AC HiPot Test Set| Detailed introduction of technical principles

The core principle of a high-voltage withstand voltage test device is to apply a test voltage higher than the rated operating voltage to the insulation system of electrical equipment, and verify its insulation strength within a specified time, thus validating its ability to withstand overvoltage and maintain long-term stable operation.

The core process is as follows:
1. Applying high voltage: A specified high test voltage is generated by a high-voltage generator (AC power frequency, DC, or variable frequency resonant, etc.) and smoothly applied to the insulation of the equipment under test.

2. Continuous withstand voltage: The test voltage is maintained for a preset duration (e.g., 1 minute) to simulate the long-term stress of the insulation under overvoltage.

3. Monitoring and judgment: Throughout the process, the leakage current is closely monitored for any abnormal increase, and the insulation is observed for breakdown or flashover. If the leakage current does not exceed the limit and the insulation is not damaged within the specified time, the insulation strength is deemed  (qualified).

This test is a destructive test that can effectively detect concentrated insulation defects and is a key test to ensure the safe operation of power equipment. AC high-voltage tester, used for AC high-voltage testing of GIS (Gas Insulated Switchgear). High-voltage withstand voltage tester 8100kVA 500kV 30-300Hz. This high-voltage withstand voltage testing device is mainly designed for AC withstand voltage testing of 110kV, 220kV, 1000mm² cables.

It is also designed and manufactured for testing 110kV, 220kV and below circuit breakers, GIS, PT (Power Transmission Unit), CT (Cyclic Transformer), and insulators.

With a wide range of applications, it is an ideal withstand voltage testing equipment for municipal, county-level high-voltage testing departments and power installation and maintenance engineering units.

The device mainly consists of a frequency converter, excitation transformer, reactor, and capacitive voltage divider.

1. AC withstand voltage test for 1000mm², 110kV cable, length 10km, capacitance ≤2.31uF, test frequency 30-300Hz, test voltage 128kV

2. AC withstand voltage test for 1000mm², 220kV cable, length 4km, capacitance ≤0.688uF, test frequency 30-300Hz, test voltage 216kV

3. Circuit breakers, GIS (5 bays), PTs, CTs, and insulators of 220kV and below, test frequency 30-300Hz, test voltage 460kV, test time 1min

4. Circuit breakers, GIS (10 bays), PTs, CTs, and insulators of 110kV and below, test frequency 30-300Hz, test voltage 265kV, test time 1min

1. Features overvoltage, overcurrent, zero-position start, and system detuning (flashover) protection functions.

2. The equipment's weight and volume are 1/10-1/30 of ordinary testing equipment. The power required for testing is only 1 Ω of the testing capacity.

3. The device has three operating modes: fully automatic mode, manual mode, and automatic tuning/manual voltage boost mode.

4. Data storage and printing: Stored data is numbered for easy user identification and retrieval.

5. The starting frequency can be arbitrarily set within a specified range during automatic frequency sweep.

6. DSP platform technology: Functions can be added, removed, and upgraded according to user needs; the human-machine interface is more user-friendly.

7. Improved output voltage waveform.

8. Prevents large short-circuit currents from burning fault points.

9. No recovery overvoltage will occur.

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