Repair and maintenance to HT switch gear VCBs at Tigris MAP Sumran Line MAP Shekhawati Line Hazipeer Line NPG Line Panchwati DAD NSB III CASD 60 Bde 30 MAHAR 255 TC 262 TC 326 AD 510 AD 7 ASSAM 12 Engrs 261 Arty Bde and associated area under

Amount

Material and labour for servicing /testing and calibration of breaker/control panel including CT, PT and relays in control panel of VCB/OCB of capacity 800/630/400 Amps and rating 11 KV complete as details mentioned as under:-

(a) Details of servicing of breaker :- (i) Adjustment of mechanism if required. (ii) Clean the circuit breaker to remove dust and dirt. The envelope of the vacuum interrupter and insulating materials shall be wiped with a clean cloth. (iii) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (iv) Check for rust and wear. (v) Check Spring Tension and pitting of the Cluster Contacts. (vi) Visual check for rust and deformation. (vii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (viii) Check for loosened connections, rust, damaged lead wires. (ix) Check whether the contacts are damaged by arcing. (x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Checking of Jaw Contacts Conditions and repair/adjust. (xiii) Replace the jaw contacts,If required. (xiv) Improvement of resistance of epoxy insulator and epoxy body by applying post heated varnish. (xv) Replacement of Dashpot/shock absorbers . (xvi) Replacement of carbon brush of spring charging motor

(b) The following test shall be carried out:- (i) Primary Injection Test of CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (iv) Contact resistance test for all three poles (v) Closing coil resistance (vi) Tripping coil resistance. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay :- (i) Over current and earth fault relay (d) Testing of followig Aux relay (i) DC Supply supervision relay. (ii) Master trip relay Note:- Test report shall be laminated to control panel of respective breake

S&F in replacement of panel door lock suitable for 400/630/800 Amps , 11 KV HT VCB complete all as specified and directed.

S&F in replacement auxillary switch (7 No + 7 NC) suitable for 400/630/800 Amps, 11 KV VCB complete all as specified abd directed.

Supply and fix in replacement T&C switch for breaker ON/OFF purpose in HT 11 KV VCB panel including associated wiring, if reqd, for proper functioning of switch complete all as specified and directed.

S&F in replacement support road with screws suitable for 400/630/800 Amps 11 KV VCB complete all as specified and directed.

S&F in replacement support insulator suitable for 400/630/800 Amps 11 KV VCB complete all as specified and directed.

S&F in replacement caution plate "CAUTION MEN AT WORK" of size 40 cmx15 cm made out of white acrylic sheet with Red coloured glow tape.

Supply only rubber rett/self amalganating electrical tape for 11KV/HT supply, 3/4" width, 30 mtr length. Make : 3M/Scoth/Godson/Max Electric.

M&L for preparation of painted surface of floor mounted HT control panel for fixing of FLOURCENT REFLECTIVE LETTERING of approved colour and re-write the name/capacity/fed from each cope point HT etc in capital letters of size not less than 2 inch width and 3 inch height and works not exceeding 20 letter per panel all as specified and directed.

S&F in replacement of isolating contact assembly suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of fixed contact block complete suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of moving contact block complete suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of motor & gear assembly 230V AC suitable for 400/630/800 amps, 11 KV HT VCB including testing & puting on load complete all as specified & directed.

S&F in replacement of spring bearing gear suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of closing coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement of tripping coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement support insulator suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement upper connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Supplying & Fixing in replacement lower connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

S&F in replacement (at site on OCBs as per existing size), male contact (Copper) suitable for HT 11 KV power supply complete all as specified and directed.

S&F in replacement (at site on OCBs as per existing size), Female contact (Copper) suitable for HT 11 KV power supply.

S&F in replacement, hooter complete with switch etc. suitable for warming HT 11 KV VCBs internal chambers (as in existing) complete all as specified and directed

S&F in replacement OCB spring charger assembly complete all as specified and directed.

S&F Shunt trip asly 24 V/110 V DC complete all as specified and directed.

Material and labour for repair/maintenance of bus bars inside HT 11 KV panels, by removing old burnt out insulation tapes and dust layers, cleaning with CRC/thinner and drying properly. Insulating the bus bars with HT 11 KV insulation tapes making arrangements for dust and vermin proof to the HT 11 kV panels at different locations complete all as specified and directed.

