NJBK5-5 motor controller is suitable for AC 50Hz/60Hz, rated working voltage 220V, rated control power to 2.2kW (current to 20A) circuit to control single-phase water pump direct start and stop, has overload protection and underload protection (water pump pump protection) function, can achieve civil water tower, water tank and other occasions of liquid level automatic control.
The NJBK5-5 controller is designed for direct start‑stop control of single‑phase water‑pump motors operating at 220 V AC, 50/60 Hz, with power up to 2.2 kW and current up to 20 A. It includes overload, under‑load, and pump‑dry‑run protection and is intended for civil water‑tower or reservoir level‑automatic control.
The manual details installation conditions (altitude ≤2000 m, ambient temperature –5 °C to +40 °C, humidity ≤50 % at +40 °C), wiring diagrams, adjustment procedures, and protection settings. It also lists ordering information and physical dimensions. This manual is written in Chinese.
| Rated control supply voltage | AC220V |
|---|---|
| Voltage fluctuation range | 185%~110% |
| Protection class | IP20 |
| Maximum electrode lead distance | 500 m |
| Operating temperature range | -5 °C to +40 °C |
| Maximum installation altitude | 2000 m |
| Maximum relative humidity at +40 °C | ≤50 % |
| Pollution grade | Level 3 |
| Reset method after fault | Power‑off reset, <1 min |
The controller is rated for an AC supply voltage of 220 V.
When overload occurs, the red fault indicator on the controller stays lit and the device trips at level 10.
The electrode leads can be up to 500 meters long.
The controller resets by power‑off; the reset time is less than one minute.