NDA3-(HHA3-1) Electronic load limiting automatic controller

Summarize

NDA3-1 (HHA3-1) series electronic load limiting automatic controller (hereinafter referred to as controller) is suitable for ac 50Hz, working voltage AC220V control circuit, according to the rated power supply.When the electric load exceeds the specified range value, the controller automatically cuts off the load power supply to realize automatic control.The use of control occasions mainly for industrial and mining, enterprise employee dormitory, construction site migrant workers dormitory, control of employees, workers illegal use of electricity to achieve the purpose of safe use.Compact structure, beautiful appearance, and DZ47 (C45) parallel installation.

Directions for use

1. Correctly connect the input terminal (IN) and output terminal (OUT) according to the product identification (the load current should be less than the protection current value of the product).
2. Indicator state of two-color light emitting diode on the panel: When the indicator lamp emits green light, the load power supply is switched on and in running state;When it's red.The protection function is started and the load power is cut off.
3. The load limiting (current) protection action of the controller has the inverse time limit characteristic;That is, when the load exceeds the protection current value of the product, the longer the protection action time of the product is, and vice versa.

Attention

1. Before switching on the power, please carefully check whether the wiring is correct, whether the load size matches the current protection value of the product, and whether the wiring screw has been tightened, otherwise the product will be damaged..
2. After the product is connected to the power supply, do not contact the live part to avoid electric shock.
3. Because the product has no short circuit protection function, when there is short circuit at the input end or the load end of the product, the load limit protection function cannot be started and the product will be damaged.
4. Since the product is reset automatically, when the offending electrical equipment is connected, the controller should dial down the offending electrical equipment immediately after the protection tripping, otherwise the controller will reset and disconnect frequently, thus damaging the product and the electrical equipment.
5. In order to prevent contact heating under strong current, the screws of the terminal must be tightened when wiring, otherwise the product will be damaged or other accidents will be caused by heating at the terminal caused by excessive contact resistance.

Installation method

Application circuit example

Direct control wiring: The controlled appliances are single-phase power supply, and the power consumption does not exceed the rated capacity of the controller.The direct control method can be adopted, and the wiring method is shown in the figure below.

Ordering Instructions:

The product model, product protection current specification, voltage class and quantity shall be explained. If there is any special requirement, it shall be indicated separately.Cases (100 nDA3-120A AC220V).