Overview：

Frequency conversion series resonance test device is designed and manufactured for alternating-current withstand voltage test of Possessing a wider application scope, it is the ideal withstand voltage equipment for prefecture-level, municipal-level and county-level high-voltage test departements as well as power installation and repair & testing engineering units.

(I) Technical index：

1. Rated voltage:

2. Quality factor under full load in test of fire power generator: Q>10 (relating to load)

3. Quality factor under full load in cable test: Q>30 (relating to load)

4. Quality factor under full load in test of main transformer: Q>30 (relating to load)

5. GIS, the quality factor under full load in switch test and other tests: Q>50 (relating to load)

6. Input power supply: single phase of 380V

7. Frequency adjustment range: 20Hz～300Hz

8. Accuracy of system measurement: 1.5％

9. The unit possesses protective functions, such as over voltage, over current and zero start.

(II) Description for main configuration and technical data of equipment:

1. One set of variable-frequency power supply:

Rated power: 10kVA;

Input voltage: single phrase of 220V or three phase of 380V±10% and 45～65Hz

Output voltage: 0～400V adjustable

Output voltage frequency: 30～300Hz

0.1Hz adjustable stepping

Instability degree of frequency ≤0.02%

Output current: 0～25A

2. High-voltage resonane reactor (4sets in all): 27kV/1A

Rated working voltage: 27kV

Rated working current: 1A

Rated inductance value: 120H

Continuous working time: 60min

Temperature rise should be less than 60℃.

Working frequency: 30~300Hz

3. One set of exciting transformer:

Rated capacity: 10kVA

Input voltage: 400V

Output voltage: 1.2kV/3kV/5kV

4. One set of capacitive divider: 120kV, pure capacitance

Its own capacitance: 1000pF

Working frequency: 30～300Hz

Uncertainty: 1.5%

Rated voltage: 120kV/1000pF

Advantages：

1.The resonant power supply is filtering circuit of resonant mode, which can improve the waveform distortion of output voltage, obtain good sinusoidal waveform and effectively prevent the wrong breakdown of harmonics peak value to test object.

2.The resonant power supply is filtering circuit of resonant mode, which can improve the waveform distortion of output voltage, obtain good sinusoidal waveform and effectively prevent the wrong breakdown of harmonics peak value to test object.

3. the series resonance can effectively find insulation weakness, meanwhile, there is not any worry for large short-circuit current to burn fault point.