Calibration device for dielectric strength tester of insulating oil

1.1 Instrument Introduction

It can complete the detection of performance parameters such as breakdown voltage, boost rate, and waveform distortion of the insulation oil dielectric strength tester, and automatically provide a detection result report. This device uses the voltage at the moment of breakdown of the insulation oil dielectric strength tester as the detection basis to calculate the instrument's error. Compared with the previous steady-state calibration method, it is more intuitive, accurate, and effective.

1.2 Characteristics and technical parameters

1.2.1software system

The hardware and software characteristics of the verification device include:

1）Adopting active breakdown method, constructing breakdown conditions at fixed points, and detecting the reading error of the breakdown voltage of the test sample.

2）Real time display of the output voltage waveform of the test sample, recording the voltage waveform at the moment of breakdown of the test sample, can facilitate the analysis of the cut-off time of the test sample.

3）2Sampling of high-voltage signals and simultaneous detection of high-voltage signals from the two high-voltage arms of the insulation oil dielectric strength tester.

4）The instrument can automatically generate format specificationsWORDTest report.

5）The experimental environment and instrument settings for various experiments are automatically saved.

6）Automatically calculate test parameters for various experiments.

7）Real time drawing of experimental curves and providing multiple curve analysis tools, allowing users to perform arbitrary scaling and positioning operations on the curves.

1.2.2Technical Specifications

1）10kV～100kVMeasurement error less than0.2%±0.04kV；

2）The measurement error of boost rate is less than0.5%；

3）Time reading resolution39us；

4）Power supplyAC220V±10% 50Hz；

5）Maximum measured voltage:100kV（-50kV～50kVNot connected to the high-voltage breakdown control box);

6）Maximum breakdown voltage:80kV；

7）Voltage divider capacitance value10pfThe highest measured voltage50kV（50Hz/60Hz）；

10）Maximum allowable input voltage for high-voltage breakdown control box80kV.

11）Computers that support application software systems must meet the following requirements:

1> CPUclock rate>1.5GHz；

2>System memory>1GB；

3>The operating system of the computer isWindows XP/ Windows 7；

4>Computer's hard drive>40G；

5>haveUSB2.0Interface.

1.2.3application field

1）Steady state error verification of insulation oil dielectric strength tester;

2）Verification of breakdown error of insulation oil dielectric strength tester;

3）Calibration of boost rate for dielectric strength tester of insulating oil;

4）Calibration of waveform distortion rate for dielectric strength tester of insulating oil.