English to Russian Tech/Engineering Electronics / Elect Eng can be briefly paralleled

standing transfer / hot transfer

. An operator-initiated closing using the control switch (C.S./CLOSE). This action is supervised by a sync-check relay (25) or the bus undervoltage relay (27/BUS) in series with a 52b contact from the auxiliary source breaker. The sync-check relay allows a closure if the bus is energized and the start-up source voltage is in phase with the bus voltage. The undervoltage relay allows a closure if the bus voltage is below the relay setting and the auxiliary breaker is also open. The diode between the sync-check relay and the undervoltage relay prevents a standing transfer to the start-up* breaker through the sync-check relay, if this start-up breaker closure occurs through the sync-check relay, the auxiliary breaker is tripped through a 52a contact and the start-up breaker control switch. When this type of transfer occurs, it is a hot transfer.