Circuit-breaker: Difference between revisions
From Electrical Installation Guide
m (1 revision imported: Migrated pages - Tables) |
m (Text replacement - "\[\[ru:[^]]*\]\][ \r\n]*" to "") |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
{{Menu_LV_switchgear_functions_and_selection}} | {{Menu_LV_switchgear_functions_and_selection}} | ||
{{Highlightbox| | {{Highlightbox| | ||
The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist}} | The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist}} | ||
| Line 58: | Line 57: | ||
{{Section-TOC}} | {{Section-TOC}} | ||
Latest revision as of 09:48, 22 June 2022
The circuit-breaker/disconnector fulfills all of the basic switchgear functions, while, by means of accessories, numerous other possibilities exist
As shown in Figure H20 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.
Fig. H20 – Functions performed by a circuit-breaker/disconnector
| Functions | Possible Conditions | ||
|---|---|---|---|
| Isolation | ☑ | ||
| Control | Functional | ☑ | |
| Emergency switching | ☐ | (With the possibility of a tripping coil for remote control) | |
| Switching-off for mechanical maintenance | ☑ | ||
| Protection | Overload | ☑ | |
| Short-circuit | ☑ | ||
| Insulation fault | ☐ | (With differential-current relay) | |
| Undervoltage | ☐ | (With undervoltage-trip coil) | |
| Remote control | ☐ | Added or incorporated | |
| Indication and measurement | ☐ | (Generally optional with an electronic tripping device) | |
