Due to the special nature of its manufacturing materials, stainless steel submersible pumps have the characteristics of corrosion resistance, high temperature resistance, environmental protection, large flow rate, and durability. In order to ensure their safe use, today we will introduce the precautions when using stainless steel submersible pumps:
1. Before using a stainless steel submersible pump, check whether the cables are damaged. When handling and installing the pump, cut off the iron parts to pull or damage the cables to avoid accidents caused by cable breakage and water leakage. If the cable is severely broken, replace it immediately and use a megohmmeter to check whether the insulation resistance of the electric pump is normal (the insulation resistance should not be less than 1 megohm).
2. Identify the grounding wire (usually yellow green) and connect it according to the prescribed procedure.
3. Choose appropriate stainless steel submersible pump protectors (such as leakage protectors, air switches, phase failure overcurrent protectors, etc.), and do not connect them directly with knife switches.
4. Connect the power cord according to the standard, test the power supply, check if the stainless steel submersible pump is running normally, and determine if the steering is correct. If the steering is incorrect, switch any two of the three power cords (note that the running time should not exceed half a minute).
The installed power frequency and frequency converter must not be started simultaneously, as this can cause damage to the frequency converter. Due to the high voltage and current of the three-phase AC power supply of the power frequency, it will form a short circuit with the output voltage of the frequency converter. That is to say, you can use one device (two AC contactors, one thermal relay) or a simple method to manually switch using two anti three-phase knife switches.
