This catalog is carefully selected for you by Shanghai Xuji Electric Co., Ltd.:
GIS AC Withstand Voltage Test Instrument Product Introduction
The TPXZB series GIS AC Withstand Voltage Test Instrument (Variable Frequency Series Resonance Test Device) professionally developed by Yangzhou Dali is widely used in electric power, metallurgy, petroleum, chemical and other industries. It is suitable for capacitive test objects with large capacity and high voltage, such as generators, transformers, GIS, high-voltage cross-linked cables, transformers, bushings, etc. for handover tests and preventive tests. Our company has independently developed frequency conversion and voltage regulation software technology in the field of variable frequency series resonance high-voltage testing, which is superior to the domestic high-voltage testing industry. Using this technology, we adopt 16-bit fine frequency conversion, 10KHZ carrier frequency, SPWM and imported original IPM overall module design to manufacture a complete set of variable frequency series and parallel resonance test devices, fully complying with the national regulations and requirements for high-voltage testing.
GIS AC Withstand Voltage Test Instrument Working Principle
The variable frequency series resonance test device uses the principle of series and parallel resonance. By adjusting the output frequency of the variable frequency controller, the inductance L of the reactor in the circuit and the capacitance C of the test object resonate, and the resonance voltage is the voltage applied to the test object. The power supply is provided by the frequency modulation controller. After the test voltage is initially boosted by the excitation transformer, the high voltage is applied to the reactor L and the test object CX. By changing the output frequency of the frequency modulation controller, the circuit is in a series resonance state; the resonance frequency of the circuit depends on the capacitance CX of the test object and the inductance L of the reactor. Adjust the output voltage of the variable frequency controller so that the high voltage on the test object reaches the required voltage value.
GIS AC Withstand Voltage Test Instrument Product Features
Large screen displays test data, test status, and has real-time operation step prompts
Flexible setting of test voltage, frequency range, and pressurization time
Test results can calculate the capacitance of the test object
Has computer communication interface for easy communication and test data management
Small size, light weight, easy operation
High resolution, frequency resolution of 0.001HZ
High safety and reliability, the system has overcurrent, overvoltage and discharge protection functions, effectively protecting personal and equipment safety. Test results can be printed and software can be upgraded.
GIS AC Withstand Voltage Test Instrument Complete Set Composition
The complete set consists of variable frequency voltage regulating power supply, excitation transformer, reactor, voltage divider and compensation capacitor.
GIS AC Withstand Voltage Test Instrument Technical Parameters
Ambient temperature: -10～45℃
Ambient humidity: ≤90%
Altitude: ≤2000M
Power input: 220V±10% single phase 50Hz output 0～220V(≤10KW)
380V±10% three phase 50Hz output 0～400V
Rated test capacity: 0～8000KVA (optional)
Resonant voltage: 0～1000KV (optional)
Frequency adjustment range: 0.1～300Hz
System measurement accuracy: 0.5 level
Frequency adjustment resolution: 0.01Hz
Instability: ≤0.05%
Output waveform: sine wave
Waveform distortion rate: ≤0.5%
Noise: ≤60dB
Reactor Q value: 30～200 (optional)
Note: The above information and technical parameters are compiled and released by Yangzhou Dali Electric Co., Ltd.
