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Automatic Transfer Switch (ATS)
They are designed to switch the source of mains GRID supply in milliseconds to the installed Emergency Power Systems to ensure Power Continuity for site needs.
Hence the ATS is the switch between the utility mains GRID supply and the installed Standby Diesel Generator emergency power supply.
The Automatic Transfer Switch consists of two contactors with their associated control sensors. One contactor will supply the utility mains source to the site distribution board; The other contactor will supply the standby diesel generator supply to the distribution board. When there is a utility mains failure, initially the mains contactor will de-energize and the standby diesel generator will receive a start command.
When the standby diesel generator control sensors have determined that the generator supply is at the correct frequency and voltage a signal will be sent to the standby diesel generator contactor to energize it and fed the generator supply to the site distribution board.
When the utility mains supply is re-established a timer will start to ensure that the supply is stable and after a preset time the utility mains contactor will energize and the standby generator contactor de-energize. The standby diesel will continue to run until it has cooled down.
For timing purposes, the duration of supply loss between the failure of the utility mains supply and the provision of a supply from the standby diesel generator can be as short as 30 seconds, providing that the generator starts first time. Returning to the utility mains supply the changeover time can be measured in mille-seconds.
And then life and power goes on as before.
Ghad Al Taqat supply and service different types and Amp capacities as below:
- Circuit breakers contactors type
- Switches contactors type
- Normal and bypass ATS