Detailed wiring method of hipot test, how to use hipot insulation tester

A typical hipot test is described below.

Method:1Check to confirm that the main power switch of the hipot tester is in the "off" position.

2.Unless the instrument is specially designed, all non-charged metal parts must be reliably grounded.

3.Put wires or terminals on all power inputs of the device under test.

Connect. 4.Close all power switches, relays, etc. of the device under test.

5.Set the test voltage of the hipot tester to zero.

6.Connect the high voltage output cable (usually red) of the hipot tester to the power input of the device under test.

7.Ground the circuit of the hipot tester.

Usually black) is connected to the uncharged metal portion of the device under test.

8.Turn the main power supply of the withstand voltage tester on and off and slowly increase the secondary voltage of the instrument to the required value. Generally, the boost speed does not exceed the speed of 500 V sec.

9.This test voltage is maintained for a specified period of time.

10.Slowly lower the test voltage.

11.Disconnect the main power switch of the hipot tester. First disconnect the high-voltage output line of the hipot tester, and then disconnect the circuit grounding wire of the hipot tester.

The following conditions indicate that the device under test will not pass the test

When the test voltage does not rise to the specified voltage value or the voltage drops.

When a warning signal appears on the hipot tester.

It is important to note that special care must be taken when performing the test due to the presence of high voltages that are dangerous to people in the hipot test.

Here are a few things to keep in mind:

It must be stipulated that only trained and authorized personnel are allowed to enter the test area to operate the instrument.

Fixed, visible warning signs must be placed around the testing area to prevent other personnel from entering the danger zone.

When testing is carried out, all personnel, including operators, must be kept away from the test instrument and the equipment under test.

When the test instrument is started, never touch its output line.

The two AC wires are short-circuited to one end of the withstand voltage tester, and the ground wire is connected to the other end.

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The use of the pro-withstand voltage insulation tester is as follows:1Turn on the power supply, turn on the power switch of the withstand voltage tester, and turn on the device; Set the parameters such as alarm leakage current, test voltage and test time of the instrument according to the regulations.

2.The machine under test is connected to the low end of the hipot tester (lead wire plug-in plate), and the test wire should be in contact with the ground wire or housing of the test object. Round which 3

Then press the "Start Switch" button on the test probe, at this time, the "test" indicator light of the device is on, and the output voltmeter indicates that the standard setting value has been reached, that is, the power-on test has begun. 4.Within the set time, the ultra-leakage light is not lit, and the tested model is qualified.

5.If the machine under test exceeds the set leakage current value, the instrument will automatically cut off the output voltage, and at the same time, the sharpener will alarm, and the over-leakage light will be on, then the machine under test will be unqualified, at this time, release the "start switch" button on the handle of the test probe or press the reset button to clear the alarm sound, and press the start button again when testing. The control part is the core of the whole instrument, which controls the start, reset, sound and light alarm, timing, automatic cycle test and other functions of the whole instrument.

When the test voltage rises to the upper limit of the rising voltage and remains for 60s, the insulation of the object under test is not broken down in this process, that is, the test instrument of the withstand voltage insulation tester will prompt that the test is qualified; On the contrary, if the insulation of the DUT is broken down, and the current flowing through the DUT and the instrument at this time, the withstand voltage insulation tester will send out a current alarm, indicating that the test is unqualified. Hope mine can help you <>

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Summary. Connect the black probe of the hipot meter to the circuit board, then connect the red probe to the electronic components to be tested, and finally connect the power cord of the hipot gauge to a reliable power supply.

Connect the black probe of the hipot to the electric blind mid-circuit board, then connect the red probe to the electronic base impulse element to be tested, and finally connect the power supply line of the hipot to a reliable power supply.

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To carry out the hipot test, you first need to prepare a hipot tester, a good mold ground wire, a ground lug, an insulated cable and a conductor cable. Connect the grounding piece to the hipot tester, then connect the positive end of the conductor cable to the target to be measured, and the negative end to the hipot tester; Connect the positive end of the insulated cable to the target to be measured, and the negative end to the hipot tester. Finally, connect one end of the sock source ground wire to the withstand voltage tester, and the other end to a safe large ground or other metal part to start the withstand voltage test.

1. Check and confirm that the main power switch of the hipot tester is in the "off" position

2. Except for the special design of the instrument, all uncharged metal parts must be reliably grounded

3. Connect the wires or terminals of all power input terminals of the device under test

4. Turn off all power switches and relays of the device under test

5. Adjust the test voltage of the hipot tester to zero

6. Connect the high-trace differential voltage output line (usually red) of the hipot tester to the power input of the device under test

7. Connect the circuit grounding wire (usually black) of the hipot tester to the non-charged metal part that is accessible to the device under test

8. Close the main power switch of the withstand voltage tester, and slowly raise the secondary voltage of the attitude punch skin tester to the required value. Generally, the boost speed does not exceed 500V sec

9.The test voltage is maintained for a specified period of time

10. Reduce the test voltage

11. Turn off the main power switch of the hipot tester. First disconnect the high-voltage output line of the hipot tester, and then disconnect the circuit ground wire of the hipot tester

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Hello, I am a co-teacher who asks for a question, I am happy to serve you, please be patient for you immediately.

