NJBK5

Relay Protection Relay NJBK5 Motor Controller 1. General NJBK5 series motor controller (hereinafter referred to as controller) is mainly used in circuits with a frequency of AC 50Hz (or 60Hz), a rated operational voltage of up to 380V and a rated control power of up to 11kW (current up to 22A) to control the direct start and stop of water pumps or motors, provide motors with overload and phase failure protection, and realize automatic liquid level control for civil water towers and reservoirs. This product is not applicable to the liquid level control of low-conductivity liquids, such as oil, purified water, inflammable and explosive chemical liquids and highdensity sewage. Standards: IEC 60947-4-1. 2. Type designation N JBK 5 - □ □ / □ □ Rated operational current Rated control supply voltage Function code Blank: with liquid level relay D: without liquid level relay 10: frame size code Design sequence No. Motor controller Company code 3. Operation conditions 3.1 Altitude: the altitude of the mounting location should not exceed 2000m; 3.2 Ambient tempeature: -5℃~+40℃, and the average temperature in 24h should not exceed +35℃； 3.3 Atmospheric conditions: The relative air humidity at the mounting location should not exceed 50% at the maximum temperature of +40℃. The relative humidity may be higher at lower temperatures. Special measures should be taken if condensation occurs on the product occasionally due to temperature variation; 3.4 Pollution degree: 3; 3.5 Mounting category...