A dynamic and static contact structure for isolating switch in transformer
A technology of isolating switches and moving and static contacts, which is applied in the field of transformers, can solve problems such as easy intrusion of arcs and damage to transformer structures, and achieve a good effect of arc extinguishing function
Active Publication Date: 2019-04-16
ZHONGKE ELECTRIC POWER EQUIP GRP CO LTD
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AI Technical Summary
Problems solved by technology
In the transformer, the isolating switch is used to realize the on-off of the circuit between the transformer and the load, and the contact position of the moving and static contacts in the isolating switch is exposed when they are in contact. When the moving and static contacts are separated from each other, there is an arc, and the generated The arc is easy to jump into the conductor around the contact position of the moving and static contacts, causing damage to the internal structure of the transformer
Method used
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[0014] Such as figure 1 , figure 2 , image 3 As shown, a dynamic and static contact structure for a disconnector in a transformer includes a static contact seat 1 made of a disc-shaped insulating material. The concave hole 2, the bottom of the static contact seat 1 is connected with the common central axis of the insulating ceramic cylinder 3, the upper end surface of the insulating ceramic cylinder 3 extends into the static contact seat and extends to the bottom of the concave hole 2, and the upper end surface of the insulating ceramic cylinder 3 is provided with multiple Each air outlet 4 is distributed in a spoke shape around the center of the upper end surface of the insulating ceramic cylinder 3, and each air outlet 4 communicates with the inner bottom of the concave hole 2, and the upper end surface of the insulating ceramic cylinder 3 is located at the center and is formed with the central axis. The inverted flat-topped cone 5 protruding into the concave hole 2, the...
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The invention discloses a movable and fixed contact structure for an isolating switch in a transformer. The movable and fixed contact structure comprises a disc-shaped fixed contact base. A recessed hole in an inverted flat-top conical shape is disposed on the top surface of the fixed contact base. An insulating ceramic cylinder is connected with the bottom of the fixed contact base and has the same central axis with the fixed contact base. A plurality of air outlets are arranged on the upper end surface of the insulating ceramic cylinder. Each air outlet communicates with the bottom of the recessed hole. An inverted flat-top cone inserted into the recessed hole is formed at the center of the upper end surface of the insulating ceramic cylinder. The top of the fixed contact base is provided with a disc-shaped fixed contact. The center of the fixed contact is provided with an inverted flat-top tapered through hole. The bottom of a movable contact seat is provided with a movable contact in a shape matching that of the through hole in the fixed contact. The movable contact is stuck in the through hole of the fixed contact. The bottom of the movable contact is supported by the inverted flat-top cone at the center of the upper end surface of the insulating ceramic cylinder. The movable and fixed contact structure avoids arc shaking and has a good arc extinguishing function.
Description
technical field [0001] The invention relates to the field of transformers, in particular to a dynamic and static contact structure for an isolating switch in a transformer. Background technique [0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary winding, the secondary winding and the iron core. The wire ends of the primary winding and the secondary winding need to be connected to the terminal, and connected to other equipment through the terminal. In the transformer, the isolating switch is used to realize the on-off of the circuit between the transformer and the load, and the contact position of the moving and static contacts in the isolating switch is exposed when they are in contact. When the moving and static contacts are separated from each other, there is an arc, and the generated The arc is easy to jump into the conductor around the contact position of the moving and st...
Claims
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IPC IPC(8): H01H1/06H01H9/30
CPCH01H1/06H01H9/30
Inventor 王小飞朱海南李玉萍于锅宝林明敬熊国华林长康
Owner ZHONGKE ELECTRIC POWER EQUIP GRP CO LTD