Tag:switch=circuit_breaker
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 switch = circuit_breaker
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| Description |
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A circuit-breaker is the only kind of power switch which offers enough protection (safety) against abnormal power currents and can be operated when bound circuit is loaded. 
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| Group: power |
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| Useful combination |
Status: approved
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A circuit-breaker on Wikipedia (441-14-20) is a kind of power=switch. This device is capable to break both normal or abnormal power currents but can't offer an enough protection to high voltages when open. A circuit breaker can often be found in power=substations and is often associated with a disconnector or earthing switch which brings this protection in open state.
How to map
Mapping guidelines don't divert from power=switch. Go there for more information.
Examples
| Photo | Aerial view | Tagging | Note |
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3822480206  3822480206
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 Have a look : 69813552  69813552
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Both coupling and bay circuit breakers have the same tagging. Even if two chambers can be seen on aerial picture, please use only one |
400 kV busbar coupling dual circuit-breaker. Such devices actually use SF6 as insulation gas. |
 3822480160 3822480160
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400 kV dual circuit-breaker protecting a power bay (where power lines connect to substations). Such devices actually use SF6 as insulation gas. | ||
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A dual switches association in distribution substation. The circuit-breaker is on the transmission side and assume the power grid protection. It has to be operated prior to the disconnector since the power line is surely loaded. The disconnector switches are operated by the distribution operator in maintenance operations when the substation needs to be forced offline. |
See also
- Proposed features/Power switching extension, approved proposal.