Product Introduction
This series of dual-pump sewage automatic control boxes (also known as one-in-use and one-standby water pump control cabinets) is a core control device specially designed for sewage discharge systems in basements, catch basins, sewage treatment stations and other occasions. The product adopts high-quality electrical components and a reasonable logic control circuit to realize automatic rotation and mutual assistance operation of two sewage pumps, with complete motor protection and user-friendly human-machine interaction functions. Its core design ensures the reliability, safety and intelligence of the drainage system, effectively prevents flooding accidents, and prolongs the service life of the equipment.
I. Core Functional Features:
1. Intelligent dual-pump control logic
One in use and one standby with automatic rotation: The system sets the two pumps as backups for each other. During each startup, the main pump is given priority (timed rotation can be set to avoid long-term idleness of a single pump). When the main pump fails, the standby pump automatically starts running without delay and sends out an alarm indication.
Automatic water level control:
Low water level pump start: When the liquid level reaches the set start-up water level, a water pump is automatically started to drain water.
High water level (overflow level) combined pump: When the water level rises too fast or one pump is insufficient for drainage and the ultra-high water level is reached, the system automatically starts the second water pump, and both pumps run at the same time to accelerate drainage, effectively dealing with emergencies.
Water level pump stop: When the water level drops to the set stop water level, all running water pumps will automatically stop, whether it is single-pump or dual-pump operation.
2. Complete motor protection functions (in line with electrical engineer design specifications)
Short-circuit protection: Equipped with a high-performance circuit breaker, which can instantly cut off the power supply when a short circuit occurs in the circuit, protecting the control system and the pump motor.
Thermal overload protection: Each water pump circuit is equipped with a thermal relay or an intelligent motor protector to realize overload protection. When the water pump motor overheats due to blockage, phase loss, overcurrent and other reasons, the protection device acts to automatically stop the pump and switch to the standby pump, and at the same time send out a fault indicator light signal.
Phase loss protection (optional): Real-time monitoring of power phase loss to prevent the motor from burning due to phase loss operation.
Leakage protection (optional): Leakage protection function can be added according to needs to improve the safety level of personnel and equipment.
3. Flexible operation modes
Through the transfer switch on the door panel, users can easily switch between three working modes:
Manual mode: In this mode, the operator can independently control the start and stop of each pump through the "start" and "stop" buttons, which is convenient for equipment debugging, maintenance and forced operation.
Auto mode: The system automatically executes all control processes (start-stop, rotation, mutual assistance) completely according to the signal of the liquid level sensor, realizing unattended operation.
Stop/maintenance position: Cut off the automatic control circuit, and all pumps cannot be started, ensuring absolute safety of maintenance operations.
1. Intelligent dual-pump control logic
One in use and one standby with automatic rotation: The system sets the two pumps as backups for each other. During each startup, the main pump is given priority (timed rotation can be set to avoid long-term idleness of a single pump). When the main pump fails, the standby pump automatically starts running without delay and sends out an alarm indication.
Automatic water level control:
Low water level pump start: When the liquid level reaches the set start-up water level, a water pump is automatically started to drain water.
High water level (overflow level) combined pump: When the water level rises too fast or one pump is insufficient for drainage and the ultra-high water level is reached, the system automatically starts the second water pump, and both pumps run at the same time to accelerate drainage, effectively dealing with emergencies.
Water level pump stop: When the water level drops to the set stop water level, all running water pumps will automatically stop, whether it is single-pump or dual-pump operation.
2. Complete motor protection functions (in line with electrical engineer design specifications)
Short-circuit protection: Equipped with a high-performance circuit breaker, which can instantly cut off the power supply when a short circuit occurs in the circuit, protecting the control system and the pump motor.
Thermal overload protection: Each water pump circuit is equipped with a thermal relay or an intelligent motor protector to realize overload protection. When the water pump motor overheats due to blockage, phase loss, overcurrent and other reasons, the protection device acts to automatically stop the pump and switch to the standby pump, and at the same time send out a fault indicator light signal.
