300mm2 frequency conversion series resonant withstand voltage device

NegotiableUpdate on 05/13

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The 300mm2 variable frequency series resonant withstand voltage device adopts a design concept, high-quality IGBT and drive circuit, which reduces output waveform distortion, has good frequency output stability, and has good IGBT, overcurrent, overvoltage (protection values can be manually adjusted according to needs) and discharge protection functions, which can protect the safety of equipment and personnel; When the test sample discharges or breaks down, due to the destruction of resonance conditions, the short-circuit current is small, only 1/Q of the test current of the test sample, avoiding damage to the test sample caused by breakdown.

Product Details

300mm2 frequency conversion series resonant withstand voltage devicetechnical indicators

1. Overall technical specifications

Output test voltage: 0-1000kV AC effective value

Output test current: 1-10A AC RMS

Output frequency: 20-300Hz

Resonant voltage waveform: sine wave, waveform distortion rate:<1%

Types of test subjects: various power transformers, power cables, generators, GIS and other equipment.

Working system: Under full power output, continuous working time of 30 minutes

Quality factor: 20-80, depending on different load conditions

application

Series resonance 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.

Mainly used in the following areas:

1. AC voltage withstand test of 6kV-500kV high-voltage cross-linked cable

2. AC voltage withstand test of generator

3. AC withstand voltage test for GIS and SF6 switches

4. Power frequency withstand voltage test of 6kV-500kV transformer

Main applications:

1. AC voltage withstand test of 6kV-500kV high-voltage cross-linked cable

2. AC voltage withstand test of generator

3. AC withstand voltage test for GIS and SF6 switches

4. Power frequency withstand voltage test of 6kV-500kV transformer

5. AC withstand voltage test for other high-voltage electrical equipment such as busbars, bushings, and transformers.

300mm2 frequency conversion series resonant withstand voltage deviceworking principle

We know that when the circuit frequency f=1/2 π√ LC, resonance occurs in the circuit, and the voltage on the test sample is Q times the output voltage of the excitation transformer high voltage end. Q is the system quality factor, which is the voltage resonance multiple, generally ranging from tens to hundreds or more. First, adjust the output frequency of the variable frequency power supply to induce series resonance in the circuit, and then adjust the output voltage of the variable frequency power supply under the condition of circuit resonance to achieve the test value of the sample voltage. Due to the resonance of the circuit, a smaller output voltage of the variable frequency power supply can generate a higher test voltage on the test sample CX.