Automatic transfer switches are used to automatically change over from the main electrical supply to stand-by generators or generate on failure of the main supply.

When the main supply is restored, the system automatically changes back and stops the generator. The stand-by generator will eventually be shut down after a short cooling down period.

These panels are provided with mechanically or electrically interlocked pole contactors or MCCB.

And are:


  • Operated both automatically and manually.
  • Employ a Breaker closing time delay instilled in order to avoid current and voltage surges.
  • Employ automated sensing for:

  1. Under voltage
  2. Phase failure
  3. Phase sequence
  • Instilled with Generator start/stop commands
  • And Indicate:

  1. Incoming voltage
  2. Engine running/faulty conditions
  3. MCCB On/Trip conditions
  • Engine tests run position for routine test of engines.
  • Status signals for remote indications.

    Automatic Transfers Switches (ATS)
    APCL Automatic Transfers Switches (ATS)