Replacement of Old HT OCB panels at Substation I and II at Begumpet Airport Hyderabad.

Amount

SITC of 11KV 630A 26.3KA Indoor HT VCB 3 Panel Board

Supply, Installation, Testing and Commissioning of 11KV indoor type floor mounted metal clad VCB Panel, fabricated of 2 mm thick CRCA/Aluzinc sheet, with (03) Nos. VCBs, totally enclosed & electrically interlocked, horizontal drawout on floor, horizontal isolation type VCB as per IEC62271-100 for breakers and 200 for panels/ IS3247 of switch board, as per specifications, having capacities as mentioned below, single break, trip free mechanism, electrical and manually charged and closing breaker suitable for use on 11 kV, 3Phase, 50Hz A.C. supply , complete with self contained electrically interlocked rack in and rack out mechanism, air insulated and encapsulated copper bus bars, breaker featured with mechanical ON/ OFF indicator with hand trip device, spring release coil, shunt trip coil and auxiliary switch of 4NO + 4NC and equipped with following switchgears and accessories i/c connections suitable for 1 R X 3C X 300 sq.mm. XLPE 11 kV cable as incomer as well as outgoing feeder. STC 26.3 kA for 3 sec , Internal Arc Test for AFLR 26.3 kA for 1 sec. at individual compartments i.e. Busbar, VCB and cable compartment. Separate earthing truck shall be required for each bus earthing & cable earthing. Earthing truck shall be so designed that it is impossible to earth a live. It shall be provided with capacitive voltage divider and complete with audio visual annunciation, one for each panel. (noted: cost of end termination are not included in this Item s & cable entry from bottom considered).

The panel shall be complete with suitable surge protection device required for the suitable voltage level and withstanding current.

01no. Incomer VCB Panel each comprising of

11kV, 630A, Vacuum Circuit Breaker

Current Transformer: 11KV Epoxy Cast Resion Type Single Phase CTs. 200/1-1A (SITC 25KA/1Sec) CORE 1 - CL 0.5 15V CORE 2 - CL SP10 15VA - 3 Nos

Single phase 11 KV Potential C ast Resin Potential Transformer FIXED TYPE 11KV/√3/110/√3 C-1 CL 0.5 50VA- 3 set.

Breaker control switch 240 V AC, spring charging motor 24 V, DC Shunt/tripping coil/closing coil Lockable type, inbuilt power pack for closingcoil and Tripping coil , Trip/Neutral/Close (TNC) Switch, Set of ON/OFF/TRIP indicating, Set of R/Y/B Phase indicating lamps, Clear lamp for Trip Circuit healthy supply & Trip Circuit fails, DC Control Supply healthy & fails, indicating lamps. LED Illumination lamp ON / OFF with limit Switch, space heater with switch 6/16 amps 5 Pin switch socket outlet, control terminal as required. Auxiliary contact for Aux. relays for Anti Pumping & indication, electrically/Mechanically interlocking etc. as required, 8 window alarm annunciator with windows and buzzer, ack, rest, rest push button for electrical faults in incomer panel, complete with FRLS wiring, Terminal Blocks, cable-ducts, protection MCBs.

01 No. for each breaker:- Digital Multifunction Meter, accuracy class 0.5s, with LED/LCD screen of Max Demand Load, I ;V; Hz; Active, Reactive , Apparent Power & Energy; Power factor; % unbalance of current & voltage; , %THD , individual harmonics up to 15th level (complying with IEC61557-12) with RS 485 / Ethernet port and protection MCBs. and required accessories to complete the system.

Numerical Protection Relay, modular design , confirming to IEC 60255, protection scheme for detecting, indicating and tripping the breaker on critical faults like (i)over current & short circuit 51,51N & one earth fault element in the three phases, (ii) negative sequence currents due to line-to-line or conductor-break faults, (iii) residual and three-phase under-voltages/over-voltages, (iv) circuit-breaker-failure alarm, (v) tripping-circuit-failures and interpanel tripping/blocking signals via GOOSE based peer-to-peer communication, on IEC61850 protocol. (vi) Master-Trip and Trip-Circuit Supervision The relay shall be integrated with the feeder, capturing status like Breaker On/Off/Spring. Charged/Test/Service/AC-Fail, Line-Current, Line-Voltage etc. and display the same on graphical display (MIMIC), remote communication on IEC61850 platform on Ethernet. Arc Flash Protection Shall be provided: Sensing of any ARC produced in any of the 3 chambers i.e. Breaker, Cable and Busbar apart from Protection features, along with arc sensors , fibre cables etc. along with other accessories to complete the system.

