SITC of 22/0.433 kV Substation Equipments and allied works at Salem Airport.

Supply of outdoor 22 KV, 50 HZ, 630 Amps, 26.3 kA SC, outdoor type RMG panel with 2 Nos of LBS (Load Break switch) and one No. CT & PT metering compartment with sealing provision (HT Metering Compartment as per TANGEDCO / TNPDCL (DISCOM) requirements) including CT & PT for RMG as per M/s TANGEDCO / TNPDCL specifications and requirements. i) CT ratio : 100-50/5-5A , Metering : Class 0.2s, Burden : 5 VA & Protection : Class 5P20, Burden :15 VA including suitable class PT as per DISCOM / TNPDCL requirement. ii) Panel shall be Designed & tested in accordance with IEC 62271-200 & 100. iii) Supply and laying of 25x5mm copper flat connecting existing earth pit to RMG panel earthing systems.

Installation, Testing and Commissioning of 22kV HT Outdoor RMG panel with LBS and 1 No of metering compartment (HT Metering Compartment for TANGEDCO) including provision of necessary "C" Channel arrangement of size 100x50x6 mm, earthing connections , interconnections, suitable size RCC Foundation of minimum 500 mm height from ground level and panel positioning at site complete as per TANGEDCO/TNPDCL specifications/norms etc., including size (5 Mtr [L] X 4 Mtr [W] X 2 Mtr [H]) metal/chain link fencing with all four sides of RMG panel area with lockable gate (1 Mtr [W]) including suitable channel support foundation arragement complete as required. Note: SITC shall be carried out according to TANGEDCO/TNPDCL (DISCOM) norms/ specifications.

Supply of Indoor Type OEM Fctory Built, floor mounted metal clad, fabricated of 2 mm thick CRCA / Aluzinc sheet, 22 KV, VCB Switch Board panel with 03 Nos. VCBs, free standing extensible on both sides, totally enclosed and electrically interlocked, horizontal drawout on floor, horizontal isolation type confirming to IS / IEC: 62271-100 for breakers & IS / IEC: 62271-200 for panels / switch board, as amended upto date, as per specifications, having capacities as mentioned below, single break, trip free mechanism, electrical and manually charged and closing breaker suitable for use on 22 KV, 3 Phase, 50 Hz AC 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 4 NO + 4 NC and equiped with following switch gears and accessories i/c connections suitable size cable as incomer as well as outgoing feeder inline with tender specifications complete etc. as required. STC 26.3 kA for 3 Sec., Internal ARC test for AFLR 26.3 kA for 1 Sec. as required. The panel shall be complete with suitable surge protection device required for the suitable voltage level and withstanding current as required.

INCOMER i) 01 No. of incomer VCB panel comprising of 22 kV, 630A, Vacuum Circuit Breaker (VCB) ii) Set of 03 Nos. of cast resin insulated dual core dual ratio CT, 22 kV, 75-30/5-5A Core 1: Class 5P10, 10VA, Core 2: Class 0.5, 10VA with digital Ammeter with RS port iii) Set of 03 Nos. Cast resin drawout type PTs 22 kV / 110 V, Class 0.5, 100 VA burden including HT HRC fuse on 22 kV side and MCBs on secondary side protection with digital Voltmeter (Acc. Class 0.5) having selector switches. iv) 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 / Service position / Test position / spring charging 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 annuciator with windows and buzzer, reset push button for electrical faults incomer panel, complete with FRLS wiring, Terminal Blocks cable-ducts, with protection fuses / MCBs.

v) 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;, individual harmonics up to 15th level (complying with IEC 61557-12) with RS 485 / Ethernet port and protection MCBs. and required accessories to complete the system. vi) Numerical protection relay, modular design, protection scheme for detecting, indicating and tripping the breaker on circuit faults like (a) Over current & short circuit 51, 51N & one earth fault element in the three phases, (b) residual and three-phase under-voltages / over-voltages, (c) circuit-breaker-failure alarm, (d) Master-Trip and Trip-circuit supervision vii) ARC flash protection shall be provided: Sensing of any RC produced in any of the 3 chambers i.e. Breaker, Cable and Busbar apart from protection features, along with ARC sensors, fibre cables etc. long with other accessories to complete system.

OUTGOINGS 02 Nos. of outgoing VCB panel comprising of 22 kV, 630A, Vacuum Circuit Breaker (VCB) as transformer feeder each comprising of following; i) Set of 03 Nos. of cast resin insulated dual core dual ratio CT, 22 kV, 75-30/5-5A Core 1: Class 5P10, 10VA, Core 2: Class 0.5, 10VA with digital Ammeter with RS port for each breaker. ii) 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 / Service position / Test position / spring charging 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 annuciator with windows and buzzer, rest push button for electrical faults incomer panel, complete with FRLS wiring, Terminal Blocks cable-ducts, protection fuses / MCBs for each breaker. iii) 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;, individual harmonics up to 15th level with RS 485 / Ethernet port and protection MCBs. and required accessories for each breaker. iv) Numerical protection relay, modular design, protection scheme for detecting, indicating and tripping the breaker on circuit faults like (for each breaker)

(a) Over current & short circuit 51, 51N & one earth fault element in the three phases, (b) Three phase under / over voltage protection, (c) Transformer auxciliary protection, OTI / WTI alarm, (d) Master-Trip and Trip-circuit supervision v) ARC flash protection shall be provided: Sensing of any RC produced in any of the 3 chambers i.e. Breaker, Cable and Busbar apart from protection features, along with ARC sensors, fibre cables etc. long with other accessories to complete system. BUSBAR 800 Amp TP, 22 kV Air insulated and encapsulated copper bus bar of suitable size as per panel configuration & 2 Nos. of 25 x 5 mm copper earth strip, BATTERY & BATTERY CHARGER 230V, single phase AC system battery charger for 24V DC Batteries, charger with semiconductor / IGBT full wave rectifier with auto / manual float cum boost facility complete with suitable capacity 24V DC, 120 AH sealed maintenance free batteries as per OEM design including one no. distribution board having 32 Amps DP MCB as incomer and 6 Nos. 20/16A DP MCB's (D.C duty) as outgoing complete as required and as per technical specifications.

All The above from (2.01) to (2.05)