action forces in the coupling must be checked for B4-CH-18-A Bevel-helical speed reduction gearboxes B4

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

The output voltage required can be set externally through potentiom eters in the range 9-1% steplessly. In boost mode, the charger shall be suitable to operate in co nstant current as well as constant voltage mode with manua selector arrangement, contr oller suitable for two-rate charging. The charging current shall be externally adjustable rom 2 to 1% steplessly. , & boost chargers shall be identica such that they can be interchangeable. Provision of charging with manual control of output voltage sha ll also be provided. Electronic current limit, adjustable between 8-1% of rated urrent shall be provided. During boost charging, the charger shall be cut-off as soon as over voltage occurs. Ripple content in the charger' output voltage shall not exceed 0.5% in float mode and 3% in boost mode. Provision shall be provided to isolate the battery from the chargers. MCB may be provided for this purpose. The supply to the charger will be at 4V + 1%, 5 Hz. Charger shall be suitable for frequency variation as per IS. Charger shall have separate over voltage relay with variabl setting from 1 % to 1 % in steps of 5 % of . DC Distribution board The DC distribution board shall have double bus bar arrangement . The DCDB shall be provided with all the instruments, AC/DC meters, indicating lam ps, relays and other accessories. The following relays sh all be provided: AC input supply to charger failure Earth fault Float bus over and under voltage Boost bus over voltage 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 Electrical system Chapter-0.0 2, MECON Limited, All Right Reserved Pag 1 of 2 Boost over current for ach charger circ