Supplying, installing, testing and commissioning in repairs of Indoor arc flash protected Draw-Out with roll on floor type Vacuum Circuit Breaker HV compartment , rated for 11kV,1250 Amp,25 kA /3-sec, confirming to IEC 62271-200, Internal Arc Classified IAC AFLR – 25 kA for 0.1 sec for all three chamber (Bus, Cable & Breaker) , Accessibility Class LSC2B-PM Class, comprising of 1250 Amp, continuous rated Copper busbars and droppers, 01nos. The earthing switch for maintenance purpose and discharge function to be provided in the cubicle and should be an integral part of the cable chamber alogwith operating handle ie rack -in-rack -out. 4 NO+4NC shall be provided in breaker. The HV compartment shall consist of following :- (i) 11kV, 1250Amp, 25 KA/3-sec, Draw-Out Vacuum Circuit Breaker as per IEC-62271-100. Vacuum Circuit Breaker having 03nos. vacuum bottles of same make as of circuit breaker, motorized spring charging mechanism (230VAC) with integral spring charging handle for manual charging, associated push-buttons, anti-pumping feature, and associated Shunt Trip/Close Coils (24 Volt DC). Note :- (i) HV compartment shall support installation of existing CT. The HV compartment shall be integrated with existing LV compartment . (ii)All retrieved items shall be returned to store yard of MES. (iii) VCB compartment replace as One Incomming, One coupler and five outgoing VCB.

Supplying and fixing Current Transformers draw type 11kV, 300/150/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall beintegrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Current Transformers draw type 11kV, 200/100/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall beintegrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Current Transformers draw type 11kV, 100/50/1-1, Core1: Class 5P10, 10VA, Core2: Class 0.5, 10 VA . Note : The item shall be integrated in HV compartment of VCB assembly through wiring for implementation of protection VCB the rate of the same deemed to be included in quoted rate.

Supplying and fixing Potential Transformers, Draw-out type in existing HV panel for easy maintenance, 11kV/rt3:110V/rt3, 50VA, Cl.0.5 with associated gun-type HRC fuses and MCBs for HT/LT isolation Note : The item shall be integrated with HV compartment of VCB assembly through wiring for implementation of metering of VCB the rate of the same deemed to be included in quoted rate.

Supplying and installation of Relay and metering panel in existing HV compartment factory made 2.0 mm thick IP 54 mounted to be mounted on VCB HT compartment comprising of following:-

(a) Main Protection Relay:- (i) Main protection Numerical Relay draw out type in HT 11 KV VCB Panel comprising of new and modern numerical scheme for detecting, indicating and tripping the breaker on faults over-current and earth-fault in any of the three phases, Trip circuit supervision relay, 5% pick up for OC and 5% for EF. The relay shall also have the following features as minimum; (i) Programmable rated current 1A & 5A, (ii) Last 8 fault record & 200 event record with time stamping, (iii) 4 analog CT & 3 PT input, 8 DI & 8 DO, (iv) Communicable on IEC61850 protocol, (v) Disturbance recording upto 300 cycles, (vi) Self supervision function. The relay shall be fully integrated with the feeder, internally capturing feeder statuses if available including Breaker On, Off, Spring Chrgd, Test, Service, AC-Fail, Trip circuit healthy relay, PT supervision, Master trip relay, local remote and display the same locally on a built-in LCD screen and suitably labeled status LEDs. Relay shall have facility to locally Trip/Close the breaker as a backup to TNC switch provided separately on the panel.

(b) Metering Equipment including:- (i) 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), (ii) 01 x Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port.

(c) LED Indications :- (i) Breaker ON/OFF/TRIP/Spring-Charged, (ii) Trip Circuit Healthy (iii) R-Y-B (iv) DC available LED with push button. (v) AC Supply fail.

(d) 08-Window Annunciator with Hooter to indicate following alarms :- (i) OC Trip, (ii) EF Trip (iii) Trip Circuit Failure, (iv) Inter-Tripping Fault, (v) PT Fuse Failure The Annunciator will be complete with required Acknowledge/Test buttons as required

(e) Flush mounted Auxillary Protection Relays incl:- (i) Trip Circuit Supervision Relay (ii) Master trip Relay (iii) PT Fuse failure relay. (iv) DC Supervision Scheme

Supplying and installation of Relay and metering panel in existing HV compartment factory made 2.0 mm thick IP 54 mounted to be mounted on VCB HT compartment comprising of following:-

