Design and Application of Air Circuit Breaker Double-Key Lock

doi:10.16628/j.cnki.2095-8188.2023.01.013

Abstract

Abstract:

The key lock attachment of the air circuit breaker can provide the protection for the power system's power safety and energy saving.The structure and working principle of the existing air circuit breaker key lock are introduced,and some examples of its application scenarios in the power supply system are given.On the basis of the existing key lock,the design is improved,and a newstructure of the double key lock is proposed,which plays an important role in the power outage maintenance,power allocation and prevention of personnel misoperation in some power supply systems with a large number of power supplies and complex interlocking logic.

Key words: dual key lock, interlocking, split and close, prevent misuse, power supply system applications

CLC Number:

TM561

WANG Yuxiang, YUAN Bo, LINGHU Shaojiang, LIU Mi, HE Xin, CHENG Liyu. Design and Application of Air Circuit Breaker Double-Key Lock[J]. LOW VOLTAGE APPARATUS, 2023, 0(1): 73-77.

Figures/Tables 13

References 10

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方式类型	QF1	QF2	QF3	说明
方式一	1	1	0	两路电源分列运行
方式二	1	0	1	变压器1供两路
方式三	0	1	1	变压器2供两路
方式四	1	0	0	变压器1单独运行
方式五	0	0	1	变压器2单独运行

方式类型	QF1	QF2	QF3	QF4	QF5	说明
方式一	1	0	1	0	1	3路电源分列运行
方式二	1	0	1	1	0	变压器1与变压器2双供电
方式三	0	1	1	0	1	变压器3与变压器2双供电
方式四	1	1	0	0	1	变压器3与变压器1双供电
方式五	1	1	0	1	0	变压器1单供电
方式六	0	1	1	1	0	变压器2单供电
方式七	0	1	0	1	1	变压器3单供电

方式类型	QF1	QF2	QF3	QF4	说明
方式一	1	1	0	0	两路电源分列运行
方式二	1	0	1	0	变压器1供两路
方式三	0	1	1	0	变压器2供两路
方式四	0	0	0	1	发电机供两路

方式类型	QF1	QF2	QF3	QF4	QF5	说明
方式一	1	0	1	0	0	两路电源分列运行
方式二	1	1	0	0	0	主变压器1供两路
方式三	0	1	1	0	0	主变压器2供两路
方式四	0	1	0	1	0	备用变压器供两路
方式五	0	1	0	0	1	发电机供两路

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