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Voltage testing device for grid of low voltage circuit breaker

A low-voltage circuit breaker and voltage testing technology, which is applied in the direction of circuit breaker testing, measuring devices, and voltage-only measurement, can solve problems such as the inability to directly obtain the grid cutting arc effect quantitatively

Pending Publication Date: 2019-02-19
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the grid cutting arc effect cannot be obtained quantitatively and directly in the prior art, the present invention proposes a low-voltage circuit breaker grid voltage testing device

Method used

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  • Voltage testing device for grid of low voltage circuit breaker

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Embodiment 1

[0034] The schematic diagram of the composition of the grid voltage testing device of the low-voltage circuit breaker in this embodiment is as follows: figure 1 As shown, the test device includes a current measuring coil, a Hall voltage sensor, an overcurrent and overvoltage protection module, a photoelectric isolation module, and a post-processing computer.

[0035] The grid voltage signal is drawn out through the air outlet of the circuit breaker through a thin flexible wire with high temperature resistance and high dielectric strength connected in front of the grid side, and is connected with the Hall voltage sensor to generate a low voltage signal. The grid voltage signal line connection method is as follows figure 2 As shown, the connecting thin flexible wire 3 is connected to the measuring grid 1 by welding or punching small holes on the grid, and is led out from the air outlet 4 opened above the baffle 2 along the outer wall of the circuit breaker.

[0036] The arc cu...

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Abstract

The invention relates to a voltage testing device for a grid of a low voltage circuit breaker, which comprises a grid connection module, a voltage measurement module, a current measurement module, anisolation and protection module, a data acquisition module, a data transmission line and a data processing terminal. One end of the grid connection module is connected to an arc extinction grid of thecircuit breaker and the other end is connected to the voltage measurement module. The voltage measurement module and the current measurement module are respectively connected to the isolation and protection module. The isolation and protection module is connected to the data acquisition module. The data acquisition module is connected to the data processing terminal. The data transmission line isused for communication and shielding between the data acquisition module and the data processing terminal. According to the voltage testing device, the effect of cutting the arc by the grid can be quantitatively and directly obtained, so that the space-time characteristics of the arc in the arc extinguishing chamber during the breaking process of the circuit breaker can be judged to guide the development and optimization design of the circuit breaker.

Description

technical field [0001] The invention relates to a circuit breaker testing device, in particular to a low-voltage circuit breaker grid voltage testing device. Background technique [0002] Low-voltage circuit breakers widely use grid arc extinguishing technology, which mainly provides a large number of near-pole voltage drops through grid cutting arcs, thereby increasing arc voltage. The test of grid cutting effect on arc cutting is of great significance for circuit breaker performance evaluation and optimization design. However, the physical process of metal grid cutting arc is very complex, and the previous testing technologies such as high-speed cameras and optical fiber arrays cannot quantitatively and directly obtain the grid cutting arc effect. SUMMARY OF THE INVENTION [0003] technical problem to be solved [0004] In order to solve the problem in the prior art that the grid cutting arc effect cannot be obtained quantitatively and directly, the present invention pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R19/00
CPCG01R19/0084G01R31/3277
Inventor 赵虎李兴文
Owner NORTHWESTERN POLYTECHNICAL UNIV
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