Automatic Transfer Switch for Emergency Power Supply System

Automatic Transfer Switch (ATS) is used for emergency power supply system to switch between two power supply, in order to ensure continuous and reliable electrical power to critical loads. It is primarily used in critical installations, for instance, fire protection system, telecommunication, coal mine and shipping, chemical industry and metallurgy, industrial plants, medical and health care, bank and securities exchange, airport, underground express way, military establishment and similar loads that requires non-interrupted and reliable power supply.

Generator to generator
For facilities with a prime power system using multiple on-site generators. If the primary generator fails, the transfer switch sends a start signal to the second generator and then transfers the load.

Utility to generator
For facilities with a standby power system and a single utility feed. The transfer switch senses when utility power has been lost, sends a start signal to the standby generator and transfers the load.

Three-source system
For facilities with a standby power system and two utility feeds. The utility transfer switch controls the feeds from the two utilities based on a pre-established priority. If both utility feeds fail, the generator transfer switch sends a start signal to the standby generator and transfers the load.

Utility to utility
For use in facilities with redundant utility feeds but no standby generator. If one utility feed fails, the transfer switch automatically connects the load to the second utility feed.

Types
  • Contactor Based Automatic Transfer Switches >>
  • Breaker Based Automatic Transfer Switches >>
  • Bypass Isolation Transfer Switches
Bypass Isolation Transfer Switches
The bypass isolation switch is designed for applications where maintenance, inspection and testing must be performed while maintaining continuos power to the load. This is typically required in critical life support systems and standby power situations calling for safe syustem maintenance with no power disruptions.
Brands and Series: Cummins Power,
GTEC 40-2000 amp series
OTEC 40-1000 amp series
OTPC 40-4000 amp series
CHPC closed-transition 125-800 amp series
OHPC open-transition 125-800 amp series
BTPC 150-4000 amp series Bypass-isolation

and many brands: Perkin Elmer, Eaton

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