Safety interlocking mechainsm between vacuum cut-ot and cut-off switch with visual contact circuit breaker
A technology of interlocking mechanism and connecting mechanism, which is applied in the direction of high-voltage air circuit breaker, high-voltage/high-current switch, electric switch, etc., and can solve the problems of damaged oil switch, opacity, loss of visual proof circuit breaker, etc.
Inactive Publication Date: 2002-10-09
MCGRAW EDISON CO
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Problems solved by technology
However, if the oil switch is used to switch on the load current, the oil switch may be damaged
For example, an electrical breakdown within an oil switch can severely damage the oil switch by reducing the insulating properties of the oil and by producing explosive gases
In addition, electrical breakdown can char the oil, making it opaque for extended periods of time, losing the ability to visually confirm an open circuit
Method used
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[0024] For purposes of illustration, the safety interlock mechanism described is associated with the switching elements of a primary high voltage switch and a secondary safety switch in series, preventing the use of the secondary safety switch from switching loads. In order to explain clearly, the switching mechanism of the primary high-voltage switch and the secondary safety switch is first explained. The operation of the secondary safety switchgear will also be explained, followed by a detailed description of the mechanism which interlocks the operation of the primary high voltage switch and the secondary safety switch. With regard to each of the above points, explanations will be made from the common elements of these mechanisms and the high correlation between them, and the functions, constructions and configurations of these elements will be explained in detail.
[0025] refer to figure 1 , the high voltage switchgear 100 defines a circuit 105 between a tap 110 and a pow...
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The invention relates to a safety interlocking mechanism between a vacuum breaker and a cut-off switch of a circuit breaker with visible contact, which comprises a movable body with a slot, and the slot associates the position of the movable body with the switching of the second switch. When the second switch is at the second position, the associated position of the movable body makes the notch in the engaged state, and when the second switch is not at the second position, the notch is disengaged from the engaged state. The interlocking mechanism also includes a rod constructed and arranged to engage with the notch of the movable body when the first switch is in the first position, and disengaged from the notch of the movable body when the first switch is switched from the first position . When the rod is engaged with the notch of the movable body, the rod blocks the movement of the movable body in the first direction, thereby preventing the second switch from being switched from the second position, and when the notch of the movable body is not in the engaged position, the rod may not engage with the movable body. The notches engage to prevent switching of the first switch to the first position.
Description
technical field [0001] The invention relates to high voltage electrical switchgear. Background technique [0002] For safety reasons, an open circuit should be visually verified before working on the high voltage distribution system. An open circuit may be caused by a high voltage load interrupter (switch) using oil or vacuum as the interrupting medium. Vacuum switches have extremely long life, and are resistant to degraded arcing by electrical breakdown. However, the contacts of the vacuum switch are contained in a sealed ceramic bottle, and its on / off status cannot be visually verified. [0003] Visual confirmation may be provided using an oil switch. Oil switches are usually designed and placed near windows in oil-filled tanks to provide the required visual disconnection. However, if the oil switch is used to switch on load current, the oil switch may be damaged. For example, an electrical breakdown within an oil switch can severely damage the oil switch by reducing ...
Claims
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IPC IPC(8): H01H33/26H01H9/26H01H33/52
CPCH01H9/26H01H33/52H01H33/26
Inventor 米格尔·博尼法西奥·雅玛特
Owner MCGRAW EDISON CO