02 nos. Outgoings VCB Panel each comprising of

11kV, 630A, Vacuum Circuit Breaker

Current Transformer: 11KV Epoxy Cast Resion Type Single Phase CTs. 100/1-1A (SITC 25KA/1Sec) CORE 1 - CL 0.5 15V CORE 2 - CL SP10 15VA - 6 Nos

Breaker control switch 240 V AC, spring charging motor 24 V, DC Shunt/tripping coil/closing coil Lockable type, Trip/Neutral/Close (TNC) Switch, Set of ON/OFF/TRIP indicating, Set of R/Y/B Phase indicating lamps, Clear lamp for Trip Circuit healthy supply & Trip Circuit fails, DC Control Supply healthy & fails, indicating lamps. LED Illumination lamp ON / OFF with limit Switch, space heater with switch 6/16 amps 5 Pin switch socket outlet, Control terminal as required. Auxiliary contact for Aux. relays for Anti Pumping & indication, electrically/Mechanically interlocking etc. as required, 8 window alarm annunciator with windows and buzzer, rest, rest push button for electrical faults in incomer panel, complete with FRLS wiring, Terminal Blocks, cable-ducts, protection MCBs

01 No. for each breaker:- Digital Multifunction Meter, accuracy class 0.5s, with LED/LCD screen of Max Demand Load, I ;V; Hz; Active, Reactive , Apparent Power & Energy; Power factor; % unbalance of current & voltage; , %THD , individual harmonics up to 15th level (complying with IEC61557-12) with RS 485 / Ethernet port and protection MCBs. and required accessories to complete the system.

Numerical Protection Relay, modular design , confirming to IEC 60255, protection scheme for detecting, indicating and tripping the breaker on critical faults like (i)over current & short circuit 51,51N & one earth fault element in the three phases, (ii) negative sequence currents due to line-to-line or conductor-break faults, (iii) residual and three-phase under-voltages/over-voltages, (iv) circuit-breaker-failure alarm, (v) tripping-circuit-failures and interpanel tripping/blocking signals via GOOSE based peer-to-peer communication, on IEC61850 protocol. (vi) Master-Trip and Trip-Circuit Supervision The relay shall be integrated with the feeder, capturing status like Breaker On/Off/Spring. Charged/Test/Service/AC-Fail, Line-Current, Line-Voltage etc. and display the same on graphical display (MIMIC), remote communication on IEC61850 platform on Ethernet. Arc Flash Protection Shall be provided: Sensing of any ARC produced in any of the 3 chambers i.e. Breaker, Cable and Busbar apart from Protection features, along with arc sensors , fibre cables etc. along with other accessories to complete the system.

Busbars

800 amps TP, 12KV air insulated and encapsulated copper Bus bar of Suitable size as per panel configation.

SITC of 11KV 630A 26.3KA Indoor HT VCB 3 Panel Board AS ABOVE

supplying and making indoor cable end termination with heat shrinkable jointing kit complete with all accessories including lugs suitable for size of 3 core X 240 Sq.mm, XLPE aluminium conductor cable of 11 KV grade as required

supplying and making indoor cable end termination with heat shrinkable jointing kit complete with all accessories including lugs suitable for size of 3 core X 300 Sq.mm, XLPE aluminium conductor cable of 11 KV grade as required

Dismantling of Existing HT OCB Panels including dismantling of Incomming and outgoing cables etc. and shifting to AAI store as per Instructions of EIC.

SARASWAT ENGINEERING SERVICES (BID ID -836683)

Shiva Enterprises (BID ID -836895)

vk sam engineering (BID ID -836601)

Mastsya green Enviro Private Limited (BID ID -836934)