Circuit-breaker: Difference between revisions
From Electrical Installation Guide
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As shown in | As shown in {{FigureRef|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. | 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. | ||
{| class="wikitable | {| class="wikitable" | ||
|- | |- | ||
! Functions | ! Functions | ||
! | ! | ||
! Possible Conditions | ! Possible Conditions | ||
|- | |- | ||
| Isolation | | Isolation | ||
| | | | ||
| | | | ||
* | * | ||
| Line 29: | Line 29: | ||
|- | |- | ||
|- | |- | ||
| | | | ||
| Emergency switching | | Emergency switching | ||
| | | | ||
| Line 35: | Line 35: | ||
|- | |- | ||
|- | |- | ||
| | | | ||
| Switching-off for mechanical maintenance | | Switching-off for mechanical maintenance | ||
| | | | ||
| Line 47: | Line 47: | ||
|- | |- | ||
|- | |- | ||
| | | | ||
| Short-circuit | | Short-circuit | ||
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| Line 53: | Line 53: | ||
|- | |- | ||
|- | |- | ||
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| Insulation fault | | Insulation fault | ||
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| Line 59: | Line 59: | ||
|- | |- | ||
|- | |- | ||
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| Undervoltage | | Undervoltage | ||
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| Line 66: | Line 66: | ||
|- | |- | ||
| Remote control | | Remote control | ||
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* Added or incorporated | * Added or incorporated | ||
| Line 72: | Line 72: | ||
|- | |- | ||
| Indication and measurement | | Indication and measurement | ||
| | | | ||
| | | | ||
*(Generally optional with an electronic tripping device) | *(Generally optional with an electronic tripping device) | ||
Revision as of 13:40, 30 November 2016
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
