Automatic Transfer Switch

An Automatic Transfer Switch  is an intelligent, self-operating power switching device controlled by dedicated logic. Its main function is to ensure uninterrupted electrical supply by transferring a connected load (such as lights, motors, computers, and other equipment) between two available power sources.

The Automatic Transfer Switch uses a microprocessor-based controller that continuously monitors key electrical parameters like voltage and frequency of both the primary and alternate sources. If the primary source fails, the Automatic Transfer Switch instantly shifts the load to the alternate source, provided it is available. Typically, the Automatic Transfer Switch prioritizes the primary source (utility power) and switches back to it once stability is restored.

How an Automatic Transfer Switch Works

• Utility Power Failure: When the normal utility power goes out, the Automatic Transfer Switch detects the failure.
  
  
• Transfer to Backup Source: The Automatic Transfer Switch shifts the load to the generator or alternate power source once it is stable and meets voltage and frequency requirements.
  
  
• Mode of Operation: The transfer can be automatic or manual, depending on the facility’s configuration.
  

Restoration of Utility Power: When the main utility power is restored, the Automatic Transfer Switch transfers the load back to the normal source.

Rating (In KVA)	15 KVA	15/25 KVA	25 KVA	25/40 KVA	40 KVA
SIZE (L*B*H) in mm	450*310*135	450*310*135	450*310*135	450*310*135	450*310*135

Rating (In KVA)	40/62.5 KVA	62.5 KVA	62.5/82.5 KVA	82.5 KVA	125 KVA
SIZE (L*B*H) in mm	450*310*135	450*310*135	450*310*135	450*310*135	500*310*135