In modern power systems, variable-frequency series resonant devices, with their highly efficient and energy-saving features, have become indispensable important equipment in the field of high-voltage testing. To ensure operational safety and extend the service life of the equipment, users must strictly adhere to the following precautions.
I. Equipment Installation and Environmental Requirements
Site Selection: The device should be installed in a dry and well-ventilated indoor environment, avoiding direct sunlight and rain erosion. The ground should be flat and solid, with a load-bearing capacity of more than 1.5 times the total weight of the equipment. Special attention should be paid to keeping the area within 1 meter around the equipment free of metal debris accumulation.
2. Power Supply Configuration: An independent three-phase five-wire power supply must be used, with voltage fluctuation controlled within ±10%. It is recommended to configure a dedicated voltage stabilizing power supply and ensure that the grounding resistance is less than 4Ω. The cross-sectional area of the power cord must not be less than 6mm², and the length should be controlled within 30 meters.
II. Operating Procedures
Before starting up, perform a system self-check each time before use. Focus on checking the following:
- Whether all connection parts are tightened
- Whether the surface of insulating parts is clean and dry
- Whether the cooling fan operates normally
- Whether the protective grounding is reliable
2. Parameter Settings: Accurately input the following based on the characteristics of the test sample:
- Rated voltage (with an error of ±1%)
- Resonant frequency range
- Test duration (suggested not to exceed 30 minutes)
- Overcurrent protection threshold (usually set at 1.1 times the rated current)
III. Operation Monitoring
During the test, real-time monitoring must be carried out continuously to observe the following: – Output voltage/current waveforms – System temperature (not exceeding 65℃) – Stability of the resonant point – Surface discharge conditions of the test sample
2. Abnormal Condition Handling: The machine should be immediately shut down in the following situations:
- Severe fluctuations in voltage and current
- Creeping discharge occurs on insulating components
- The control system issues an alarm
- Abnormal noise or odor is detected
IV. Maintenance and Care
Daily maintenance: After the end of each day’s work, the following should be done: – Clean the surface of the equipment – Check the cable connections – Record the operation data – Disconnect the main power supply
2. Regular Maintenance: Quarterly inspections are required to be carried out, including:
- Insulation resistance test (≥100MΩ)
- Dust removal from the heat dissipation system
- Inspection of the tightness of connection components
- Protection function test
V. Safety Protection
Personnel Requirements: Operators must:
- Hold a valid high-voltage operation certificate
- Wear insulating protective gear
- Work in teams of two or more
- Be familiar with emergency response plans
2. Hazardous Area: During the test, the following must be established:
- A 3-meter radius caution zone
- Clear warning signs
- Sound and light alarm devices
- Emergency stop buttons
VI. Handling of Special Operating Conditions
At high altitudes, when the altitude exceeds 1000 meters:
- Reduce the rated power by 15%
- Extend the cooling time
- Strengthen insulation monitoring
2. In a humid environment with a relative humidity greater than 80%:
- Preheat and dehumidify in advance
- Shorten the continuous working time
- Use moisture-proof equipment
By strictly adhering to the above operation procedures, the safe and stable operation of the variable frequency series resonant device can be ensured, providing a reliable guarantee for the testing of power equipment. It is recommended to establish a complete equipment file, detailing each usage and maintenance data, to provide a reference basis for subsequent work.
Post time: Dec-22-2025