Outline
FN7-24(DR) indoor HV load break switch applies to electric system with 24kV rated voltage and three-phase AC 50/60Hz, for connecting and breaking load current and short circuit current.
Use Conditions
A. Altitude: ≤1000m.
B. Ambient temperature: -25℃~+40℃.
C. Relative humidity: daily average ≤95%, monthly average ≤90%.
D. No frequent serious vibration.
Main Parameters
NO. | Items | Unit | Value |
1 | rated voltage | kV | twenty four |
2 | rated frequency | Hz | 50 |
3 | rated current | A | 400, 630, 1250 |
4 | rated active load breaking current | A | 400, 630, 1250 |
5 | Rated closed loop breaking current | A | 400, 630, 1250 |
6 | 5% rated active load breaking current | A | 20, 31.5, 62.5 |
7 | rated cable charging breaking current | A | 10 |
8 | 1min power frequency withstand voltage: phase-to-phase, phase to earth/ fracture | kV | 50/60 |
9 | lightning impulse withstand voltage: phase-to-phase, phase to earth/ disconnecting fracture | kV | 125/145 |
10 | rated short time withstand current (thermal stability) | kA | 16, 20, 25 |
11 | rated short circuit duration | s | 1 |
12 | rated peak withstand current | kA | 40, 50, 63 |
13 | rated short circuit making current | kA | 40, 50, 63 |
14 | mechanical life | times | 2000 |
Overall Drawing
FN7-24D
FN7-24R