Wuhan UHV Power Technology Co., Ltd. products

The UHV Series Resonant System is specifically designed for conducting AC withstand voltage tests on high voltage capacitive equipment such as cross-linked cables, hydraulic generators, main transformers, and Gas Insulated Switchgear (GIS). The system is ideal for use by local, municipal, and country-level high voltage test departments and electric power installation and maintenance units. Its core components include a frequency conversion control power supply, an excitation transformer, a high voltage reactor, a capacitor voltage divider, and an optional compensation capacitor. The device provides robustness with features like overvoltage, overcurrent, and flashover protection, while offering flexibility through three operational modes: fully automatic, manual, and automatic tuning manual boost. The user-friendly interface employs DSP platform technology and allows data storage and retrieval for efficient testing ascertainment.

The UHV-2000A multi-channel partial discharge detector is a 2-channel, desktop, TFT LCD display with reliable system and low failure rate. In addition to being used for partial discharge measurement of high-voltage electrical equipment (standard), it can also be used for online continuous monitoring of partial discharge of high-voltage electrical equipment such as large power transformers (optional). Truly achieving the integration of partial discharge measurement and online monitoring functions. This local discharge device is a specialized instrument for measuring and analyzing the insulation performance of power equipment. This system adopts modern electronic and computer integrated technology to achieve signal amplification (analog, electronic, digital), filtering, data acquisition, data processing, graphic display, and automatic generation of test reports, thereby completing partial discharge measurement and fault diagnosis. The scope of application, detection method, test circuit, technical performance parameters, etc. of this discharge meter fully comply with the requirements of the international standard IEC 60270-2000, the national standard GB/T 7354-2003 "Partial Discharge Measurement", and DL/T 417-2006 "Guidelines for On site Measurement of Partial Discharge in Power Equipment".

ZGF series Series dc high voltage generators adopts high frequency voltage doubler circuit, adopts advanced PWM high frequency pulse width modulation technology, closed loop adjustment, and adopts large voltage feedback, which greatly improves voltage stability. Use high-power IGBT devices and drive technology with superior performance, and adopt special shielding, isolation and grounding measures according to electromagnetic compatibility theory. The Series dc high voltage generators are made of high quality, portable, and capable of withstanding rated voltage discharge without damage. It has the characteristics of large output power and small volume, reliable over-voltage, over-current and zero-closing protection, with 0.75 times voltage switching function. It is mainly used in the power sector, industrial and mining, metallurgy, steel and other enterprise power departments to conduct DC withstand voltage test or DC leakage current test on high-voltage electrical equipment such as zinc oxide surge arresters, power cables, transformers, circuit breakers and generators.

At present, the contact resistance measurements of the conventional type QJ44 arms widely used in electric power system dc bridge, and this kind of bridge test current mA level only, it is difficult to find circuit conductor cross-sectional area to reduce defects, when measuring contact resistance high-voltage switch electric circuit, due to the contact between the oil film and the influence of the oxide layer, several times the measured value is big, can't reflect real contact resistance.Therefore, the standard sd301-88 ac 500kV power equipment handover and preventive test regulations and the new version of preventive test regulations for power equipment stipulate that the measuring current of circuit breaker and isolating switch contact resistance is not less than dc 100A to ensure the accuracy of test results.