Interlocking device for cable room door of medium voltage switchgear
A technology of interlocking device and cable room, applied in the field of interlocking device for cable room cabinet door of medium-voltage switchgear, can solve the problems of potential safety hazards of warning signs, low reliability of electrical interlocking, imperfect interlocking function, etc. Eliminate hidden dangers of misuse of electricity, improve equipment and personal safety, and improve the effect of safety and reliability
Active Publication Date: 2019-08-30
SHANGHAI MARINE EQUIP RES INST
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Problems solved by technology
[0004] Warning signs have great potential safety hazards, especially during maintenance, the operator may misuse without knowing the working status of the on-site power distribution device or when the power supply system is still supplying power, and the switchgear cable room door or cover plate Forcibly opened, which poses a greater threat to personal safety; the door or cover plate of the medium-voltage switchgear adopts electrical interlocking, and the potential safety hazards mainly come from the relatively low reliability of electrical interlocking or the ineffective interlocking function. Complete
Electrical interlocks often fail due to damage to electrical components or line failures, which brings potential safety hazards
Method used
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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] The interlocking device for the door of the cable room of the medium-voltage switch cabinet of the present invention is mainly used to ensure the safety of people and equipment during the inspection and maintenance process. The present invention adopts the design of mechanical interlock and electric interlock, programmed operation mode, mutual interlocking, and must be operated according to the design process in the operation process, ensuring the reliability of interlocking and the safety of equipment.
[0026] The present invention adopts the form of mechanical program lock and electrical component interlocking, and through the interlocking of components, it is ensured that the medium voltage switch cabinet is powered off and the front-end power supply is powered off, and the medium voltage switch cabinet cable can be opened through the mechanic...
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The invention relates to an interlocking device of a cable room cabinet door of a medium-voltage switch cabinet. The interlocking device is composed of a front cable room door, a travel switch, a program lock A, a program lock key, an interlocking plate, a latching electromagnet, a live display device, and a program lock B. The latching electromagnet, the program lock A, and the travel switch areinstalled at a mounting plate or closed device respectively. The live display device is installed at the front cable room door and is used for displaying whether an inlet side is electrified. The program lock B installed at a rear door of a switch cabinet or a rear cover plate is used for unlocking the rear door of the switch cabinet or the rear cover plate. A program lock A cylinder connecting rod in the program lock A is fixedly connected with the interlocking plate form interlocking and is interlocked with a front-end power supply by a travel switch contact. A latching electromagnet cylinder connecting rod in the latching electromagnet corresponds to an interlocking plate hole in the interlocking plate. A program lock B cylinder connecting rod in the program lock B corresponds to a cabinet fixation plate. A program lock key can be inserted into the program lock A or program lock B. The live display device is connected to the latching electromagnet.
Description
technical field [0001] The invention relates to a medium-voltage switchgear, in particular to an interlocking device for a door of a cable room of a medium-voltage switchgear. Background technique [0002] With the continuous expansion of the application range of medium-voltage switchgear and the continuous increase of application fields, the requirements for its safety are also getting higher and higher. Experience shows that a large number of misoperation accidents on medium-voltage switchgear should have been avoided, but they could not be avoided due to the imperfect interlock function, resulting in a large number of casualties and equipment damage. [0003] When the medium voltage switchgear is used as power distribution equipment, its charged state is determined by the state of the power supply system. Existing medium-voltage switchgear generally adopts warning signs or adopts electrical interlocking methods to prevent misoperation of the switchgear cable room door or...
Claims
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IPC IPC(8): H01H9/22
Inventor 张学瑾丁虎王良秀陈次祥殷非吴国栋薛君文勇曾志林倪凤燕
Owner SHANGHAI MARINE EQUIP RES INST