Description
FLN36-12D(24D) sulfur hexafluoride Load Break Switch(LBS) is applied to indoor medium voltage switchgear of RMU, using SF6 gas as arc extinguishing and insulating medium.There are three working positions:open, closed, earth position in the switch, which is suitable for three phase AC 10Kv and 20Kv 50HZ power system, for cutting off and turning off load current and fault current.
It can be divided into two types: FLN36-12D ( K type single spring operating mechanism ),FLRN 36-12D (A type double spring operating mechanism). The second type could be equipped with fuse combination, having control and protecting function, which can be used for power supply and substation as a protecting and control device, especially suitable for ring main unit, cable distribution box and switching substation
This LBS is complied with the standards of IEC60265-1-1998, IEC60420
Environment Condition
Ambient temperature:-35℃~+40℃
Altitude: ≤2500m
Daily average relative humidity: ≤95%
Monthly average relative humidity: ≤90%
Earthquake intensity: ≤8 degree
No fire, explosion, severe vibration, chemical corrosion and serious pollution
Technical Data
| NO. | Description | Unit | Parameter | ||
| FLN36-12D(24D) | |||||
| 1 | Rated voltage | kV | 12(24) | ||
| 2 | Rated Current | kV | 630(630) | ||
| 3 | Rated insulation level | 1min P.F. withstand voltage (Phase to phase/earth, between gaps) | kV | 42/48(65/79) | |
| Lighting impulse withstand voltage (Phase to phase/earth, between gaps) | kV | 75/85(125/145) | |||
| 4 | Rated short time withstand current | kA | 20(20) | ||
| 5 | Rated duration of short circuit | s | 2(2) | ||
| 6 | Rated short-circuit closing current (peak) | kA | 50(50) | ||
| 7 | Rated peak withstand current | kA | |||
| 8 | Rated breaking current | Active load breaking current | A | 630(630) | |
| Closed loop breaking current | A | 630(630) | |||
| 5% rated active load breaking current | A | 31.5(31.5) | |||
| Breaking cable charging current | A | 10(10) | |||
| Breaking non-load transformer capacity | kVA | 1250(2000) | |||
| 9 | Mechanical life | Times | 5000(5000) | ||
| 10 | Rated pressure of SF6(20℃, gauge pressure) | MPa | 0.04-0.05(0.04-0.05) | ||
Outline & Mounting Dimensions
