A circuit breaker with ground connection protection

Abstract

The invention discloses a breaker with grounding connecting protection. The breaker comprises a shell and a free tripping mechanism, a grounding mechanism, an interlocking mechanism and an electrifying indicating mechanism which are arranged in the shell, wherein the shell comprises an upper cover and a base; the grounding mechanism comprises an operation component, a static contact, a moving contact, a grounding terminal, a torsion spring, a conducting strip, a moving contact support and a connecting rod; the electrifying indicating mechanism comprises a circuit board, a ship-shaped switch, a conducting strip and an indicator, a diode and a resistor arranged on the circuit board; the interlocking mechanism comprises a connecting rod, a pushing rod, a jacking rod, a blocking sheet and a tension spring; one end of the blocking sheet is pivoted on the upper cover; the tension spring is arranged on the blocking sheet. According to the invention, a leading-out terminal circuit is grounded through the grounding mechanism; the free tripping mechanism and the grounding mechanism are interlocked through the interlocking mechanism; no switch-on while grounding and no grounding while switching on are guaranteed; the grounding connection operation can be performed while switching off; the breaker has a function of indicating if the circuit is electrified; the safety of the maintenance personnel can be guaranteed.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a circuit breaker with ground connection protection. Background technique [0002] Such as Figure 1-4 As shown, there is an existing structure of a circuit breaker, which mainly includes a base 10, an upper cover 20, a free release mechanism 30, a rotating shaft 40, a moving contact 50, a static contact 60 and an arc extinguishing chamber 70 arranged on the base 10, wherein Free release mechanism 30 is made up of structures such as draw bar 301, lever 302, support 303, upper connecting rod 304, spring 305, push rod 306, lock catch 307, jumper 308 and operating handle 309, and operating handle is installed on the push rod 306 309, the operating handle 309 is connected with the lever 302, and the drawbar 301 is connected with the thermal-magnetic tripping system 80. The thermal-magnetic tripping system 80 includes a bimetal 801, an armature 802, an extension spring 803, an adjusting screw 804,...

AI Technical Summary

Problems solved by technology

[0003] Nowadays, with the improvement of safety requirements for power distribution schemes, maintenance personnel need to manually ground each phase line at the outlet end of the circuit breaker when repairing the line. The process is cumbersome and the connection is not necessarily reliable.

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