REPAIR AND MAINTENANCE OF HT SWITCHGEARS, HT CABLE DISTRIBUTION SYSTEM WITH PROTECTION SYSTEM WITH ALIIED WORKS AT CVD, PIRU VIHAR DIPAC, HQ TG, VIKRAM BATRA LINE, CMP LINE, CHITRAL LINE, BASANTAR LINE, EME UNIT LINE, KABUL LINE, BAIRD PLACE, KOTWAL

Amount

Material and labour for servicing /testing of breaker/control panel including CT/ PT and relays in control panel of VCB of capacity 630-800 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 (xvii) Checking, cleaning, tightening , testing the busbars incl bus chambers,support insulator, Spouts, CT/PT etc.

(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. (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

Supplying, installation, commissioning and testing in replacement of 11 KV Current Transformer (CT`s), indoor type, resin cast epoxy type, of 13.1 KA/Sec having ratio 200/100/5-5 Amps having Core1: Class 5P10, 10VA for protection , Core2: Class 0.5, 10VA for metering including associated wiring complete all as specified and directed by Engr In Charge.

All as per item No 2 here-in-before but having ratio 150/75/5-5 Amp

All as per item No 2 here-in-before but having ratio 100/50/5-5 Amp

Supplying, installation, commissioning and testing in replacement of PT unit three phase, three limbs, upto 11 KV draw-out type, resin cast dry type, single ratio having primary voltage 11 KV & secondary voltage 110 volts, 50 VA class-1 including necessary bus bar connections & wiring for metering complete all as specified and directed by Engr In Charge.

S&F in replacement of LED indication lamp 24/110 Volts for breaker ON/OFF/TRIP/Breaker Spring Charged/R-Y-B etc for 11 KV control panel including associated wiring, if reqd, complete all as specified and directed by Engr In Charge.

Supply and installation in replacement Anti-condensation space-heater withThermostatic control in cable and circuit breaker compartments of HT switchgears complete all as specified and directed.

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

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

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

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

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

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

Supply and fix in replacement close/trip coil 24V DC for 11 KV HT VCB of capacity 630/800 Amps capacity all as specified and directed.

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

Supplying & Fixing in replacement auxillary switch (7 No + 7NC) suitable for 630/800 amps, 11 KV HT VCB complete all as specified and directed by Engr In Charge.

Supply and fix in replacement TNC 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 by Engr In Charge.

Supplying & Fixing in replacement support rod with screws suitable for 630/800 amps, 11 KV HT VCB complete all as specified and directed.

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

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

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

Supply & fix in replacement only set of 6 Nos fixed arcing contacts suitable for 630/800 amps, 11 KV HT VCB complete all as specified and directed by Engr In Charge.

S&F in replacement Caution plate “CAUTION MEN AT WORK of size 40cmx15cm made out of white acrylic sheet with Red coloured glow tape.

S&F in replacement of HRC fuse of capacity 20 Amps for VCBcomplete all as specified and directed by Engr In Charge.

S&F in replacement MCB 20 to 32 Amps SP , curve 'B' complete all as specified and directed by Engr In Charge.

S&F in replacement of Digital Volt meter Secondary voltage 110 V for 11 KV VCB Control Panel complete all as specified and directed by Engr In Charge. Note for item no-26 & 27:- The volt meter/ Amp meter shall be fixed on new 3 mm thick bakelite sheet suitable size covering all blank space or cutting the sheet of panel for installation the same (if necessary).

Supplying ,fixing , testing of PT fuse failure relay , 110 Volt AC in control panel including wiring complete all as specified and directed by Engr In Charge.

Supply and fixing in replacement of HT Fuse of cap 63 amp (barrel type) suitable for load break switch complete all as specified and directed by Engr In Charge.

Supply, installation and testing of Numerical Relay draw out type in replacement of any 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 & 4 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, 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 or any type complete including associated wiring and integration with existing HT VCB panel complete all as specified and directed.

Supply installation & commissioning in replacement of 24V/40A Float Cum Boost Battery Charger unit including battery bank comprising 12 Nos of 2 Volts-120 AH sealed maintenance free battery. The CCCV battery charger consisting of copper wound, air cooled transformer, 01 Set single phase full wave bridge rectifier consisting of diodes and SCRs, liberally rated mounted on heat sink and complete with resistor/condenser network for surge supperssion . During auto float mode automatic changeover shall take place from float mode to boost mode and vice versa, 01 Set of solid state constant potential controller to stabilize the DC output voltage of the float cum boost charger, 01 No electronic controller , DC digital ammeter , DC digital voltmeter, Potentiometer , DC, MCB for reverse battery protection . The charger should have alarm annunciation with visual and audible alarm with manual reset facility for fuse fail alarm. Float cum boost battery charger and DC distribution board shall be housed in powder coated sheet steel cubicle with panels of 1.6mm thickness , louvers for ventilation , gland plate will be provided for cable entry from bottom . The battery charger shall be divided into two compartments. The upper compartment shall house the battery charger & DCDB with all necessary controls. The lower compartment shall be suitable for housing the batteries. Tech specification shall be as under:-

