Consequently the poking pole (114) drives the breaker action mechanism to achieve the closing and opening of the breaker.

The breaker has two contact electrodes (6, 7), which are arranged to be separated from each other at the opening of the breaker.

The holder assembly is capable of movement between a first position and a second position wherein the first position corresponds to a closed position of the circuit breaker and the second position corresponds to an open position of the circuit breaker.

A circuit breaker includes a housing (24,26) forming an opening.

A drive pin (13) is inserted into an opening (34) in a circuit breaker housing mounting surface (22).

Release of potential energy makes sliding of the moving contact at extremely fast manner.

The control component is configured to selectively control opening and closing of a breaker.

Lastly, the disposition of the circuit breaker rotary handle provides an indication of the conduction status of the molded case circuit breaker.

The invention relates to a circuit breaker system, especially an air-insulated medium voltage switchgear, with the functional features 'connect', 'disconnect' and 'earth'.

Each breaker includes an interlock display (6) for displaying interlock state of the breaker within the group to which the breaker belongs.

The circuit breaker accessory lever interlocks the circuit breaker closing button to prevent closing the circuit breaker contacts until such shunt trip activation voltage signal is turned off.

Other aspects are provided.

The circuit breaker electronic trip unit (17) is contained within a recess (24) in the circuit breaker cover (15) and is interlocked with the circuit breaker operating mechanism to articulate the operating mechanism upon removal.

The direct-current circuit breaker is novel in topology structure, and simple in control.

In addition, an opening for receiving the circuit breaker handle is located between the first and second vertical elements.