| Breaking Capacity: | High Voltage Circuit Breakers |
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| Arc-extinguishing Medium: | SF6 |
| Installation: | Open Frame |
| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier 
LW3-12 primary and secondary fusion SF6 circuit breaker (hereinafter referred to as circuit breaker) is a new generation of products developed by our company according to the requirements of the national grid primary and secondary fusion complete set of column switches.
The circuit breaker meets the requirements of the primary and secondary fusion set of column switches in the national grid, and has the advantages of compact structure, reasonable layout and complete functions. The indicators of the circuit breaker are in line with the requirements of the State grid primary and secondary fusion complete set of column switches, and through the China Electric Power Research Institute Co., Ltd. primary and secondary fusion special testing.
The circuit breaker adopts three-phase protection current transformer, zero sequence current transformer and zero sequence voltage sensor with unified parameters. It has the characteristics of wide measuring range, high measuring accuracy and high reliability. With the combination of primary and secondary fusion controller, it can quickly and accurately determine various line faults.
| Item | Units | Value | |
| rated voltage | kV | 12 | |
| rated frequency | Hz | 50 | |
| rated current | A | 630 | |
| rated short circuit breaking current | kA | 20 | |
| rated short time withstand current and duration | kA/s | 20/4; 25/4; 31.5/4 | |
| rated short time withstand current | kA | 20 | |
| rated peak withstand current | 50 | ||
| rated cable charging current | A | 25 | |
| rated operation sequence | 0-0.3s-Co-180s-Co | ||
| rated working pressure (gauge pressure when 20ºC) | MPa | 0.35 | |
| rated minimum functional pressure (gauge pressure when 20ºC) | 0.25 | ||
| 1 min power frequency withstand voltage (under the minimum pressure) | interphase/ to ground | kV | 42 |
| break | 48 | ||
| rated lightning impulse withstand voltage | interphase/ to ground | 75 | |
| break | 85 | ||
Wooden case or as you request.
Shenheng Power Equipment CO., LTD is a company specializing in the production of high and low voltage switch power transmission and distribution equipment and high, low voltage electrical components, one of the professional production enterprises, the production of all fully insulated and fully sealed inflatable cabinet, intelligent solid insulation ring main unit, outdoor high voltage cable branch box, box-type substation, etc. Product quality is stable, reliable, It is deeply trusted and approved by the customers.
Manufacturing of the main products are YBW box-type substation, KYN61-40.5, KYN28A - 24, KYN28A - 12, XGN2-10, HXGN-10 high voltage switchgear, XGN ring net cabinet, SHSRM inflatable ring main unit, SHSG solid ring main unit, MNS, GCS, GCS, GGD, XL low voltage switchgear , vacuum circuit breaker , oil immersed transformer , dry type transformer , current /potential transformer ,load break switch and other transmission and distribution equipment.
For a long time also for all kinds of metallurgy, shipbuilding, electric power, mining, and intelligent buildings, high-rise buildings, hospitals, schools and other industries to provide high quality power transmission and distribution of complete sets of equipment and electrical control equipment. The company has a strong technical force, sophisticated technology and sophisticated testing methods, and the products sell well across the country.
Suppliers with verified business licenses
Audited Supplier 
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