(a) Input working voltage-180 -270 Volts (b) Nominal Input Voltage - 230 V , AC , 50 Hz,1 (c) On load input power factor - > 0.8 (d) On load unit watt efficiencies-> 80% (e) No load losses of complete charge-< 10% (f) Ripple contents on the load (RMS)= 1% to 5% (g) Over load - 110% for 30 minutes and will give visual indication for over load condition. (h) Boost charging - 2.4 V/Cell . (j) Float charging -2.15 V/Cell (k) Float cum boost charging-Automatically changes from one state to another state as per battery condition and will give the visual indication for either float or boost based on charging mode. (l) Reverse polarity -No damage will caused . A visual indication for reverse polarity will appear with an audio alarm. (m) Short circuit-MCB protecton provided. Make of battery charger. Statcon/Sinetrac/Amar Raja Make of batteries. Exide/Amaron/Okaya

Supplying, installing, testing and commissioning in replacement of Indoor arc flash protected Draw-Out with roll on floor type Vacuum Circuit Breaker HV compartment , rated for 11kV,800 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 800 Amp, continuous rated Aluminium 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, 800 Amp, 25 KA/3-sec, Draw-Out Vacuum Circuit Breaker as per IEC-62271-100. Vacuum Circuit Breaker having 03 nos. 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 HV compartment of any make. (ii) All retrieved items shall be returned to store yard of MES

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. Make:- ABB, Schneider, C & S , CG

(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) 06-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

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 m deep in soft/loose soil) for laying of cables or GI pipe and getting out including levelling of bottom suface to required level complete all as specified and directed

Material and labour for river washed and screened, dry sand for filling in trenches below and around underground cables for cushioning of cables etc, complete all as specified.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300mmx 180mm x 40mm.

Laying only old HT cable cover obtained from excavation complete all as directed.

Returning filling in,. including spreading, levelling, watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 m away and depositing where directed at a level n. exc. 1.5 m above the starting point complete all as specified and directed.

Supplying, laying, testing and connecting in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 11 KV grade, IS 7098 marked, suitable for HT 11 KV(E) system, laid in trenches / ducts / encased in GI pipe / fixed to pole or against re-routing / diversion from residential buildings/ road/ footpath etc complete all as specified and directed by Engr In Charge, including jointing & testing complete all as specified and directed of following sizes:-

120 sqmm 3 core.

150 sqmm 3 core.

185 sqmm 3 core

240 sqmm 3 core

Boring of hole under road/pavement/hard standing or any other situation by mannual means and suitable for passing of GI pipe 80 to 100 mm bore and making good both ends all specified and directed

Supply and lay GI pipe light grade in replacement as cable protection laid on trench/floor, fixed on pole/wall etc of size100 mm dia all as specified.

All as per item No 42.0 here in before but of size 80 mm dia.

Supply and fix 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 following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm 3 core

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm 3 core

Supply and fix in replacement air break switch gang operated tripple pole mechanically operated mechanism, switch air break gang operated mounted on 15 Nos insulator and steel frame with operating rod of 25 mm bore GI Pipe and locking arrangements worked from ground level for current rating 400 Amps, HT 11 KV grade including drop out fuses and necessary silver coper coating jumpers and making all electrical connections complete.

M & L for 2 coat of aluminium painting over a coat of red oxide to steel surfaces of HT 2/4pole sturcture (Angle Iron/MS channel /MS clamp etc) including preparation of old surface complete all as specified.

All as per Serial item No 48.0 here-in-before but 6/8 pole structure incoming/outoing feeder

Material & Labour for replacement of jumper/bus bar made of ACSR conductor of existing size of any length on HT 4 to 8 pole structure having incoming/outoing feeders including bus bar with PVC sleeve , lugs , nut bolts and washers complete all as directed.

S&F in replacement Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers,welding, bending cold or hot,drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of aluminium paint on 4/6 pole 11 KV HT structure

Material and labour for spreading of stone aggregate of size 25 mm under 4/6 pole HT structure /surounding area of outdoor RMU manually without damaging any equipments, cable or parts , spreading & levelling of finished gravel uniformaly in layers n. exc. 15 cm thick spread to true surface all as specified and directed

Re-Adjustment, Cleaning of Contact, greasing and testing of out door type Air break switch 11 KV, current rating upto 400 Amps for desired alignment to smooth operation from ground level and replacement of unserviceable parts in position. Note : Replacement of unserviceable parts shall be measured and paid separately under relevant items, complete all as specified and directed.

