What are the functions of a dual power automatic transfer switch?
1) To put it simply, one power supply is commonly used and the other is a backup power supply. When the regular power supply suddenly fails or has a power outage, the dual power supply switch automatically switches to the backup power supply (the backup power supply can also be powered by a generator under small loads) so that the equipment can still function. normal operation. The most common ones are used in elevators, firefighting, and surveillance. UPS uninterruptible power supplies used in banks are also used, but their backup is a battery pack.Most of the factories, mines or units with first-class and second-class loads have them.
When there is a power outage for any reason and the power supply cannot be restored within a short period of time, the backup power supply must be activated. step:
2) Cut off the circuit breakers of the mains power supply (including the circuit breakers of the control cabinet in the power distribution room and the mains power supply breaker of the dual power supply switching box), open the double-throw anti-reverse switch to the side of the self-contained power supply, and keep the dual power supply switching box The internal power supply circuit breaker is open.
3) Start the backup power supply (diesel generator set). When the standby unit is operating normally, sequentially close the generator air switch and circuit breakers in the self-supplied power supply control cabinet.
4) Close each backup power circuit breaker in the power switching box one by one to deliver power to each load.
5) During the operation of the backup power supply, the operating personnel on duty are not allowed to leave the generator set, and the voltage, plant frequency, etc. should be adjusted in a timely manner according to changes in the load, and any abnormalities should be handled in a timely manner.
6) When the mains power is restored, the power conversion work should be done in time, the backup power supply should be cut off, and the mains power supply should be restored.