product description

The automatic transfer switch electrical appliance is a power distribution electrical appliance composed of a transfer switch electrical appliance and its control electrical appliance. It is mainly used to monitor the power supply circuit. When the common power supply fails, the power supply is automatically switched from the common power supply to the standby power supply, thereby completing the switching of the dual power supply system.

At present, automatic transfer switch electrical appliances are mainly used in some important places of electricity use, such as: primary, secondary important loads, fire load, emergency lighting in buildings; automatic power switching in infrastructure.

NMSGA (B) series automatic transfer switchgear is widely used in AC380V50Hz and above, rated current is 32A-800A with load power switching. It can also be used as an infrequently connected, disconnected circuit and line isolated product.

The NMSGA (B) series of automatic transfer switch appliances have the ability to switch on and carry current; the ability to switch power at full load and extremely strong anti-interference ability. With three stable working positions, a variety of flexible control functions and energy-saving, noise-free, reliable operation and other characteristics.

Model and meaning

Back control function brief

NMSGA (B) automatic transfer switch is divided into three control types

A terminal type

Mainly for the city's electricity market, it is suitable for two-way mains and backup systems. When the main power supply circuit is out of phase or loses pressure, the switch will automatically enter the standby power supply circuit: When the main power supply circuit resumes power supply, the switch will automatically load the load into the main power supply circuit.

B basic type

Mainly for the city's electricity market, it is suitable for two-way mains and backup systems. When the main power supply circuit loses pressure or there is an overvoltage or equal fault, the switch will automatically enter the standby power supply loop (adjustable delay). When the main power supply loop returns to normal, the switch will automatically load the load into the main power supply loop (adjustable delay) . The controller can set the self-recovery and self-recovery functions.

C generator type

Mainly for the mains-generator type, it is suitable for the main power supply loop of the mains and the standby power supply loop system for the generator. When the main power supply circuit has power failure, over-voltage and under-voltage failure, the switch controller sends a start generator signal. When the generator voltage is normal, the switch load is automatically input into the generator power supply circuit. When the main power supply loop returns to normal, the switch puts the load into the main power supply circuit and disconnects the generator start signal.

Outline mounting size