Phase Load Blinder and Angle Over current Relay testing by secondary injection test kit Set relay setting as per load with all specification

Servicing,Inspecting,checking,cleaning by using of blower, Lubrication ,greasing and carrying out preventive maintenance of RMU capacity 11 KV, 250/350 MVA consist of 9 Nos breakers and RMU in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. Make-ABB/Schneider/Siemense

Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of RMU panels with approved colour including lettering details all as per existing etc.

Supply & fixing in repairs maintenance free batteries type VRLA, 2V DC 200 AH with suitable size copper conductor/ terminations/stand/ lugs etc complete including dismantling old one complete.

Supply, jointing & testing Indoor end termination cable joininting kit,heat shrinkable type 11 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 120 Sqmm to 185 Sqmm all as specified and as directed.

Supply, jointing & testing Indoor end termination cable joininting kit, heat shrinkable type 11 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 240 sqmm to 300 Sqmm all as specified and as directed.

S&F in replacement of old U/S Danger notice plate of 1.6 mm thick mild steel sheet vitreous enamelled white, with letters, figures & conventional skull & bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size,for HT 25x20 cm size all as specified & as directed.

M&L for earthing complete in repairs with galvanized steel earth plate electrode 600x600x6mm thick buried in ground vertical to a depth not less than 2.25 mtrs deep below ground level with top edge of plate not less than 1.5 mtr below normal ground level connected to galvanized GI strip of size 32 X 6 mm and 40 mm dia bore 7.5 mtr long light grade GI protection pipe for earth strip and GI watering pipe 40 mm dia medium grade from the top edge of earth plate fixed with deep cut on one end of pipe and fix from earth plate up to one feet above ground level of other end and plugged watering pipe at top with MS cap and grouted in PCC 1:2:4 of size 30 X 30 X 30 CM etc and 15 CM alternate layer of charcoal and salt around all sides of earth plate all as shown in electric plate no 3 of SSR part I of 2009.

M&L for servicing / cheking/inspection elctric motor driven ventilation system for MDSS, with and including dismantling units sheet metal parts, blowing out dust, chemical cleaning by spraying the organic based scale removing agent vaniklin at the appropriate ratio till removal complete dust & scale deposite in the fins area across the evaporator coil, flushing through for proper air follow across the coil, cleaning, greasing of blower motor, cleaning the air duct, renewal of rusted bolt,nuts and applying synthetic emamel paint over a coat of primer where ever the rusted portion, removal the pre filters,including checking the aligent of the drive set and testing commisioning the elctric driven air circulator all as specified as directed .

S&F in replacement of the worn out V belts (No B3290/B123) of the elctric motor driven ventilation system for MDSS, matching the proper alingment and testing .

cooltech engineering services

Raheel Enterprises

M/S MANOJKUMAR M NAGARKATTE

ANKIT SHIP REPAIRERS AND SUPPLIERS

JAI SHREE GOPAL ELECTRICALS

M/S Bhagyawanticonstruction