(a) Main Protection Relay:- (i) Main protection Numerical Relay draw out type in HT 11 KV VCB Panel comprising of new and modern numerical scheme for detecting, indicating and tripping the breaker on faults over-current and earth-fault in any of the three phases, Trip circuit supervision relay, 5% pick up for OC and 5% for EF. The relay shall also have the following features as minimum; (i) Programmable rated current 1A & 5A, (ii) Last 8 fault record & 200 event record with time stamping, (iii) 4 analog input, 8 DI & 8 DO, (iv) Communicable on IEC61850 protocol, (v) Disturbance recording upto 300 cycles, (vi) Self supervision function. The relay shall be fully integrated with the feeder, internally capturing feeder statuses if available including Breaker On, Off, Spring Chrgd, Test, Service, AC-Fail, DC supervision relay, Trip circuit healthy relay, Master trip relay, local remote and display the same locally on a built-in LCD screen and suitably labeled status LEDs. Relay shall have facility to locally Trip/Close the breaker as a backup to TNC switch provided separately on the panel.

(b) Metering Equipment including:- (i) 01 x Digital Voltmeter (Acc.Cl.0.5), 01 x Digital Ammeter (Acc.Cl.0.5), (ii) 01 x Multi-Function-Meter (Acc.Cl.0.5) shall be provided with LCD display for measuring current, voltage, power, power-factor and energy-parameters, Total Harmonic Distortion and Max. Demand Indication, same shall be communicable on ModBus via RS485 port.

(c) LED Indications :- (i) Breaker ON/OFF/TRIP/Spring-Charged, (ii) Trip Circuit Healthy (iii) R-Y-B (iv) DC available LED with push button. (v) AC Supply fail.

(d) 08-Window Annunciator with Hooter to indicate following alarms :- (i) OC Trip, (ii) EF Trip (iii) Trip Circuit Failure, (iv) Inter-Tripping Fault, The Annunciator will be complete with required Acknowledge/Test buttons as required

(e) Control Equipment incl:- (i) 01 x TNC Switch, (ii) 01 x Emergency Trip Push Button, (iii) 01 x Local/Remote Switch, (iv) MCBs for AC/DC isolation (v) Heater Switch with Thermostat - 01 No (vi) 3-pin socket with ON/OFF switch - 01 No (vii) LED Lamp with ON/OFF switch - 01 No

(f) Flush mounted Auxillary Protection Relays incl:- (i) Trip Circuit Supervision Relay (ii) Master trip Relay (iii) DC Supervision Scheme

Supply, installation and testing in replacement of Numerical Relay feeder protection relay draw out type in HT 11 KV VCB Panel comprising of new and modern numerical scheme for detecting, indicating and tripping the breaker on faults over-current and earth-fault in any of the three phases, Trip circuit supervision relay, 5% pick up for OC and 5% for EF. The relay shall also have the following features as minimum; (i) Programmable rated current 1A & 5A, (ii) Last 8 fault record & 200 event record with time stamping, (iii) 4 analog input, 8 DI & 8 DO, (iv) Communicable on IEC61850 protocol, (v) Disturbance recording upto 300 cycles, (vi) Self supervision function. The relay shall be fully integrated with the feeder, internally capturing feeder statuses if available including Breaker On, Off, Spring Chrged, Test, Service, AC-Fail, DC supervision relay, Trip circuit healthy relay, inter panel tripping, Master trip relay, local remote and display the same locally on a built-in LCD screen and suitably labeled status LEDs. Relay shall have facility to locally Trip/Close the breaker as a backup to TNC switch provided separately on the panel. The relay shall be fixed on new 2mm CRCA sheet of matching existing VCB panel color and suitable size covering all blank space formed by removing old mechanical type IDMT relay complete including associated wiring and integration with existing HT VCB panel complete all as specified and directed. Model No F-300 of Make C&S OR Equivalent.

