Series Resonance Withstand Voltage Test Device
I. Product Introduction
Series Resonance Withstand Voltage Test Device is the abbreviation for the series resonance AC withstand voltage test device. The instrument applies the principle of series and parallel resonance. By adjusting the output frequency of the frequency conversion controller, the inductance L of the reactor in the circuit and the capacitance C of the test object resonate, and the resonance voltage is the voltage applied to the test object. The power supply is provided by the frequency modulation controller. After the test voltage is initially boosted by the excitation transformer, the high voltage is applied to the reactor L and the test object CX. By changing the output frequency of the frequency modulation controller, the circuit is in a series resonance state; the resonance frequency of the circuit depends on the capacitance CX of the test object and the inductance L of the reactor. Adjust the output voltage of the frequency modulation controller so that the high voltage on the test object reaches the required voltage value.
Series Resonance Withstand Voltage Test Device is designed for the characteristics of GIS test with high voltage and small test current. The device has a high degree of automation, small size, and light weight; the weight of each unit in the complete set does not exceed 40kg, suitable for on-site handling; the reactor adopts dry-type epoxy casting, reliable operation, easy handling, no need for hoisting during on-site testing, and can be manually installed for testing.
II. Product Features
1. Suitable for AC withstand voltage tests of various large power transformers, power cables, steam and hydro generators, and other capacitive equipment, which must be strictly conducted periodically according to test regulations;
2. Large screen displays test data and test status, with real-time operation step prompts;
3. Flexible setting of test voltage, frequency modulation range, and pressurization time;
4. Test results can calculate the capacitance of the test object;
5. Has a computer communication interface for convenient communication and test data management;
6. Small size, light weight, and easy operation;
7. High resolution, frequency resolution of 0.001Hz;
8. High safety and reliability, the system has overcurrent, overvoltage, and discharge protection functions, effectively protecting personal and equipment safety, and test results can be printed.
III. Complete Set Composition
The complete set consists of a frequency conversion voltage regulating power supply, excitation transformer, reactor, voltage divider, and compensation capacitor.
IV. Technical Parameters
Ambient temperature: -10～45℃
Ambient humidity: ≤90%
Altitude: ≤2000M
Power input: 220V±10% single-phase 50Hz output 0～220V (≤10KW)
380V±10% three-phase 50Hz output 0～400V
Rated test capacity: 0～8000KVA (optional)
Resonant voltage: 0～1000KV (optional)
Frequency adjustment range: 0.1～300Hz
System measurement accuracy: 0.5 level
Frequency adjustment resolution: 0.01Hz
Instability: ≤0.05%
Output waveform: sine wave
Waveform distortion rate: ≤0.5%
Noise: ≤60dB
Reactor Q value: 30～200 (optional)
