131/ETC-II(P)/ 2021-2022

Amount

The following work is required for smooth operation of cooling fan installed on 20 MVA T/F-II at 132 KV S/S YPC Praygaraj. The details of work listed below.

Supply and fixing of Winding temperature indicator(analog type) of temp range from (0-150) 0C, 5A, AC/DC both and consist of two flexible capillary tubes of 05 meter long and 04 no mercury bulb switch for alarm, trip and cooling control system of power transformers of standard make. Work includes fixing of capillary inside the temperature sensing element within the tank and proper termination of connection at both end.

Supply and fixing of Oil temperature indicator (analog type) of temp range from (0-150) 0C, 5A,AC/DC both and consist of two flexible capillary tubes of 05 meter long and 02 no mercury bulb switch for alarm & trip of power transformers of standard make. Work includes fixing of capillary inside the temperature sensing element within the tank and proper termination of connection at both ends.

Supply and fixing of 01 no main switch of 3P/1W, 415V, 16 A rating and 01 no MCB of 4 pole,415 V,16 A rating for 3 phase incoming supply for cooling fans.

Supply and fixing of 01 no,415 volt,16 A,4NO,contactor for main supply of cooling fans installed on 20 MVA T/F-II .Work includes proper connection of contactor with ACDB or AC cubical installed in the switchyard.

Supply and fixing of 02 no fan control contactors of rating 230v,9A,08 NO,for auto function of cooling fans and 03 no relays of rating 230 V, 9A, 02 NO+02NC for supply monitoring for cooling fans.

Fixing of 08 no, 3 pole MCB of rating 230 V, 2A, on the rail fixed on the front side of marshaling box.( MCB provided by department free of cost ).

Supply and fixing of 08 no overload relay (Type 3US5000) of rating (0.5-2A) for cooling fan of transformers on the front side of the marshaling box.

Wiring of all interconnection with proper ferrules and lugs of suitable size with 4 mm2 flexible insulated copper conductors for power connection and with 2.5 mm2 flexible insulated copper conductor for control connection in the marshaling box. Work includes supply and fixing of cable gland(19mm dia), wire, rail base, ferrule, lugs as required for proper operation of marshaling box.

Supply and fixing of 03 no time delay relay (ON DELAY), of rating 230 volt, 1CO for fan failure indication and stand by fan on indication of standard make.

Supply and fixing of 08 no fan control switches for on/off control of fans (ON/OFF) of ratings 415 V, 10A of standard make.

Supply and fixing of 08 no fan control contactors of type 3TS30 and rating 230 V,9A,6NO+2NC for control operation of cooling fans of standards make .

Preparation of Interconnection drawing & Modification in marshaling box, wiring for new control and switching equipment to be installed in the cubical box. The work includes submission of drawing, Connection/ Termination as approved by department. ( In 3 copy)

Providing and fixing of terminal block (B3/M3 stud type) of rating 415 V, 32A, for interconnection of fan control circuit, auxiliary protection (OTI, WTI, Buchholze, OTI, PRV,) from field to relay panel, and also for annunciation for indication of type of faults. All material provided by contractor at his own cost.

Supply and fixing of 01 no door switch of push off type with rating 230 V,2A, and 01 no panel lamp(LED) of 230 V,8W for proper illumination inside the marshaling box.

Supply and fixing of 01 no ,5pin socket switch box ,01 no heater switch ON/OFF type, of 230 V,6A, 01 no,230 V,40W heater with metal glad and 01 no thermostat of rating 230V,(0—100C0) in side of marshaling box. Work includes proper wiring of given sockets and switches.

M/S Maa Enterprises

NEELAM ENTERPRISES