Circuit-breaker: Difference between revisions
From Electrical Installation Guide
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The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist | |||
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* [[Standards and description of circuit-breakers]] | * [[Standards and description of circuit-breakers]] | ||
* [[Fundamental characteristics of a circuit-breaker]] | * [[Fundamental characteristics of a circuit-breaker]] | ||
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* [[Circuit-breakers suitable for IT systems]] | * [[Circuit-breakers suitable for IT systems]] | ||
* [[Ultra-rapid circuit breaker]] | * [[Ultra-rapid circuit breaker]] | ||
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Revision as of 13:10, 15 November 2013
The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist
As shown in Figure H23 the circuit-breaker/ disconnector is the only item of switchgear capable of simultaneously satisfying all the basic functions necessary in an electrical installation.
Moreover, it can, by means of auxiliary units, provide a wide range of other functions, for example: indication (on-off - tripped on fault); undervoltage tripping; remote control… etc. These features make a circuit-breaker/ disconnector the basic unit of switchgear for any electrical installation.
| Functions | Possible Conditions | |
|---|---|---|
| Isolation |
| |
| Control | Functional |
|
| Emergency switching |
| |
| Switching-off for mechanical maintenance |
| |
| Protection | Overload |
|
| Short-circuit |
| |
| Insulation fault |
| |
| Undervoltage |
| |
| Remote control |
| |
| Indication and measurement |
|
Fig. H23: Functions performed by a circuit-breaker/disconnector
