Mechanical interlocks for air circuit breakers
A technology of air circuit breaker and interlocking device, applied in the direction of circuits, electrical components, electric switches, etc., can solve problems such as fire and equipment damage, cause fire, equipment damage, etc., meet high safety requirements and improve safety performance
Active Publication Date: 2016-03-02
SCHNEIDER ELECTRIC IND SAS
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Problems solved by technology
[0009] Fire and equipment damage: For example, the common power supply supplies power to the load. For some reason, a circuit breaker gets a closing command, and the circuit breaker is closed due to the failure of the mechanical interlock device. At this time, a short circuit occurs between the common power supply and the backup power supply. , the equipment is damaged and there is a risk of fire
Method used
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Embodiment Construction
[0042] Preferred embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will understand the features and advantages of the present invention from the accompanying drawings and corresponding descriptions.
[0043] It is known to have a "breaker drive lever" on the main shaft of the breaker which can be mechanically interlocked. When the circuit breaker is in the open state, the "circuit breaker drive lever" is at a higher position ( Figure 3A); when the circuit breaker is in the closed state, the "circuit breaker drive lever" is in the lower position ( Figure 3B ). A "trip lever" is also installed on the circuit breaker at the same time. When the "trip lever" is in the higher position ( Figure 3B ), the circuit breaker can be closed; when the "trip lever" is in the lower position ( Figure 3A ), the closing operation of the circuit breaker cannot be realized.
[0044] The pr...
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A mechanical interlocking device for an air circuit breaker, including: a first circuit breaker trip lever driving member elastic element is installed on the first circuit breaker trip lever driving member, and a first circuit breaker spindle position identification elastic member is installed on the first circuit breaker trip rod driving member. The first circuit breaker spindle position identification piece; the elastic element of the second circuit breaker trip rod driving piece is installed on the second circuit breaker trip rod driving piece; the second circuit breaker main shaft position identification piece elastic element is installed on the second circuit breaker main shaft On the position identification part; the first cable is connected between the first circuit breaker main shaft position identification part and the second circuit breaker trip lever driving part; the second cable is connected between the first circuit breaker trip rod driving part and the second circuit breaker between the spindle position identification parts.
Description
technical field [0001] The present invention relates to a mechanical interlocking device, in particular to a mechanical interlocking device for an air circuit breaker. Operation of a circuit breaker. Background technique [0002] In the prior art, a general mechanical interlocking device is usually used between two circuit breakers that work together, and the state of one circuit breaker restricts the operation of the other circuit breaker. Such as figure 1 This kind of cable mechanical interlocking device is required in the dual power transfer switchgear shown to prevent the two circuit breakers from being closed at the same time, so as to avoid safety accidents such as short circuit of equipment and electric shock to personnel. With the progress of society, society has higher and higher requirements for enterprises and enterprises for themselves in terms of product safety performance. The safety performance of a product should not only be measured from the correct use s...
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IPC IPC(8): H01H9/26
Inventor 刘振忠
Owner SCHNEIDER ELECTRIC IND SAS