PROVN OF ISOLATION TRANSFORMER IN TECH AREA AT AF STN BAGDOGRA UNDER GE (AF) BAGDOGRA

Amount

Supply, installation, testing and commissioning of Isolation Transformer, 125 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 75 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 25 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 20 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 15 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 10 KVA, 3 Phase, 50 Hz, indoor type, Copper Wound, Oil cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 415V, + - 5% and Output Voltage range 415V, + - 5%, with ratio of 1:1, Vector Group : Dyn 11, Delta - Star with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 5 KVA, 1 Phase, 50 Hz, indoor type, Copper Wound, air cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 240 V, + - 5% and Output Voltage range 240 V, + - 5%, with ratio of 1:1, first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with high low cut off and over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 2 KVA, 1 Phase, 50 Hz, indoor type, Copper Wound, air cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 240 V, + - 5% and Output Voltage range 240 V, + - 5%, with ratio of 1:1, with first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with high low cut off and over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply, installation, testing and commissioning of Isolation Transformer, 1 KVA, 1 Phase, 50 Hz, indoor type, Copper Wound, air cooled, Class of insulation A, metallic body powder coated designed for Input Voltage range 240 V, + - 5% and Output Voltage range 240, + - 5%, with ratio of 1:1, first filling of transformer oil of requisite dielectric strength upto level, efficiency more than 95%, separate neutral bushing shall be brought out for earthing. Potential difference between neutral to earth less than one volt with all standard fittings like, digital temperature meter, adequate number of cooling radiators, lifting hooks one set, Earthing terminals two nos complete with high low cut off and over load/ short circuit phase sequence protection alongwith by pass arrangement and testing as per BIS 9815 all as specified and directed.

Supply and fixing of submain wiring with four runs of single core PVC insulated unsheathed, multistranded flexible copper conductor 1100Volts grade, FRLS type, cables 4 Sqmm for 3 phases and neutral drawn through and including concealed rigid PVC heavy duty conduits including two runs of 4 Sqmm 1100Volts grade, FRLS type, PVC insulated unsheathed multi stranded flexible copper conductor cable as continuous earth wire and connecting to common earth terminals as per site requirement complete all as specified and directed.

Supply and fixing of submain wiring with four runs of single core PVC insulated unsheathed, multistranded flexible copper conductor 1100Volts grade, FRLS type, cables 2.5 Sqmm for 3 phases and neutral drawn through and including concealed rigid PVC heavy duty conduits including two runs of 2.5 Sqmm 1100Volts grade, FRLS type, PVC insulated unsheathed multi stranded flexible copper conductor cable as continuous earth wire and connecting to common earth terminals as per site requirement complete all as specified and directed. Note (For Srl No. 10 to 11) :- (i) Four runs of cables for three phases and neutral and two runs of continuous earthing cable drawn through and including in PVC conduit/ casing caping will be measured as one unit length of sub main. (ii) PVC conduit and its accessories is deemed to be included in this item rates. (iii) Unit rate include for cutting chases for conduits and sinking for boxes and making good to wall, floors etc.

Supply, laying and testing cable XLPE Insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 6.0 sqmm, 2 core complete all as specified and directed

All as per item No 12 above, but for size 16 sqmm, 4 core complete all as specified and directed.

All as per item No 12 above, but for size 50 sqmm, 3½ core complete all as specified and directed.

All as per item No 12 above, but for size 70 sqmm, 3½ core complete all as specified and directed.

All as per item No 12 above, but for size 95 sqmm, 3½ core complete all as specified and directed.

M/s Prakash Traders

M/s Chakraborty Enterprise

M/S Banerjee construction co

SREE SWAPAN KUMAR GHOSH

M/S MANAS MITRA

HALDER ENTERPRISERS

SHRI P P SHARMA

SUNIL DAS AND CO