HUSD18 series duplicate power supply automatic transfer switch

Function:

The controller tests the voltage of two lines of power supply. When the voltage is higher than 110% of rated value, it is regarded as over-voltage; when the voltage is lower than 85% of rated value,it is regarded as under-voltage. The microcomputer controlled circuit will conduct logic judgement of testing result, and the dealing result will send ON & OFF directive to the electrical operation mechanism by delay (adjustable) circuit drive. And the above-mentioned testing result will be displayed on LCD screen of automatic controller.Automatic controller can be set one of the following three functions according to different use situations and control requirements:1. Automatic changing-over and resetting(R)It is applied in the situation between the two electrical networks. The automatic controller will conduct automatic transfer to the two circuit power supplies (that is, normal power supply and reserve power supply). Under normal condition, normal power supply will work. When it appears fault or abnormal situation (e.g. any phase voltage appears over-voltage, under-voltage, out-of-voltage, or out-of-phase), the controller will alarm.

2. Automatic changing-over and no resetting (S)It is applied in the situation between the two electrical networks. The automatic controller will conduct automatic transfer to the two circuit power supplies (that is, normal power supply and reserve power supply). When the normal power supply appears abnormal situation (e.g. any phase voltage appears over-voltage, under-voltage or out-of-phase), the continueroller will make the device work to transfer the circuit to reserve power supply after setting delay. However, when the normal power supply recovers, the device will not reset automatically.3. Between the electrical network and the generator (F)It is applied in the situation between the electrical network and the generator system. When the voltage of electrical network is lower than 85% of rated voltage, the device will send out generating directive after setting delay (output through a group of  NO & NC contacts). When the generating voltage reaches 85% of rated voltage, the device will break off the load circuit of electrical network, and then connect to generating powersupply. When the electrical network recovers (the voltage reaches 85% of rated voltage or more), after logic judgement of the controller, the device automatically will break off the load circuit from the generating power supply and then transfer to electrical network.

HUSD18 series duplicate power supply automatic transfer switch