The series resonant device is suitable for handover and preventive tests of large-capacity, high-voltage capacitive test objects. Standards supported: GB50150-2006, DL/T849.6-2004, DL/T596-1996
The output voltage and current waveforms are good, with distortion less than 0.5%. The required capacitance is small, and the required power supply capacity is 1/Q times the test capacity, while the Q value can reach 20 to 60.
Series resonant functions
1. The output voltage and current waveforms are good, with distortion less than 0.5%.
2. The required capacitance is small, and the required power supply capacity is 1/Q times the test capacity, while the Q value can reach 20 to 60.
3. No overvoltage protection is needed. When the test object breaks down, the system detunes, the resonant high voltage disappears, and the reactor immediately limits the short-circuit current, preventing further damage to the test object.
4. It is easy to move on site. The device is a dry-type combined series resonant device, composed of an excitation transformer and multiple resonant reactors. Each component unit is small in size and light in weight.
5. Comprehensive protection functions, including zero-position protection (system startup is prohibited when the voltage output control knob is not at zero), overvoltage protection, overcurrent protection, flashover protection, etc., ensuring system reliability.
Main applications:
A. AC withstand voltage test for 6kV-500kV high-voltage cross-linked cables
B. Power frequency withstand voltage test for 6kV-500kV transformers
C. AC withstand voltage test for GIS and SF6 switches
D. AC withstand voltage test for generators
E. AC withstand voltage tests for other high-voltage power equipment such as busbars, bushings, and instrument transformers.
Widely used in electric power, metallurgy, petroleum, chemical and other industries, suitable for handover and preventive tests of large-capacity, high-voltage capacitive test objects. Jiuyi premium high-voltage/variable frequency series resonant test complete device
Product features:
1. Automatically find the resonant frequency, automatically boost, step down, and time the withstand voltage. During automatic tuning, the system sweeps from 30Hz to 300Hz and finally locks the resonant frequency accurately.
2. Supports multiple test modes: "automatic tuning + manual voltage regulation", "automatic tuning + automatic voltage regulation", "manual tuning + manual voltage regulation", etc. It is recommended to use the "automatic tuning + manual voltage regulation" mode, which quickly finds the resonance point and controls the test process through manual voltage regulation, ensuring higher safety.
3. The system has a friendly human-machine interface: test parameter settings, test control, and test results are displayed on the same screen, which is intuitive and clear, and has automatic timing and operation prompt functions. Full touch screen operation and display, with test data saving and query functions.
4. Comprehensive protection functions. Overvoltage protection, overcurrent protection, flashover protection, zero-position protection, etc., ensure system reliability.
5. The system uses imported power components, with stable voltage and frequency output, reasonable electromagnetic compatibility design, and comprehensive protection functions.
6. Variable frequency series resonant test complete device, after multiple high-voltage direct-to-ground short-circuit tests, the system remains intact, and the system also has strong overload capacity.
