| Customization: | Available |
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| Type: | High-voltage |
| Structure: | Load Break Switch |
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FKN12-12 indoor high-voltage compressed gas load switch (hereinafter referred to as FKN12-12 load switch) is a three-phase high-voltage switchgear with a rated voltage of 12kV and a rated frequency of 50Hz, which is used to separate load current, closed-loop current, no-load transformer and current charging current, and close short-circuit current. A load switch equipped with a grounding switch can withstand short-circuit currents.
FKRN12-12 indoor high-voltage load switch fuse combination electrical appliance (hereinafter referred to as FKRN12-12 combination electrical appliance) is an indoor switchgear combined with FKN12-12 load switch and S LAJ-12 (XRNT -10) high-voltage current limiting fuse.
It can reliably cut off any current up to the short-circuit current; The load switch breaks the current, the fuse breaks the short-circuit current,and the joint interrupts any current between the working current and the full short-circuit current, while the fuse opens the load switch through its impactor.
| project | unit | FKN12-12 | FKRN12-12 |
| Rated voltage | kV | 12 | |
| Rated frequency | Hz | 50 | |
| Rated current | A | 630 | 100 |
| Lightning impulse withstand voltage | kV | To ground and phase 75,isolation 85 | |
| 1min power frequency withstand voltage | kV | To ground and phase 42,isolation 48 | |
| Rated thermally stable current | kA | 20(4S) | |
| Rated dynamic stability current | kA | 50 | |
| Rated closing current(peak) | kA | 50 | 50 |
| Rated short-circuit breaking current(given value) | kA | 31.5 | |
| Maximum 12.tMax at critical breaking current | A2S | By dissolver characteristic curve | |
| Minimum breaking current | kA | Press the fuse characteristic curve | |
| Rated transfer current | kA | 1.5 | |
| Maximum breaking current(reference) | kA | 1.8 | |
| Open no-load transformer capacity | kVA | 1250 | |
| Rated cable charging current | A | 10 | |
| Rated number of active load current cuts | times | >100 | |
| The impactor touches the load switch opening time | S | >0.06 | |
| The grounding switch thermally stabilizes the current | kA | 20(2S) | |
| Grounding switch thermally stable current(peak) | kA | 50 | |
| The motor operates the supply voltage | V | AC DC 110,220 | |
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