Supply, installation and testing in replacement of Numerical Relay transformer protection relay draw out type in HT 11 KV VCB Panel comprising of new and modern numerical scheme for detecting, indicating and tripping the breaker on faults over-current and earth-fault in any of the three phases, Trip circuit supervision relay, 5% pick up for OC and 5% for EF. The relay shall also have the following features as minimum; (i) Programmable rated current 1A & 5A, (ii) Last 8 fault record & 200 event record with time stamping, (iii) 4 analog input, 8 DI & 8 DO, (iv) Communicable on IEC61850 protocol, (v) Disturbance recording upto 300 cycles, (vi) Self supervision function. The relay shall be fully integrated with the feeder, internally capturing feeder statuses if available including Breaker On, Off, Spring Chrged, Test, Service, AC-Fail, DC supervision relay, Trip circuit healthy relay, inter panel tripping, Master trip relay, local remote and display the same locally on a built-in LCD screen and suitably labeled status LEDs. Relay shall have facility to locally Trip/Close the breaker as a backup to TNC switch provided separately on the panel. The relay shall be fixed on new 2mm CRCA sheet of matching existing VCB panel color and suitable size covering all blank space formed by removing old mechanical type IDMT relay complete including associated wiring and integration with existing HT VCB panel complete all as specified and directed.Model No F500 of Make C&S OR Equivalent.

Labour and T&P only for Taking out HTcable loop of any size by execavation and taking out all material as required for connecting of cable to new VCB panel including relaying the remain cables in same trench after making connection and testing complete all as specified and directed.

M&L in replacement Earthing complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 3.5 m below normal ground level) with top edge of earth plate not less than 2.5m below normal ground level, connected to galvanized strip 32mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other nuts and washers of galvanised iron side complete all as specified, including testing and commissioning complete all as directed. Note : (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in soft/loose soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 type C2 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement 6mm dia both ways as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe medium grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI lead wire and protection pipe upto 7.5 meter beyond the earth plates electrode.

M&L in replacement for 25x4mm galvanised iron strip for earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in pipe or any other indicated situation for loop earthing etc complete all as specified and directed.

M&L Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of 120 sqmm to 185 sqmm.

M&L Cable end jointing kit for 11 KV (Earthed) grade indoor type heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 Sqmm to 300 Sqmm.

Material and labour for river washed and screened, dry sand for filling in duct below and around underground cables, filling in existing Cable duct in side the sub station situated at differnt location for cushioning of cables and Sand filling under floors or in foundations of transformers including watering and consolidation etc, complete all as specified.

Supply, installation & commissioning and testing in replacement of SHF/VRLA Battery, Battery charge panel comprising 12 Nos. 2 Volts 100 AH tubular cell, self contained floor mounted sheet steel cabinet with two tiers for housing the batteries. The charging equipment will be operated from 240Volt +/- 10%, 50 c/s supply. The cabinet should be complete and internally wired auto/mannual switch. The charger unit should house, resstance control DC ammeter , Voltmeter and fuses, AC supply failure alarm. Complete accessories required for commissioning is included in the scope of work. DC distribution board comprising of 63 Amps DPMCB as incomer and 2 nos of 15 A DP MCB as O/G Battery Charger with batteries Automatic Float cum Bboost charger of 16 A to give 24 V DC output at 60 Ah capacity

Supply and fix Heat shrinkable sleves of size 1/4" to 1/2", Temp 120Degree C, 1 KV. Make 3M/Raychem.

M& L for epoxy resin cast coated on existing currtent transformer to increase the insulation level of CT complete all as specified and directed.

Supply only CRC powerspray liquid 500 ml bottle industrial type. (electro maintenance and protection).

S &F fire retardant/extinguishing electric insulated synthetic mat Insulatica - 2000 of 2.5 mm thick + 10% confirming to BIS : DOC No ET-02(5440) dated 30 Apr 2004, meeting requirement of IS-3043,IS-5216 (Part -I,II &II), IS-8437 and IEC-479 pub-I,tested for breakdiwn strength, tensile/Elongation ageing properties,insulation resistance , effect of acid, alkaline, diesel and transformer oil leakage current test, fire test etc, having minimum width of 1000mm + 20mm including all allied materials such as PU-Resin, chemical bound (Haedener) special PVC adhesive liquid primer etc of required quantity to complete the job as per site requirement of all voltages not exceeding 11 KV system without HT trolley movement.

M&L in replacement mild steel chequered plate 10 mm thick incliding cutting of suitable size for duct cover at site complete all as specified and directed by Engr-in-Charge.

M & L for PCC 1:3:6 type C-2 (using 40 mm gradded aggregate) for foundation, filling and mass concrete etc complete all as specified and directed .

M & L for cement concrete type B-2, 1:2:4, (using 20 mm gradded aggregate) for floors and paving etc complete all as specified and directed.

DHARYA ENTERPRISES

M P TYAGI ENGINEERS AND CONTRACTORS

MV Engineers And Contractors

Vijay Electricals

M/s Birja Nand

Microsys Controls India