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The pulse impulse voltage test is mainly to check whether the electrical clearance and solid insulation inside the product can withstand the specified transient overvoltage.
It is common to have pulse impulse during product installation and use. When the device is energized, the internal electric clearance and solid insulation materials must withstand pulse impulse voltage. Pulse impulse voltage can be foreseen when:
Device energized in lightning condition
Device switched on and off in a transient state
Operating overvoltage, surge overvoltage
Test standard: IEC/EN/UL 61800-5-1, GB 12668.501, IEC 60950, and GB/T 16927 are commonly used.
Test conditions: The test pulse voltage value is related to the rated voltage of the product. The test is 3 consecutive impulse pulses at equal intervals.
| Product rated voltage (V) | Pulse voltage value (V) | Pulse test duration (S) | |
| Electricity to ground | Electricity to instrument | ||
| 220 (Three phase) | 2500 | 4000 | 20 |
| 220 (Single phase) overvoltage class II | 2500 | 4000 | 20 |
| 220 (Single phase) | 4000 | 6000 | 20 |
| 380 overvoltage class II | 2500 | 4000 | 20 |
| 380 | 4000 | 6000 | 20 |
| 525 | 6000 | 8000 | 30 |
| 590 | 6000 | 8000 | 30 |
| 660 | 6000 | 8000 | 30 |
Test equipment:
Pulse voltage generator, available for devices, single boards, complete machines, and other products, covering almost all INVT products.
1.Test voltage range: 1–20kV
2.Output waveform: 1.2/ 50us
3.Output polarity: Positive, negative, alternative
4.Pulse period: 5s-99s
5.Number of experiments: 1-999
6.Trigger mode: Automatic, manual, external trigger
Product improvement:
Piezoelectric effect: Enables rapid testing of the reliability of the internal insulation of electronic components or products.
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