FN7-12 Indoor load switch (load break switch), disconnector-fuse combination is designed by our company
Summary
FN7-12DR is used for three-phase AC 50Hz 12KV power systems. They used for breaking load current and controlling short-circuit current.
FN7(C)-12 type H.V load switch-fuse combination is basied on the FN7-12 series H.V load switch, then put the operating mechanism on the side, as customer order.
Normal Serviec Condition
1,The altitude does not exceed 1000m.2,The ambient air temperatrue : Max:+40. Min:-25.3,The relatire humidity of air Daily average ≤95% . Monthly average ≤90%4,The ambient air should not be obviously polluted by corrosivity or the flammability gas steam.Etc.5,The working situation without frequent violent.
Technical Information
Rated voltage (kV) | Max.voltage (kV) | Rated current (A) | 1min power frequency withstand voltage (kV) | 4S heat-stabling current(value) (kA) | Machine stabling current(peak) (kA) | Short-circuit controlling current (kA) | Rated switch-off current (A) | Rated transfer current (A) |
12 | 12 | 400 | 42/48 | 12.5 | 31.5 | 31.5 | 400 | 1000 |
630 | 42/48 | 20 | 50 | 50 | 630 | 1000 |
Rated parameter of fuse box
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Load break switch,disconnector
