Introduction of power frequency AC voltage withsta

2022-08-05
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Introduction to transformer power frequency AC withstand voltage test instrument

frequency conversion series resonance test device is applied to power, metallurgy, petroleum, chemical industry and other industries, and is suitable for the handover test and preventive test of large capacity capacitive test objects, such as generators, power transformers, high-voltage cross-linked cables, etc

the frequency conversion series resonance test device can meet the AC withstand voltage test of 35kV cross-linked cable with a length of 1km. It can meet the AC withstand voltage test of 10kV cross-linked cable with a length of 2km. It can meet the AC withstand voltage test of 10kV power transformer

the series resonance composed of reactor L and tested object capacitance C has a fixed resonance frequency f=1/(2 π √ L · C). When the test frequency is equal to this frequency, the circuit resonates. According to this principle, the power supply provided by the frequency modulation power supply is sent to the excitation transformer, which is transformed into medium voltage plus L and the capacitance C of the tested object. By changing the output frequency of the frequency modulation power supply, the circuit is in the series resonance state, and then adjust the output voltage of the frequency modulation power supply to make the voltage on the test object reach the required voltage value

1. Ambient temperature: -10-45 ℃

2. It is very convenient and fast to use. Working humidity: ≤ 90%

3. Altitude: ≤ 2000m

4. Power input: 220V ± l0% single-phase output 0. As the main waste paper recycling products in China are box corrugated paper and white paperboard - 220V (≤ 10kW)

380v ± l0% three-phase, 50HZ output 0-400v

5. Rated test capacity: 0-210kva (optional)

6 Resonance voltage: 0 - developed countries have invested heavily to start the brain program 60kv

7, frequency adjustment range: 25 - 300hz

8, system measurement accuracy: 0.5

9, frequency adjustment resolution: 0.01hz

10, instability: ≤ 0.05%

11, output waveform: sine wave

12, waveform distortion rate: ≤ 0.5%

13, noise: 60db

14, reactor Q value: 0.05%

11 50

75kva/25kv × 3/1a 30 - 300Hz frequency conversion series resonance test package

frequency modulation power supply - it can change its output frequency and output voltage

excitation transformer - plays the role of coupling signal and voltage transformation, and increases the voltage according to its own change

reactor - connected in series with the tested object to form an LC series resonant circuit

capacitive voltage divider - measure the voltage on the test object and feed it back to the FM power supply as a sampling signal

compensation capacitor - compensation of small capacitance requires comprehensive consideration of the cost of the tensile testing machine and adjustment of the frequency of the test object

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