Fan and cooling coil Overview Fan and cooling coi B4-DV17A Bevel-helical speed reduction gearboxes B4

Flender/Flender Gear Units/Bevel-helical speed reduction gearboxes B4

uit All relays shall be in drawout cases and with mechanical hand eset operation indicator. Above relays shall be provided to detect fault in any of the feeders. separate over volage relay shall also be provided in DCDB. Over voltage setting of he / relays shall be variable type with range of 1 1 . The following indications shall be provided. AC supply ON (for 3 phases sepa rately) for each charger DC supply ON for charger Boost/float mode ON for charger Supply ON for each outgoing distribution feeder Each outgoing circuit shall be connected to bus bars. Each outgoing circuit shall have MCCB. The no. of outgoing circuits shall be as per the requirement plus 1 nos. for purchasers use and 2 % spare. The following measurement shall be provided; AC input voltage and current of each charger (through voltmeter /ammeter /) DC output voltage and current of each charger Battery charging/drain current of each charger with necessary hunt Battery trickle charging current (through amplifier) DC bus voltage (through selector switch) to measure between Pos itive to Earth, Negative to Earth & positive to negative. DC voltage and DC current transdu cers (4-2 mA) shall also be rovided as per requirement of the DC system. DC Voltmeter range 0-1V shall lso be provided with selector switch to meas ure +/earth and -/earth voltages. Static type annunciation shall be provided for the following; AC supply failure to charger Battery earth fault (+ve &-ve separately) Float bus over/under voltage Boost bus over voltage Boost over current for each charger Failure of thyristor/diodes for each charger Failure of blocking diode Output MCCB open for each charger 1 of 1 INDRADHANUSH GAS GRID LIMITED TECHNICAL SPECIFICATION FOR NATURAL GAS COMPRESSOR STATION FOR NORTH EAST GAS GRID PIPELINE PROJECT ______________________________________________________________________________________________ TS NO.: MEC//2UU/0/2/0