Circuit-breaker: Difference between revisions
From Electrical Installation Guide
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| bgcolor="#0099cc" | The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist | |||
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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. | |||
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| bgcolor="#0099cc" | '''Functions''' | |||
| bgcolor="#0099cc" | | |||
| bgcolor="#0099cc" | '''Possible Conditions''' | |||
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| Isolation | |||
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* | |||
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| Control | |||
| Functional | |||
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* | |||
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| Emergency switching | |||
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*(With the possibility of a tripping coil for remote control) | |||
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| Switching-off for mechanical maintenance | |||
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* | |||
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| Protection | |||
| Overload | |||
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* | |||
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| Short-circuit | |||
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* | |||
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| Insulation fault | |||
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*(With differential-current relay) | |||
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| Undervoltage | |||
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*(With undervoltage-trip coil) | |||
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| Remote control | |||
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* Added or incorporated | |||
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| Indication and measurement | |||
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*(Generally optional with an electronic tripping device) | |||
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'''''Fig. H23:''' Functions performed by a circuit-breaker/disconnector'' | |||
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* [[Coordination between circuit-breakers]] | * [[Coordination between circuit-breakers]] | ||
* [[Discrimination MV/LV in a consumer’s substation]] | * [[Discrimination MV/LV in a consumer’s substation]] | ||
* [[Circuit-breakers suitable for IT systems]] | |||
* [[Ultra-rapid circuit breaker]] | * [[Ultra-rapid circuit breaker]] | ||
|} | |} | ||
[[ru:Автоматический выключатель]] | |||
<br>[[ru:Автоматический выключатель]] | |||
[[zh:断路器]] | [[zh:断路器]] | ||
Revision as of 11:19, 20 August 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
