Drain Pump with Oil-Water Sensor

Contact: CIXIFM Winny

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995

Drain Pump with Oil-Water Sensor and Thermal Switch (Model 200WQ250-11-15 as an Example)

I. Core Parameters and Performance

Basic Parameters

Model: 200WQ250-11-15

Power Supply: 380/400 V 50Hz Three-Phase

Maximum Flow: 490 m³/h

Maximum Head: 21 meters of water column

Maximum Power Consumption: 15,000 W (15 kW)

Rated Current: 26 A

Protection Rating: IP98 (Completely dustproof and waterproof, suitable for harsh environments)

Insulation Class: F (High-temperature resistance up to 155°C, ensuring motor life)

Structure and Materials

Type: Vertical, single-stage centrifugal submersible pump

Casing Material: Cast iron (corrosion-resistant and pressure-resistant)

Impeller Material: Cast iron (Optimized flow path design for improved flow capacity)

Pump Outlet Diameter: 200 mm (standard flange connection, wide compatibility)

Environmental Adaptability

Liquid Temperature Range: 0°C to 40°C (suitable for general sewage applications)

Maximum Installation Depth: 20 meters (flexible submersible depth, suitable for deep wells or tanks)

Maximum Operating Pressure: 6 bar (stable operation under high-pressure conditions)

II. Safety Protection Devices

Oil-Water Sensor

Function: Real-time monitoring of moisture within the pump body's sealing oil chamber. Upon detecting a leak, an alarm is triggered and 

the pump is shut down immediately, preventing water intrusion and burnout of the motor.

Advantage: Avoids sudden failures caused by traditional mechanical seal failure, extending equipment life.

Thermal Switch (Thermal Protector)

Function: Built into the motor stator winding, automatically cuts power when the temperature exceeds a set value (e.g., 120°C), preventing

 motor overheating and damage.

Advantage: Replaces traditional thermal relays with faster response and more precise protection.

Full Protection Device (Optional)

Function: Integrated leakage, overload, short-circuit, and phase loss protection, supporting remote monitoring and fault logging.

Application Scenario: Safety-critical applications such as municipal engineering and industrial wastewater treatment.

III. Control Cabinet Support Solution

15KW Liquid Level Direct Start/Stop, One-Control-Three Control Cabinet

Function: Automatically controls the start and stop of three pumps via a float switch or ultrasonic level gauge, supporting alternating 

operation of the primary and backup pumps.

Protection Features:

Leakage protection (operating current ≤ 30mA)

Overload protection (inverse time characteristic)

Phase loss protection (power cutoff within 0.5 seconds)

Overtemperature protection (interlocked with a thermal switch)

15KW Liquid Level Direct Start/Stop, One-Control-Four Control Cabinet

Extended Function: Adds a backup pump to the "one-control-three" system, supporting alternating operation of four pumps. Suitable for

 large sewage treatment plants.

Control Logic Example

High Water Level Start: When the liquid level reaches the upper limit, the primary pump starts; if the liquid level continues to rise, the

 backup pumps are activated in sequence.

Low Water Level Shutdown: When the liquid level drops to the lower limit, all pumps stop.

Failover: If the primary pump fails, the backup pump automatically takes over, ensuring continuous drainage.

IV. Selection Recommendations

Key Points

Matching flow and head: Select a model slightly higher than the required value based on actual operating conditions (e.g., the

 200WQ250-11-15 is suitable for flow rates ≤ 490 m³/h and heads ≤ 21 meters).

Motor Type:

Oil-immersed motor: Excellent heat dissipation, suitable for long-term operation (e.g., model 200W/3300-12-15).

Dry-type motor: Easy maintenance, suitable for frequent start-stop conditions (e.g., model 200WQ250-11-15).

Contact: CIXIFM Winny

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995

Service Support: Provides site surveys, pump station design, installation and commissioning, and after-sales maintenance.

V. Application Scenarios

Municipal Wastewater: Municipal sewage treatment plants, rainwater pumping stations

Industrial Wastewater: Chemical, papermaking, printing and dyeing, and food processing industries

Building Drainage: Basement, subway, and tunnel drainage

Agricultural Irrigation: Farmland drainage, aquaculture water circulation

Summary: This drainage pump features a high protection level, multiple safety features, and a flexible control scheme. It is suitable 

for wastewater discharge applications with stringent reliability requirements. When selecting a pump, a comprehensive assessment 

of flow rate, head, media characteristics, and budget is required. We recommend contacting the supplier for a customized solution.