flender uae H2DV-27-C Helical speed reduction gearboxes H2

Flender/Flender Gear Units/Helical speed reduction gearboxes H2

and their bus- coupler will be provided with he following features through appropriate selector switch. 2.1 Auto Mode For prolonged under voltage on any one of the bus sections, the respective incoming breaker will trip and the bus coupler breaker will close provided the other bus section is healthy and bus coupler is selected for auto changeover. Total changeover time will be adjustable between 1 to 5 seconds. This auto changeover will blocked if the incoming breaker had tripped on fault. In case bus coupler trips on aut closing, no further closing shall be permitted till the system is reset. Changeover back to the normal source of supply 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 5 of 2 will be affected manually. 2.2 Manual Mode Manual live changeover facility will be provided for all the sw itchboard. For planned outage of one of the normal inco ming supplies, the respective elected incomer will be tripped automatically after the bus section breaker is closed anually. Also for restoration of normal power supply, the buscoupler will trip after the resp ective incoming breaker is closed. For this purpose, trip selector shall be provided for selecting the breaker to be tripped and momentary paralleli ng shall be done after phase comparison of both the power supplies through check synchronization relay. Thus, depending the selection made, the selected breaker will be tripped once all the three breakers ar closed manually, thus maintaining continu ity of supply for the complete switchboard. timer with time delay on pick up of 0.5. - 5 sec will be pr ovided, for annunciat