Research and Application of Testing Device for Comprehensive Performance of External Circuit Breaker

doi:10.16628/j.cnki.2095-8188.2023.01.014

Abstract

Abstract:

In view of the need to build different test environments for the external circuit breaker comprehensive performance testing in the laboratory,a multifunctional integrated external circuit breaker comprehensive performance testing device is designed to solve the problem of repetitive wiring between different test items.By analyzing the technical requirements of China Southern Power Grid Company Limited for external circuit breakers,the device uses computer,PLC,voltage regulator,relay,signal acquisition circuit and other components to design the software and hardware of the detection items with the similar detection principles,and complete the data acquisition analysis and conclusion determination of voltage,current and time signal changes.The device can be selected for level control,drive ability,leakage current,automatic closing time and other test items,which can effectively solve the problem of different test items need to build different test environment,have the characteristics of simple structure,high efficiency and reliability.

Key words: external circuit breaker, performance testing, signal acquisition circuit, relay

CLC Number:

TM561

ZHENG Jinbo, ZHENG Lejiang, YAN Xiangkun. Research and Application of Testing Device for Comprehensive Performance of External Circuit Breaker[J]. LOW VOLTAGE APPARATUS, 2023, 0(1): 78-83.

Figures/Tables 7

测量参数	电压/V	泄漏电流/mA	上电延时时间/s
$x —$	217.81	0.121	9.38
$∑ i = 1 n (x i - x —) 2$	0.089	0.000 090	0.016
ν=n-1	9	9	9
$u 1 = ∑ i = 1 n (x i - x —) 2 n × (n - 1)$	0.031	0.001	0.013

测量参数	电压	泄漏电流	时间
U_rel(k=2)	0.50%	0.56%	1.50%
u₂= $U k$	0.55 V	5.6×10^-4 mA	7.5×10^-2s

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序号	不确定度来源	标准不确定度值			自由度
序号	不确定度来源	电压/V	电流/mA	时间/s	自由度
1	测量重复性u₁	3.1×10^-2	1.0×10³	1.3×10^-2	9
2	检测装置u₂	0.55	5.6×10⁴	7.5×10²	∞

类型	电压/V	电流/mA	时间/s
合成标准不确定度u_c	0.55	1.1×10^-3	0.076
扩展不确定度U(k=2)	1.10	2.2×10^-3	0.15

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