SN10-10KV oil-minimum circuit breaker accessories: contact finger, sealing ring, moving contact
Contact Info
- Xiangyang Industrial Zone, Liushi Town, Yueqing City,
- 李经理
- 15167417505
- 864640886@qq.com
Explanations on the accessories (moving contact, roller gasket, contact finger) of the SN10-10kV/630A oil-minimum circuit breaker and the SN10 support post, sorted out based on currently available public materials, are as follows:
I. Explanations on main accessories
Moving contact
Usually made of copper-tungsten alloy, it features excellent arc resistance and electrical conductivity.
Installed at the end of the conductive rod, it moves up and down with the insulating pull rod to realize opening and closing operations.
During the opening process, the moving contact separates from the static contact, generating an arc which is extinguished by the insulating oil.
Roller gasket
It is part of the rolling contact assembly, used to reduce the friction between the conductive rod and the lower outgoing line.
It ensures good contact of the conductive circuit during movement and reduces the contact resistance.
Contact finger (static contact finger)
Located on the static contact holder, it is often inlaid with copper-tungsten alloy and cooperates with the moving contact to form a current-carrying loop.
It provides a stable current-conducting path in the closed state and bears the impact of short-circuit current.
II. Explanations on SN10 support post
The "SN10 support post" usually refers to a support insulator or post insulator, whose functions include:
Mechanical support: Fix the oil tank and conductive components to maintain structural stability.
Electrical insulation: Isolate the high-voltage conductive parts from the grounded frame to meet the insulation requirements of the 10kV voltage level.
Installation specifications:
The flange surfaces of the supporting porcelain bushing should be on the same horizontal plane;
The center line error of the three-phase support posts ≤ 5mm;
The number of gaskets between the base and the foundation shall not exceed 3, and the total thickness ≤ 10mm.
III. Supplementary information
SN10-10/630A means:
SN: Indoor oil-minimum circuit breaker;
10: Design serial number;
10: Rated voltage 10kV;
630A: Rated current 630A.
This series of circuit breakers has basically been replaced by vacuum circuit breakers, with limited market stock, but some manufacturers still provide accessories.
For accessory procurement, you can contact Yueqing Hengzhao Electric Co., Ltd.
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