Skip to content CQJ7 series motor controller is designed for AC 50Hz or 60Hz circuits, with a rated operational voltage up to 380V, rated control power up to 18.5kW (current up to 38A).
It controls the direct start and stop of water pumps or motors, provides overload and phase-failure protection, and enables automatic liquid level control for civil water towers and reservoirs. Not suitable for liquid level control of low-conductivity liquids (e.g., oil, purified water), flammable/explosive chemical liquids, or high-density sewage.
Standard: IEC 60947-4-1
| Type | Operating and Installation Conditions |
| Altitude | ≤ 2000m |
| Ambient air temperature | -5°C ~ +40°C; 24-hour average temperature ≤ +35°C |
| Atmospheric conditions | The maximum temperature of 40°C, the air relative humidity not exceed 50%,; higher humidity allowed at lower temperatures. Special measures should betaken if condensation occurs on the product occasionally due to temperature variation |
| Pollution degree | 3 |
| Installation category | III |
| Weather | Where there is rain and snow protection and there is no steam. |
| Environment | In a non-explosive hazardous medium, and there is no place in the medium that is sufficient to corrode metals and destroy insulation gases and conductor dust. |
| Shock vibration | Products should be installed and used without severe shake, shock and vibration of the place. |
| Installation position | Tilt and vertical deviation ≤ 5° |
| CQJ7 | – | W | 220V | 3.5~11 |
| Model | Frame Size | Rated control supply voltage | Setting Current Scope | |
| Motor Starter | Blank: without liquid level relay W:with liquid level relay | 220V 380V | 0.72~2.4 | |
| 3.5~11 | ||||
| 10~16 | ||||
| 20~25 | ||||
| 30~38 |
Phase failure protection characteristics of the controller: In case of failure of any phase of the three-phase main circuit passing through the center hole of the motor comprehensive protector in the controller, the motor comprehensive protector operates for a period of ≤5s.
Overload protection characteristics of the controller under balanced three-phase load.
| No. | Setting Current multiple | Operation time | Starting conditions | ||
| 1 | 1.05 | No operation within 2h | Cold state start | ||
| 2 | 1.2 | Operation within 2h | Start after No.1 | ||
| 3 | 1.5 | Tripping class | 30 | ≤12min | Startater applying a 1.0 times setting current for 2h |
| 4 | 7.2 | Tripping class | 30 | 9s<Tp≤30s | Cold state start |
| Type | Conventional heating current(A) | Max.rated power(kW) | Model of matching AC contactor | Model of matching motor protector | Setting current range(A) | Number of turns of protector(turn) | |
| AC-3 | |||||||
| 380V | 220V | ||||||
| CQJ7 0.72A~2.4A | 2.4 | 1.1 | 0.55 | CC7-09 | JD-8/0.5A~5A | 0.72~2.4 | 5 |
| CQJ7-W 0.72A~2.4A | |||||||
| CQJ7 3.5A~11A | 12 | 5.5 | 3 | CC7-12 | JD-8/2A 20A | 3.5~11 | 1 |
| CQJ7-W 3.5A~11A | |||||||
| CQJ7 10A~16A | 16 | 7.5 | 4 | CC7-18 | JD-8/2A~20A | 10~16 | 1 |
| CQJ7-W 10A~16A | |||||||
| CQJ7 20A~25A | 25 | 11 | 5.5 | CC7-25 | JD-8/20A~80A | 20~25 | 1 |
| CQJ7-W 20A~25A | |||||||
| CQJ7 30A~38A | 38 | 18.5 | 9 | CC7-38 | JD-8/20A~80A | 30~38 | 1 |
| CQJ7-W 30A~38A | |||||||
The controller is composed of a CC7 series AC contactor, a JD-8 series motor comprehensive protector, and an YCL8 liquid level relay, all housed in a protective enclosure. It is available in two versions:
Setting of the motor comprehensive protector in the controller is required before it is connected and put into use.
