Electrical Leakage in High-Pressure Cleaning Machines
A leak in a high-pressure cleaning machine poses a direct threat to personal safety and can also damage the equipment, leading to secondary accidents. It is necessary to immediately shut down the machine and follow the procedure of “power outage inspection-precise location-complete repair” to prevent the fault from escalating.
There are three primary reasons for electrical leakage: first, electrical components deteriorate over time, such as power cords, motor windings, and insulation layers, which can wear out or crack and lead to short circuits and electrical leakage, especially when power cords made of rubber are subjected to prolonged bending and crushing, making the internal copper wires highly susceptible to exposure; second, sealing structures fail, causing the waterproof sealing gaskets of high-pressure pumps, motors, and other components to degrade and break down, allowing water to seep into the electrical chamber during cleaning and causing the lines to become damp and short-circuit; third, improper operation, such as using equipment outdoors during thunderstorms, improper grounding, or plugging and unplugging power cords with wet hands, all increase the likelihood of electrical leakage.
The disposal process must strictly adhere to the principle of “shutting off the power first, then performing operations”: immediately switch off the main power switch. Use an electret tester to confirm that there is no electricity present. Then, use a dry cloth to wipe away any water stains on the equipment’s surface. This prevents accidental contact with live parts during the inspection process. If there is suspicion of electrical leakage in the power cord, replace it with a new cord of the same specifications. Do not use adhesive tape to simply wrap it; if the motor windings are damp, disassemble the electrical box, use a hair dryer to dry the internal wiring at low temperature, and replace the damaged insulation layer.
After the repair, a safety test must be conducted: Before turning off the power, ensure that the device is properly grounded, and the grounding resistance should be less than 4Ω. After startup, test the button with a leakage protection device to confirm that the leakage protection function is functioning correctly. Observe for any unusual sounds or odors during a short period of operation. During routine maintenance, regularly inspect the condition of the power cords and sealing gaskets, clean the electrical chamber of dust every month, and prevent the accumulation of debris from affecting heat dissipation.
If the electrical leakage problem is complex, such as internal wiring damage or motor malfunction, it is recommended to contact a professional repair technician. Do not attempt to disassemble the high-pressure pump or other core components yourself, as this could damage the equipment’s pressure balance system. Only by thoroughly addressing the electrical leakage hazards can the safe use of the high-pressure cleaning machine be ensured, thereby preventing electrical shock incidents.