Variable Frequency AC Resonant Hipot Test System for Substation
Product overview
The AC Resonant Test System is designed to perform AC withstand voltage tests on medium and high voltage electrical equipment like transformers, cables, motors, etc. It utilizes a fully resonant frequency tracking control circuit to automatically adjust to the resonance frequency of the test object.
This test system offers highly efficient resonant test power that can generate very high AC test voltages for equipment testing. The compact enclosure houses all the key components including the step-up transformer, programmed logic controller, human-machine interface, and protection devices.
Multiple protection functions are implemented to ensure the safety of operation. The test procedures and parameters can be flexibly configured through the human-machine interface. The test reports and data can be exported through digital interfaces.
Optional modules are available for automated test and control. The test system can also be tailored to different equipment test standards.
Working principle
- The device under test (such as transformers, cables, etc.) is connected to the output end of the test system. A resonant circuit is formed by the device under test and the internal inductors and capacitors of the test system.
- After the test system is started, it will automatically scan different frequencies to find the resonant frequency of the device under test. Once the resonant frequency is found, the test system will operate at that frequency and increase the output voltage to the set test voltage.
- In the resonant state, the test system can generate very high output voltages with low loss. This efficient power conversion can greatly shorten the test time and reduce energy consumption.
- The test system continuously tracks the resonant frequency by monitoring the output current, voltage and phase angle to ensure that the entire test process is in the optimal resonant state. This closed-loop control ensures test accuracy and repeatability.
- Once the test is completed, the test system will lower the output to a safe voltage and end the test process. Test data and reports will be stored in memory for future reference.
- Optional automated test procedures can automatically complete a series of tests according to pre-set test plans to reduce manual operations and improve test efficiency.
- Multiple protection functions such as overcurrent, overvoltage, system grounding, etc. can effectively ensure the safety of the test system and the device under test. Any failure will trigger an alarm and cut off the output.
Specifications
| Rated output voltage |
0-800kv(AC) or below |
| Output frequency |
20-300Hz |
| Waveform |
THD<1.0% |
| Max.capacity |
1000kVA and below |
| Duty cycle |
Continuous working time 15mins one time at full power output |
| Quality factor |
30-90 |
| Frequency adjustment sensitivity |
0.1Hz,instability<0.05% |
| Power supply |
380/220V±15% 50Hz±5% |
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