PD ultrasound automatic positioning system

The failure testing and positioning of operating the medium and large sized transformers have always been the points that electrical engineers focus for a long time. The HRJFD-2A system, manufactured in the large-sized transformer local discharge ultrasonic position method and equipment research subject which is one of the national key scientific and technological project has provided an effective solution.
The HRJFD-2A system has carried the ultrasonic measurement to the local discharge of the hundreds of transformers and reactor in Gezhou Dam 500kV switch station, Wuhan Phoenix Mountain 500kV transformer substation, Shengyang transformer factory, Hefei transformer factory, Hengyang transformer factory, Guangzhou power supply bureau, Hunan electricity generating board, Chongqing transformers factory and Wuhan steel. This system has the advantage of operation reliable and easy to operate. It can meet the needs of measurement. As one of the key items of the of eight-five project, this electrical device has been widely used for the spot test and research in the related unit in the north, east, central and northwest parts of China.
The HRJFD-2A ultrasonic positioning system which is including the high performance computer, high-sensitivity local discharge sound probe, programmed amplified filter, high-speed A/D transducer, transient waveform recording, signal analysis and fault location software is applied for acquiring, measuring, analyzing, positioning and spot observing the local discharge ultrasonic signal in the large-sized transformer, oil-immersed high voltage electrical apparatus and the GIS electrical operation equipment.
The HRJFD-2A ultrasonic positioning system can position the fault and the error is less than 250mm. The whole measuring system can find out the local discharge ultrasonic signal which is less than 1000pC.
Functions and characteristics:
(1) Making the detecting operation of local discharge ultrasonic more convenient and the analyzing more simple under the platform of the windows.
(2) Making the signal acquired more reliably for the ultrasonic sensor has the performance of low noise, high-sensitivity and anti-jamming.
(3) Making the spot testing more flexible with the local discharge ultrasonic signal electrical-acoustical position and acoustical-acoustical position functions
(4) Making the result of the position more precisely by choosing freely the spherical position calculation and the hyperboloid position calculation of the ultrasonic signal.
(5) Showing the position coordinates by ultrasonic probe and the locating point by solid geometric drawing.
(6) Convenient for building the measuring and positioning database for further analyzing and managing.
(7) Be the local discharge on-line detecting instrument which is useful for detecting the local generating and developing.

Technical parameter:
The sensitivity of the ultrasonic probe: -150dB
A/D conversion accuracy: 8bit±1/2LSB
Sample length: 32k/channel
Minimum detectable discharge:＜50pC (laboratory)＜300(1000)pC (spot)
Minimum positional error:＜50mm(laboratory)＜ 250mm (spot)

Warmly congratulate our company as the only company on winning the award “China Famous Brand” of the State Grid electricity power testing industry. The award is well-known by the Electric Power System of State Grid.

Wuhan Wugao HuaRui High voltage Technology Co.,Ltd.，whose preexistence is State Grid Wuhan High-voltage Testing Research Institute, has combined the essence of institutional reform and science & technology industry with the progress and development of high-voltage technology. 

As a Manufacture and Researcher having its own independent intellectual property rights, it is the domestic professional producer of transmission and transformation measuring and testing equipments of big current & high voltage in complete set. We also is the earliest institute who has researched and developed the technology of high voltage testers, which is applied by our competitors in manufacturing productions through technical transformation. In aspects of producing domestic testing and special transformers and its varieties, it is also one of the largest, the strongest and the most outstanding manufactures in production capacity and technology strength. Domestically, there are no companies preceding us in technically developing high-tech products and we are endowed with successful experience and accumulation of the sophisticated technologies. Situated in the high-and-new technology development zone of WuHan East-lake, it has foundered and registered as a joint-stock hi-tech company comprehensively covering doing research, design, manufacturing, sales and service support and applies the modernized and collectivize management system. The subsidiaries includes: the original Specialized Equipment of Power Testing Factory, Testing Transformer Factory, State Grid HuaRui High-voltage Technology Co.,Ltd.，