Mahanadi Coalfields Limited Tender

Labour Charge for dismantling of old Current Transformer and for fitting of New Current Transformer along with connection and wiring.

Providing and fixing 50 mm X 5 mm Copper strip on surface or in recess for connections etc. as required.(Jointing shall be done by overlapping and with 2 sets of G.I. nut bolt & washer spaced at 50mm).

Supply of Numerical Relay, 3 Phase Over Current with Earthfault and Highset, display etc with following specification:- 1.Rated Current-1A or 5A (Field selectable) 2.Rated Frequency 50Hz ± 2.5 Hz 3.Relay Settings: a) Over Current (Is)=20-200% Step 5% b) High set Over Current (Ihs)= (0.2 to 40) X In step of 0.2 In or disable c) Earth Fault (Os)= 5-80% Step 5% d) High set Earth fault (Ohs) (0.1 to 20) x On step of -0.1 On or disable Time Characteristics available -NI, VI, EI, Definite Time TMS : 0.1 - 1.6 Step 0.05 4.Burden Less than 0.25 VA/ phase at CT inputs Less than 10 VA at Auxiliary Power supply 5.Separate LED indications for: a) Power on b) Trip status for R, Y, B & E (These LEDs blink when input crosses set point and become steady on when relay has tripped. LEDs have to be manually reset) c) 4 digits, seven segment LEDs for parameter display 6) Built in self supervision & self testing feature to ensure continuous reliability 7) Display of currents, settings, Trip data & Trip history for analysis & trouble shooting

Labour Charge for fitting of Relay including connection and wiring etc.

Testing over current & earth fault protective relay 3.3KV with NABL Accreated Equipments.

Structural steel work riveted, bolted or welded in built up sections, trusses and framed work, including cuttinB, hoisting, fixing in position and applying a priming coat of approved steel primer all complete

Providing with fixing of Ammeter(3 Phase 3 Wire with 4 digit LED display), True RMS, 64 samples per cycle 1 sec update time with following specifications: 1..Input Current- -/5A and -/1A site selectable, CT Primary and Secondary user programmable for LT and HT applications 2.Aux voltage-80 - 300V AC 3. Panel cutout-92 x 92 mm 4.Burden: 0.2VA max per phase 5.Detailed data sheet with diagram should be provided. 6.CE, RoHS Certified.

Providing with fixing of Voltmeter (3 Phase 3 Wire with 4 digit LED display), True RMS, 64 samples per cycle 1 sec update time with following specifications: 1.Input Voltage-50 - 550 VL, PT Primary and Secondary user programmable for LT and HT applications, Burden: 0.2VA max per phase 2. Aux voltage-80 - 300V AC 3. Panel cutout-92 x 92 mm 4.Burden: 0.2VA max per phase 5.Detailed data sheet with diagram should be provided. 6.CE, RoHS Certified.

Multifunction meter with three screen display showing-Voltage(Phase to phase, Line voltage, Average current, Frequency, Power Factor, Active Energy Received, Total KVA, Phase currents, etc. 1.Input Voltage-50 - 550 VL, PT Primary and Secondary user programmable for LT and HT applications, Burden: 0.2VA max per phase 2.Input Current- -/5A and -/1A site selectable, Current range from 10% to 120% of In (50mA-5A), Starting current : 0.4% of full scale 3.Aux voltage-80 - 300V AC 4. Panel cutout-90 x 90 mm 5.Burden: 0.2VA max per phase 6.Detailed data sheet with diagram should be provided. 7.CE, RoHS Certified. 8.Detailed data sheet with diagram should be provided.

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