Controlador de Motor EXQJ7
Start, Stop and Level-Protect Your Pumps — Up to 18.5kW, IP55
The EXQJ7 is a motor controller built for water pumps: it starts and stops a pump or motor on command while protecting it against overload and phase loss, and the EXQJ7-W version adds automatic liquid level control for domestic water towers, reservoirs and sumps. Rated for motors up to 18.5kW (38A at 380V) in an IP55 enclosure, it is a single-box alternative to wiring a contactor, relay and float control together.
Modelo
EXQJ7 Series — Motor / Water Pump ControllerEXQJ7 · EXQJ7-W (with liquid level relay)
IP55 · AC220V/380V · up to 18.5kW · overload & phase-loss protection
Detalhes do Produto
- Direct start/stop controller for pumps and motors up to 18.5kW (38A at 380V) in an IP55 enclosure.
- EXQJ7-W adds automatic liquid level control with electrode leads up to 200m for water towers and sumps.
- Overload and phase-loss protection (phase-loss trip ≤5s) via the JD-8 motor protector.
- Indicator-light status feedback; connector-based wiring for quick component replacement; AC220/380V.
Informações do Produto
Três Características Principais
- Protection Class: IP 55
- Highly reliable
- Convenient for maintenance and inspection
Diagrama de Análise Estrutural do Produto
Scope of Application
The EXQJ7 series motor controller(hereinafter referred to as the controller) is mainly used in circuits with AC frequency of 50Hz(or 60Hz), rated operating voltage of 380V, and rated control power up to 18.5kW(corresponding current of 38A).It is designed to directly control the start and stop of water pumps or motors, provide overload and phase failure protection for motors, and realize automatic liquid level control for domestic water towers and reservoirs.
This product is not suitable for liquid level control of low-conductivity liquids, such as petroleum, puriƍed water. Əammable and explosive chemical liguids, and high-density sewage.
The version equipped with a liquid level relay is used to control the start and stop as well as automatic pumping and draining of water pumps, while providing overload and phase failure protection. The version without a liquid level relay is designed to control the start and stop of motors, with overload and phase loss protection functions. The motor comprehensive protector of the controller shall be conƍgured before beingconnected and put into operation.
Normal Operating Conditions and Installation Conditions
- Altitude: The altitude of the installation location shall not exceed 2000 m
- Ambient Temperature: -5℃ ~ +40℃; the average temperature within 24 hours shall not exceed +35℃.
- Atmospheric Conditions: The maximum relative air humidity at the installation location shall not exceed 50%.
- At a temperature of 40°C, the lower the temperature, the higher the relative humidity may be.If condensation occasionally occurs on the product due to temperature variations, special measures shall be taken
- Pollution Degree: 3
- Installation Category: II
- It shall be installed in locations free from obvious vibration or impact.
- It shall be used in non-explosive media free from excessive gases or dust that may cause metal corrosion or insulation failure.
