Variable frequency series resonant withstand voltage test device

NegotiableUpdate on 05/20

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The principle of the technical parameters of the variable frequency series resonance withstand voltage test device is to use an excitation transformer to excite the series resonance circuit. By adjusting the output frequency of the variable frequency controller, the reactor inductance L and the sample capacitance C in the circuit undergo series resonance, and the resonance voltage is the voltage applied to the sample. The frequency conversion resonance test device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering, and is suitable for the handover and preventive testing of high-capacity, high-voltage capacitive specimens.

Product Details

Variable frequency series resonant withstand voltage test deviceScope of application

Meet the AC withstand voltage test for a 1km long 35kV (300mm2) cross-linked cable.

Meet the AC withstand voltage test of 3km long 10kV (300mm2) cross-linked cable.

Meet the AC withstand voltage test of 3km long 6kV (300mm2) cross-linked cable.

Meet the test voltage of 6kV high-voltage motor: 10kV:

Meet the AC withstand voltage test of switch busbars and transformers for 35kV substations.

Main technical parameters of the system

1. Power supply voltage: AC 220V 380V ± 10% 50Hz;

2. Rated output capacity: 216KVA

3. Rated output voltage: 108KV

4. Output frequency range: 30-300Hz;

5. Output voltage waveform: sine wave, waveform distortion rate<0.5%;

6. Frequency adjustment sensitivity: 0.1Hz, instability ≤ 0.05%;

7. System noise: ≤ 60 dB

8. System measurement accuracy: Level 1

9. Output voltage instability<0.5%

10. Protection response time: 1us

11. Inductance nonlinearity: ≤ 0.5%

12. Under full power output, the continuous working time is>60 minutes;

13. Quality factor: Q ≥ 8

14. Environmental temperature: -15~+50 ℃ Relative humidity: ≤ 90% RH;

15. Altitude: ≤ 2000m;

Variable frequency series resonant withstand voltage test deviceSystem functions

1. The variable frequency power supply has two modes: automatic frequency regulation/automatic voltage regulation, and manual frequency regulation/manual adjustment, and can be switched freely;

2. Equipped with a large screen LCD Chinese display, displaying output voltage (effective value), output current (effective value), output frequency, excitation power, excitation current, pressurization time, and various related information;

Voltage, current, and time are pre-set and automatically timed. Once the preset time is up, the voltage will automatically decrease.

3. Capable of self diagnosis of system faults;

4. Equipped with various data printing functions. It can print relevant data such as test voltage, test time, test current (high voltage current), test frequency, excitation current, and capacitance of the test sample.

5. Protection functions and measures

1) Overvoltage protection: pre-set protection value, high voltage side sampling, quickly cut off output within 1 microsecond;

2) Flashover protection: When a flashover occurs during the test and the resonant circuit loses resonance, the power supply immediately stops outputting, and the screen prompts the message 'Flashover protection action';

3) Power failure protection: In the event of a sudden power outage during the test, the protective device will operate reliably and all units will remain intact;

4) Overcurrent and overheat protection: Overcurrent and overheat protection are dual. On the one hand, the IPM module itself has overcurrent and overheat protection functions, and on the other hand, Hall elements are used to sample the DC and provide hardware protection based on the capacity time curve. The protection action time is 1 microsecond;

5) Zero value operation protection: The system and variable frequency power supply have zero start and zero exit. If they are not closed from zero, the variable frequency power supply will not start.