Dual power automatic transfer switch is mainly composed of two parts: the switch body + dual power controllers, dual power controller which is mainly used to monitor the status of the power of two-way working, when the monitored power failure (such as any one phase, due to pressure, voltage or frequency deviations), the dual power controller sends movement commands instruct the switch body with a load automatically converted from the failed power supply to the normal power supply.

Dual power automatic transfer switch with circuit breakers and load switches are different, in addition to switching equipment must also include a controller, if there is no dual power controller will be unable to action. The choice of dual power controllers should consider the reliability and practicality.

Reliability Dual Power Controller
In the introduction of microprocessors and integrated chip technology to bring feature-rich, but also inevitably bring about negative impact on the fragile controller. Dual power supply controller detects take power directly from the main and backup power supply side, the need to withstand voltage fluctuations in the main circuit, surge impact, harmonic interference and electromagnetic interference. Therefore, to ensure the reliability of the controller, a reference to the relevant standard as the best measure. For example: to prevent electromagnetic interference standards IEC1000-4-3; transient surge prevention standards IEC1000-4-4 like.

Practicality of dual power controllers
Dual power supply via the controller to automatically monitor the line and complete the automatic conversion, so the controllers are required to complete common / standby power supply fault monitoring and conversion-driven enforcement action process. Features dual power controller uses microprocessor technology features the concentrated two items to one, which requires the controller detection module with high precision, logic module has a wide range of parameter settings to accommodate different loads requirements.Of course, the controller must also have the necessary status indication. With the development of dual power supplies and generators increasingly close ties and network centralized monitoring, dual power generators have to start function. In engineering design, whether it is mains power failure, dual power distribution to line faults or other electrical component failure of the line, can be perceived by the dual power outage load, sending the signal to start the supply of emergency power generators. Meanwhile state provides contact or communication interface on the controller can be used to monitor the network to monitor the working status of dual power, thereby increasing the efficiency and reliability.

To sum up, in ensuring the safety and reliability of the controller premise, with the more versatile the better. Dual power supply and controller must be tested during Mfg, use inspection before installation. Avoid dual power supply and controller is not available to purchase separately a combination of parameters that may occur resulting in dual-supply mismatch can not be required conversion.