- It shall be installed in locations with rain and snow protection; the inclination relative to the vertical plane shall not exceed 5°
Main Parameters and Technical Performance
| Model and
Especificação |
Rated Frame Current le(A) |
Rated Control Power of Frame Pe(kW) | Model of
Assembled Contator AC |
Model of the
Matched Motor |
Setting Current
Range A |
Protector Turns | |
| AC-3 | |||||||
| 380V | 220V | ||||||
| EXQJ70.72A~2.4A | 2.4 | 1.1 | 0.55 | EXC7-09 | JD-8/0.5A~5A | 0.72~2.4 | 5 |
| EXQJ7-W 0.72A~2.4 | |||||||
| EXQJ73.5A~11A | 12 | 5.5 | 3 | EXC7-12 | JD-8/2A~20A | 3.5~11 | 1 |
| EXQJ7-W 3.5A~11A | |||||||
| EXQJ710A~16A | 16 | 7.5 | 4 | EXC7-18 | JD-8/2A~20A | 10~16 | 1 |
| EXQJ7-W 10A~16A | |||||||
| EXQJ720A~25A | 25 | 11 | 5.5 | EXC7-25 | JD-8/20A~80A | 20~25 | 1 |
| EXQJ7-W 20A~25A | |||||||
| EXQJ7-W 30A~38A | 38 | 18.5 | 9 | EXC7-38 | JD-8/20A~80A | 30~38 | 1 |
| EXQJ7-W 30A~38A | |||||||
- Rated Control Power SupplyVoltage Ue: AC220V,AC380V
- Protection Class:IP55
- Protection Characteristics of the Controller:
- Phase Loss Protection Characteristic: When any phase of the three-phase main circuit passing through the motor comprehensive protector is lost, the motor comprehensive protector shall operate, with an operating time ≤ 5s
- Overload Protection Characteristic of the Controller Under Three-Phase Balanced Load
| Serial Number | Setting the Current Multiplier | Operating Time | Initial Conditions | ||
| 1 | 1.05 | No operation within 2 hours | Cold Start | ||
| 2 | 1.2 | Operation within 2 hours | Perform after Sequence 1 | ||
| 3 | 1.5 | Trip Class | 30 | ≤12min | Start after applying 1.0 times the set current for 2 hours |
| 4 | 7.2 | Trip Class | 30 | 9s≤Tp≤30s | Cold Start |
- Maximum distance of the liquid level control electrode’s down -lead: 200 m
- Mounting Method: Device Mounting
Diagrama de Fiação
Shape and Installation Dimensions
Como Apoiamo Seu Negócio
OEM / ODM
Custom panels, electrode sets and branding for water equipment OEMs building automatic pumping systems.
Custom panels · Electrode sets · Test reports
Atacado
Factory-direct pricing for pump distributors and irrigation suppliers stocking automatic level controllers.
Preço de fábrica · MOQ flexível · Envio global
Suporte ao distribuidor
Sizing tables, wiring diagrams and priority production for channel partners in the pump and water market.
Wiring support · Sizing tables · Priority lead times
Ready to Stock the EXQJ7 Series?
OEM/ODM, wholesale pricing and distributor support — one enquiry gets you a factory-direct quotation for EXQJ7 motor and water pump controllers, standard or with automatic liquid level control.
Perguntas Frequentes
What is the difference between EXQJ7 and EXQJ7-W?
EXQJ7 starts and stops a motor or pump with overload and phase-loss protection. EXQJ7-W additionally contains a liquid level relay: by connecting level electrodes in the tank it automatically switches the pump on and off to maintain the liquid level — filling a water tower or draining a sump without human action. Choose -W when automatic level control is required.
Which liquids can the EXQJ7-W control?
It is designed for water and similar conductive liquids — domestic water towers, reservoirs, wells and sumps. It is not suitable for liquids with very low conductivity (petroleum, purified water), flammable or explosive chemicals, or high-density sewage, because the electrode sensing principle requires an electrically conductive medium.
How does the liquid level sensing work?
Three (or more) electrodes are lowered into the tank at the desired levels. Water bridging the electrodes completes a low-current circuit to the controller; the EXQJ7-W interprets the level and switches the pump accordingly. The electrode down-lead may be up to 200m, and the sensitivity is adjustable to match water conductivity.
What protection does the EXQJ7 provide for the pump motor?
A motor comprehensive protector provides overload protection along a calibrated curve (no trip at 1.05× setting current, trip within 2h at 1.2×, Class 30 thermal curve above) and phase-loss protection that disconnects within 5 seconds when any phase is lost. The protector must be configured to the motor current before commissioning.
Can the EXQJ7 be used with a PLC instead of level electrodes?
Yes. The basic EXQJ7 is a motor controller for manual or external control: start/stop can be driven by XB2-E push buttons or by PLC/relay contacts, while overload and phase-loss protection remain active. The -W version adds the internal level logic for stand-alone automatic operation.
