Tianjin Pinggao Intelligent Electrical Co.

Tianjin, China

Tianjin Pinggao Intelligent Electrical Co.

Tianjin, China
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Li M.,Tianjin Pinggao Intelligent Electrical Co. | Li D.,Tianjin Pinggao Intelligent Electrical Co. | Wang X.,Tianjin Pinggao Intelligent Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2017

To understand the effect of rabbet assembly position of moving and static contacts on performance of vacuum interrupter, simulation and experimental methods were employed to analyze the performance of a vacuum interrupter with different rabbet assembly position, and the effects of rabbet assembly position on magnetic flux density and arc pattern were obtained. The results showed that when the dislocation degree of rabbet was 45°, the maximum value of magnetic flux density was 63.71, 64.31 and 64.18 mT, respectively; the arc had smaller size, more stable movement, and the voltage of 36 V; and the interruption performance of the vacuum interrupter was better. So it is concluded that the interruption performance of the vacuum interrupter can be improved at 45° dislocation of rabbet in assembly. © 2017, Xi'an High Voltage Apparatus Research Institute Co., Ltd. All right reserved.


Li M.,Tianjin Pinggao Intelligent Electrical Co. | Wang N.,Tianjin Pinggao Intelligent Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2017

To reduce the reignition rate of a vacuum interrupter in switching back to back capacitor bank, the effects of voltage ageing, current ageing and nanosecond pulse ageing on the 40.5 kV vacuum interrupter for switching back-to-back capacitor bank are investigated, hence effect of ageing method on 40.5 kV vacuum interrupter for switching back-to-back capacitor bank is obtained. The contact surface can be aged completely by the nanosecond pulse ageing method, while the contact surface can only be partly aged by the voltage or current ageing method. The vacuum interrupter aged by the nanosecond pulse ageing method can successfully pass the switching test of back-to-back capacitor bank. The vacuum interrupter aged by the current ageing method can pass the switching test of back-to-back capacitor bank for 16 times, then reignition occurs. The vacuum interrupter aged by the voltage ageing method can pass the same test for only once, then reignition occurs 300 ms after the switching. © 2017, Xi'an High Voltage Apparatus Research Institute Co., Ltd. All right reserved.


Zhang X.,Tianjin Pinggao Intelligent Electrical Co. | Wang X.,Tianjin Pinggao Intelligent Electrical Co. | Liu Y.,Tianjin Pinggao Intelligent Electrical Co. | Xue C.,Tianjin Pinggao Intelligent Electrical Co. | And 2 more authors.
Gaoya Dianqi/High Voltage Apparatus | Year: 2017

The objective of this paper is to determine a ¾ coil-type axial magnetic field(AMF) contact used in 126 kV vacuum interrupters. The characteristics of magnetic field and the behaviors of vacuum arc are studied by means of electromagnetic simulation and arcing experiment. The AMF distribution and resistance are compared for eight contact plate slots positions and locations, diversion row. Two types of slot positions without the diversion row and one type structure with the diversion row are tested in the arcing experiment. The slot positions of contact type 2 and contact type 3 are left and right, respectively. Arc current is 40 kA(rms). Arc duration in first current half-wave is set as 9 ms. The simulation and experiment results show that the AMF is higher and more uniform for contact type 3, and it has higher diffuse arc mode duration before current zero. In the second half-wave peak current, vacuum arc is more intense between the contacts with the diversion row, which is in the concentrated mode. The anode jets begin to form and it reach the cathode. The experiment and simulation results show that the ¾ coil-type contact used in 126 kV vacuum interrupter is determined as contact type 3 without the diversion row, in which the slot position is right and the installation location is that the upper contact corresponds to the lower contact. © 2017, Xi'an High Voltage Apparatus Research Institute Co., Ltd. All right reserved.


Li M.,Tianjin Pinggao Intelligent Electrical Co. | Wang X.,Tianjin Pinggao Intelligent Electrical Co. | Li W.,Tianjin Pinggao Intelligent Electrical Co. | Sun S.,Tianjin Pinggao Intelligent Electrical Co.
2015 3rd International Conference on Electric Power Equipment - Switching Technology, ICEPE-ST 2015 | Year: 2015

This paper introduces a new type TMF-AMF contact which used in high current interruption process. It has lower bulk resistance (3.28μΩ) of the conductive circuit compared with conventional one by introducing a 4 turn TMF coil and a 6 turn AMF coil. When the current is 1000A, the maximum value of B-field of radial TMF is 13.95mT, the maximum value of B-field of tangential TMF is 6.61mT, and the maximum value of B-field of AMF is 4.14mT. The maximum value of phase difference is 10.02°. The vacuum arc diffuses and turns between the contacts. The maximum value of vacuum arc voltage is 23.2V. © 2015 IEEE.


Yang L.,Tianjin Pinggao Intelligent Electrical Co. | Li M.,Tianjin Pinggao Intelligent Electrical Co. | Wang X.,Tianjin Pinggao Intelligent Electrical Co. | Sun S.,Tianjin Pinggao Intelligent Electrical Co. | Li W.,Tianjin Pinggao Intelligent Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2015

The magnetic flux density and electromagnetic force of different structures of transverse magnetic field (TMF)contacts are analyzed by using simulation method, and the effects of the contact structure on magnetic flux density and electromagnetic force are obtained. The results show that; 1)the maximum value of magnetic flux density of the 16-turn TMF contact is 49.21 mT, the 4-turn TMF contact 63.86 mT, and the screw slotted TMF contact 74.54 mT; 2)the arc model's electromagnetic force of 16-turn TMF contact is 0.042 1 N, the 4-turn TMF contact 0.063 6 N, and the screw slotted TMF contact 0.117 6 N. ©, 2015, Xi'an High Voltage Apparatus Research Institute. All right reserved.

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