7 Essential Operational Precautions for Submersible Pumps

Submersible pumps require strict adherence to safety and operational protocols to prevent equipment damage and hazards. Based on industry standards, 

here are seven critical precautions derived directly from field experience:

1. Absence of Leakage Protection Switch Creates Severe Safety Hazards  

Operating submersible pumps without an installed leakage circuit breaker poses significant electrical risks. This omission compromises user safety and violates fundamental 

electrical safety requirements for submersible equipment.  

2. Abnormal Voltage Operation Reduces Service Life  

Running submersible pumps during voltage fluctuations directly impacts motor longevity. Voltage deviations outside acceptable ranges accelerate component 

degradation and shorten operational lifespan.  

3. Pump Body Exposure Above Water Causes Overheating Damage  

When the pump body remains partially or fully exposed above the water surface during operation, inadequate cooling occurs. This sustained high-temperature condition 

inevitably leads to equipment failure and premature damage.  

4. Cable Installation and Insulation Resistance Requirements  

During installation:  

- Power cables must be suspended overhead  

- Power cables should not exceed recommended lengths  

- Never lift or lower the pump by pulling its power cable to prevent conductor breakage  

Additionally, motor insulation resistance must measure no less than 0.5 megohms before operation.  

5. Complex Usage Environments Demand Special Attention  

Submersible pumps deployed in challenging conditions require heightened operational awareness. Environmental complexity introduces variables that demand careful 

monitoring and adaptive handling procedures.  

6. Strict Prohibition Against Dry Running Operations  

Submersible pumps must never operate without water entering the pump chamber. Dry running without medium immersion is a well-documented cause of motor burnout 

across the industry. All testing and commissioning must occur only when the pump is completely filled with water and fully submerged in the operating medium.  

7. Prevention of Excessive Start-Stop Cycles  

While intermittent operation is unavoidable in applications like building water supply and deep well extraction, frequent starting and stopping must be minimized. 

Manufacturers specify maximum allowable start-stop cycles; exceeding these limits creates excessive motor stress that causes mechanical damage. Unnecessary continuous operation should also be avoided to conserve energy.