Shulou(Shulou.com)05/31 Report--

Hello everyone, Lin Fei to answer the above questions, the correct wiring method of the voltage instrument, many people do not know the voltage instrument, now let's take a look!

With the rapid development of science and technology, especially in the electrical industry, the requirements for testing equipment are also very strict, because electricity is very dangerous, and if the equipment is not good, it will lead to very serious consequences. so the emergence of a lot of testing equipment has greatly improved our safety. Among them, the voltage tester is a new type of electrical testing instrument, which can be divided into electrical insulation strength tester, dielectric strength tester and so on. According to its function. And the accuracy of the endurance tester is also very high, which is widely liked by everyone.

What is the withstand voltage tester?

According to its function, the voltage tester can be called electrical insulation strength tester and dielectric strength tester. Its working principle is: within a specified period of time, the voltage applied to the insulators of the tested equipment is higher than the normal working voltage, and the voltage applied to it will only produce a very small leakage current, so the insulation is good. The test system consists of three modules: program-controlled power supply module, signal acquisition and conditioning module and computer control system. Select the voltage withstand instrument: the maximum output voltage and the maximum alarm current of the two indicators.

Operation procedure and usage of voltage withstand tester

1. Connect one end of the 0.7m standard resistance to the ground wire of the voltage withstand instrument.

two。 Turn on the power supply, set the leakage current of the instrument to 5mA and give an alarm.

3. If there is no alarm between 3410 volts and 3590 volts, the instrument will not work properly.

4. When it is found that the function of the equipment fails during the operation inspection, and the results of the operation inspection can not meet the specified requirements, the operator needs to retest the product that has been tested since the last operation inspection and send the instrument for maintenance.

Operating program

The operator's chairs and feet must be covered with rubber insulation pads. Only when the test light is off can the model under test be connected or disassembled without high voltage output.

1. Calibrate the instrument before testing. Method: when the leakage current is 5mA, connect 700K ceramic resistance between the grounding clip and the high voltage test probe until the instrument alarms.

two。 When connecting the model under test, when the voltmeter indicates "0" and the test lamp is off, clamp the instrument grounding clip on the cooling rack of the model under test and press the power switch of the model under test.

3. Set instrument test conditions: a, voltage: 3500V / b, leakage current: 5mAc. The timing of the test time is 4 seconds when the assembly line is produced.

4. Connect the probe of the test rod to any AC input metal plug at the end of the power cord.

5. Press the start button to observe the test results. If the super leakage light is not lit within the set time, the tested model is qualified.

6. If the tested model exceeds the set leakage current value, the instrument will automatically cut off the output voltage. At the same time, the buzzer will give an alarm and the leaking light will be on, so the type tested is not up to standard. Press the reset button to clear the alarm, and then press the start button again.

Endurance tester is also the most commonly used electrical testing equipment for electricians in our lives. The durability testing machine is mainly used for the voltage withstand test of polyethylene insulated power cable and the insulation voltage test of large power transformer. Not only is his accuracy high, but the endurance tester is also safe during testing. And the technology it uses is also very advanced, and the detection can be fully automated. The endurance tester has greatly improved people's work efficiency. I hope you who are engaged in the electrical industry can know more about endurance testers.

At the end of this article, I hope it will be helpful to you.

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