Phase loss protection (optional): Real-time monitoring of power phase loss to prevent the motor from burning due to phase loss operation.
Leakage protection (optional): Leakage protection function can be added according to needs to improve the safety level of personnel and equipment.
3. Flexible operation modes
Through the transfer switch on the door panel, users can easily switch between three working modes:
Manual mode: In this mode, the operator can independently control the start and stop of each pump through the "start" and "stop" buttons, which is convenient for equipment debugging, maintenance and forced operation.
Auto mode: The system automatically executes all control processes (start-stop, rotation, mutual assistance) completely according to the signal of the liquid level sensor, realizing unattended operation.
Stop/maintenance position: Cut off the automatic control circuit, and all pumps cannot be started, ensuring absolute safety of maintenance operations.
4. Intuitive status indication
High-brightness LED indicators are integrated on the door panel to display the system status in real time, which is clear at a glance:
Power indicator: The control box is powered on.
Running indicator: Indicates which water pump is running.
Stop indicator: Indicates that the water pump is in a stopped state.
Auto/manual mode indicator: Displays the currently selected mode.
Fault alarm indicator: When any pump has faults such as overload or phase loss, the corresponding "fault" red light is on, accompanied by an audible and visual alarm (optional) to remind the staff to handle it in time.
High-brightness LED indicators are integrated on the door panel to display the system status in real time, which is clear at a glance:
Power indicator: The control box is powered on.
Running indicator: Indicates which water pump is running.
Stop indicator: Indicates that the water pump is in a stopped state.
Auto/manual mode indicator: Displays the currently selected mode.
Fault alarm indicator: When any pump has faults such as overload or phase loss, the corresponding "fault" red light is on, accompanied by an audible and visual alarm (optional) to remind the staff to handle it in time.
II. Main Technical Parameters:
| Item | Parameters |
| Rated voltage | AC 380V ±10% / 50Hz (AC 220V customizable) |
| Controlled motor power | Regular: 5.5kW ~ 30kW (can be customized according to requirements) |
| Protection class | IP55 (or higher, effectively dustproof and waterproof) |
| Cabinet material | Cold-rolled steel plate / stainless steel SS304 (optional) |
| Main electrical components | Famous brand circuit breakers, contactors, thermal relays/intelligent protectors, intermediate relays, etc. |
| Liquid level detection method | Float switch / submersible liquid level sensor / electrode type (optional) |
| Control mode | Manual / Automatic |
| Installation method | Wall-mounted / Floor-standing |
III. Application Scenarios:
* Sump pits in building basements and underground garages
* Municipal sewage treatment pumping stations
* Logistics drainage in commercial complexes, hotels and hospitals
* Drainage systems in factory workshops and warehouses
* Drainage in civil air defense projects and subway stations
* Sump pits in building basements and underground garages
* Municipal sewage treatment pumping stations
* Logistics drainage in commercial complexes, hotels and hospitals
* Drainage systems in factory workshops and warehouses
* Drainage in civil air defense projects and subway stations
IV. Selection Notes:
To ensure that you select the most suitable product, please provide the following information:
1. Power, rated current and voltage of the water pump motor.
2. Number of water pumps (this product is standard with 2 units).
3. Type of liquid level sensor (float, submersible, etc.).
4. Requirements for cabinet material and protection level (IP).
5. Whether there are other special functional requirements (such as: remote monitoring interface, RS485 communication, SMS alarm, etc.).
To ensure that you select the most suitable product, please provide the following information:
1. Power, rated current and voltage of the water pump motor.
2. Number of water pumps (this product is standard with 2 units).
3. Type of liquid level sensor (float, submersible, etc.).
4. Requirements for cabinet material and protection level (IP).
5. Whether there are other special functional requirements (such as: remote monitoring interface, RS485 communication, SMS alarm, etc.).
We hope this product introduction meets your requirements. If you need a more detailed technical scheme or circuit diagram, we can further provide them for you.
V. Sample diagrams are for reference only.