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Safety interlocking mechanism

A technology of interlocking device and connecting mechanism, applied in the direction of high-voltage/high-current switch, high-voltage air circuit breaker, electrical components, etc., can solve the problems of loss of visual confirmation of open circuit, oil switch damage, damaged oil switch, etc.

Inactive Publication Date: 2005-09-07
MCGRAW EDISON CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Examples

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Embodiment Construction

[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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Abstract

Safety interlocking mechainsm between vacuum cut-out and cut-off switch with visual contact circuit breaker. The interlock mechanism includes a moveable body with a notch configured to associate a position of the moveable body with a switching of the second switch. The associated position of the moveable body locates the notch in an engagement position when the switch is in a second position and locates the notch out of the engagement position when the switch is not in the second position. The interlock mechanism also includes a rod structured and arranged to engage the notch of the moveable body when the first switch is in a first position and to disengage the notch of the moveable body when the first switch is switched from a first position. When the rod engages the notch of the moveable body the rod blocks movement of the moveable body in a first direction thus preventing the second switch from switching from a second position, and when the notch of the moveable body is not in the engagement position then the rod may not engage the notch and the first switch is prevented from switching to a 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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Application Information

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Patent Type & Authority Patents(China)
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
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