Check and confirm that the main power switch of the hipot tester is in the "off" position2Except for the special design hail grip of the instrument, all non-charged metal parts must be reliably grounded3Wires or terminals 4 that connect all power input terminals of the DUT and turn off all power switches and relay beam knowers of the DUT erasion.

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Operation method: 1) Turn on the power: Make sure the "Voltage Regulation" knob has been set to the "0" position, and then turn on the power switch.

2) Set the "leakage current" value: press the switch "15", adjust the "leakage current preset" potentiometer "14", and preset the "leakage current" to the required value.

3) Connect the cracked test specimen: According to the needs of the test specimen, connect the test line and the test specimen.

4) "Timing test": Put the timing switch "17" in the "timing" position, adjust the timing dial switch, set the required timing time, then press the "start" switch, and adjust the "voltage regulation" knob to make the output voltage to the desired value.

5) "Manual test": Put the timing switch "18" in the "manual" position and press the "start" switch.

6) During the test, if the detected "leakage current" value exceeds the set "leakage current" preset value, the instrument will automatically alarm and cut off the output voltage. At this time, just press the "reset" switch, and the instrument will return to the state to be tested. (If the external control test is used to test the over-leakage, the start switch on the test rod should be loosened before the test can be continued).

7) If the detected "leakage current" does not exceed the set value, the timer time will expire or the instrument will return to the state to be tested after pressing the "Closed Reset" switch.

8) Remote control test: Insert the five-pin plug on the remote control test into the socket on the instrument, and press the switch on the test rod to test. Note: When testing with a remote control test stick, the timing function of the instrument is invalid.

Perform hipot test steps:

Clamp one end of the withstand voltage tester directly on the lap shell of the equipment under test, connect the other end of the tester to the input power end of the equipment under test, and slowly adjust the voltage to the withstand voltage value that needs to be tested.

The withstand voltage test is one of the main methods to test the ability of electrical appliances, electrical equipment, electrical installations, electrical wiring and electrical safety appliances to withstand bending overvoltage. There are two types of work: frequency withstand voltage test and DC withstand voltage test. The test voltage of the power frequency withstand voltage test is more than one to several times of the rated voltage of the tested equipment, and not less than 1000 volts.

Its pressurization time: 1 minute for equipment with porcelain and liquid as the main insulation, 5 minutes for equipment with organic solids as the main insulation, 3 minutes for voltage transformers, and 10 minutes for oil-immersed power cables. The DC withstand voltage test can draw the leakage current-voltage characteristic curve by the value of the leakage current at different test voltages.

Electrical equipment can be tested to detect local defects in insulation, moisture and aging.

Generally, the cable is not marked with the withstand voltage value, but the maximum working voltage and the maximum working temperature, and the actual withstand voltage value is much higher than it.

If it is clearly marked with "withstand voltage value: how much, how much", then it is how much.

Determination of withstand voltage value: the high voltage output of the test device is connected to the core of the tested wire (other grounding) for a certain period of time (usually one minute), and it is qualified without breakdown.

1. Variable frequency power supply: the power supply of 220V 380V and 50Hz is changed to adjustable frequency and continuously adjustable voltage, and at the same time integrates the functions of operation, protection, control and monitoring;

2. Excitation transformer: boost the voltage output of the variable frequency power supply, and isolate the high voltage and low voltage at the same time;

3. High-voltage reactor: series resonance with capacitive sample;

4. Voltage divider: measure the high-voltage voltage value and low-voltage on the regulator;

Cable withstand voltage test.

Mainly used for: High-voltage cross-linked cables.

AC withstand voltage test;

Power frequency withstand voltage test of transformer.

and SF6 switches.

AC withstand voltage test;

4.Dynamo.

AC withstand voltage test;

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

Cable withstand voltage test.

Principle: When the loop frequency f=1 2 lc, the loop resonates, and the voltage on the sample is q times the output voltage of the high-voltage terminal of the excitation transformer. q is the system quality factor, that is, the voltage resonance multiple, which is generally tens to more than 100. First, the output frequency of the variable frequency power supply is adjusted to make the circuit resonate in series, and then the output voltage of the variable frequency power supply is adjusted under the condition of loop resonance to make the test voltage of the sample reach the test value.

Due to the resonance of the loop, a smaller output voltage of the variable frequency power supply can produce a higher test voltage on the test CX.