Supplying and fixing in replacement male contact/moving contact for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement female contact /fix contact jaw for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement tinned copper flexible jumper 200 Amp/400 Amp for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement MS jumper carrier for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement back connector plate for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement porcelain post insulator for gang operated air break device 11 KV complete all as directed at site by Engr-in-charge.

Supplying and fixing in replacement drop out fuse element 5 to 25 Amp complete all as directed at site by Engr-in-charge.

S&F in replacement disc type insulator,porecelain, viterous 145mm high and 255mm dia ball and socket type , brown tow in series assembly for tension with tension clamps for conductors, working presseue 11000 volts complete all as specified and directed.

S&F in replacement pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers,nut size 150 mm height 150mm dia, 11000 volts grade complete all as specified and directed.

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

Demolition of path /concrete in ground floors and pavings n exc 15 cm thickness (below or above ground level) complete all as specified and as directed.

Material and labour for Cement Concrete type C1,1:3:6 mix(20mm graded aggregate) 150mm thick, finishing the top surfaces fair and even complete all as specified and as directed.

Material and labour for painting of HT load break switch, out door/in door of size not more than 6.0 Sqmtr floor mounted installed at different locations including preparation of exposed surface by removing old paint from the body, cleaning the surface with thinner and applying two coats of synthetic enamelled smoke grey paint on both side of doors, inner/outer side etc complete all as specified and directed.

M&L for painting with two coats of superior aluminium/smoke grey paint or as existing including necessary preparation of surfaces of steel fencing by brushing/cleaning complete with steel structure/wire mesh/frame/ gate for 11 KV transformer/2 pole to 8 pole structure/ HT panels/Sub Station complete all as specified and directed.

Material and labour for Brick work with sub-class 'B' bricks, straight or curved on plane exc 6 m mean radius, built in cement mortar 1:6 complete as specified and directed including dismantling of old unserviciable brick work.

Material and labour for Rendering 15mm thick on fair faces of brick work or concrete surfaces in cement mortar (1:4) finished fair and even without using extra cement complete all as specified and directed including

Supplying and fixing (in replacement) 4 mm dia MS wire 75x75mm mesh, made upto into mattress or cages appx 1.8 to 2.00 m height and fixed with flat iron/angle as per existing by welding in position complete all as specified and directed

Material and labour for two coats of synthetic enamel paint of silver colour on steel surfaces over a coat of red oxide primer including preparation of surfaces complete all as specified.

S&Fin replacement of framed bracket of angles or tees with web and flanges cut to shape, drilled and countersunk for screw, including bending and welding angles as necessary gusset plates, riveting etc as in fencing post including cutting tops to shape as directed, drilling holes, notching for wire etc complete all as specified and as directed..

M&L PCC 1:3:6 (typeC2) using 40 mm graded stone aggregate as in foundation filling and mass concrete complete all as specified and as directed.

Suplying and laying as replacement in sub station fixing 3.3 to 11 KV electrical insulation mat of size 5 mtr x 1 mtr x 2.5 mm thick specification as per IS 15652 2006

Material and labour for preparation of painted surface of floor mounted HT control panel for fixing of FLOURCENT REFELCTIVE LETTERING as follows of approved colours all as specified and directed . (a) Re-write the details of O/G or I/C fedeers, Sl No of HT Panel, CTR etc on the HT panels in capital letters of size not less than 35 mm width and 45 mm height and works not exceeding 70 letters per panel. (b) Numbering of the HT Panels in both front and back side of size not less than 80 mm width and 80 mm height. Name of O/G or I/C feeders should be written on backside of HT Panel also as size mentioned in (a) above.

Earthing complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 2.25 m below normal ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to GI Strip 32 mm x 6 mm 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 ironside 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 any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement 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 for cutting and removing grass, vegetation bushes etc from surrounding 4 pole/6 pole HT structure , outside area of HT installation and removing all rubbish to a distance not exceeding 50 m as directed.

Supply & Fixing in wall of sub stn , in replacement of Exhaust Fan of size 450 mm sweep,1400 RPM, copper wounded with MS blade complete with louver all as specified and directed.

Supply & Fixing in replacement of spout insulator (for Bus Bar/feeders) suitable for 400/630/800 Amps ,11 KV HT VCB complete with louver all as specified and directed.

NOTE :-(i)contractor should provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Eng-in-charge.

INDIAN CONSTRUCTION CO.

mayur enterprises

Rajindera Enterprises

Vijay Electricals

M/s JAIMAA ASSOCIATES