Wenzhou Shuowei Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of 12kv indoor loadbreak switch in China, also supports customized service. Welcome to wholesale bulk advanced 12kv indoor loadbreak switch in stock here from our factory. If you have any enquiry about quotation, please feel free to email us.
12kV Indoor FL(R)N36 Load Break Switch LBS SF6 Switch-Disconnector
Products Description
12kV Indoor SF6 Switch-Disconnector FL(R)N36 Load Break Switch (LBS) is a double-break rotary load switch using SF6 gas for insulation and arc extinguishing, designed for 12kV power distribution systems. Each unit is sealed with 0.4bar SF6 gas and can be installed vertically or horizontally. A common installation in ring main units involves a horizontal steel partition between the cable and busbar rooms for safety compliance.
Combining the FLN36-12 indoor high-voltage SF6 load switch with other electrical components enables control and protection functions, ideal for industrial and mining enterprises, civil power supply, and secondary substations. The FLRN36-12kV load switch-fuse combination is particularly suited for ring network power supply units due to its matching protection characteristics with transformers.
Products Parameters
| No. | Items | Unit | FLN05-12 | FLRN05-12 |
|---|---|---|---|---|
| 1 | Rated voltage | KV | 12 | 12 |
| 2 | Rated frequency | Hz | 50/60 | 50/60 |
| 3 | Rated current | A | 630 | 1250 |
| 4 | Rated insulation level | |||
| 1 min power frequency withstand voltage | ||||
| - phase-to-phase | KV | 42 | 42 | |
| - phase-to-earth | KV | 40 | 40 | |
| - fracture | KV | 75 | 75 | |
| Lightning impulse withstand voltage (peak) | ||||
| - phase-to-phase | KV | 75 | 75 | |
| - phase-to-earth | KV | 85 | 85 | |
| - fracture | KV | 85 | 85 | |
| 5 | Auxiliary circuit 1 min power frequency | V | 2000 | 2000 |
| 6 | Rated thermal stability current (duration 3s/2s) | |||
| - main switch | KA | 20 | 20 | |
| - earthing switch | KA | 20 | 20 | |
| 7 | Rated short-circuit making current | KA | 50 | 125 |
| 8 | Rated closed circuit breaking current | A | 630 | 630 |
| 9 | Rated active load breaking current | A | 630 | 630 |
| 10 | Rated cable charging breaking current | A | 10 | 10 |
| 12 | Rated transfer current | A | 1700 | 1700 |
| 13 | Expected short-circuit breaking current | KA | 50 | 50 |
| 14 | Mechanical life | times | 2000 | 2000 |
| 15 | SF6 gas rated inflation pressure (20°C gauge pressure) | MPa | 0.04 | 0.04 |
| 16 | SF6 gas highest pressure (20°C gauge pressure) | MPa | 0.045 | 0.045 |
| 17 | Annual air leakage rate | %/Y | 0.5 | 0.5 |
| 18 | Synchronicity of opening and closing | ms | ≤3 | ≤3 |
| 19 | circuit resistance | µΩ | ≤100 | ≤100 |
Fuse Rated Parameters
| No. | Rated Voltage (KV) | Fuse Rated Current (A) | Fuse Link Rated Current (A) | Rated Breaking Current (KA) |
|---|---|---|---|---|
| 1 | 12 | 40 | 6.3,10,16,20,25,31.5,40 | 40 |
| 2 | 12 | 100 | 50,63,80,100 | 40 |
| 3 | 12 | 125 | 125 | 50 |
Products Features
| Feature | Description |
|---|---|
| Three-Position Design | Double-break rotary contact enables closed/open/grounded states in one unit. |
| SF6 Insulation | Uses SF6 gas for arc extinguishing and insulation, with epoxy resin casing for enhanced dielectric strength. |
| Pressure Relief Safety | Internal arc faults trigger: 1. Casing rupture at designed weak points 2. Cabinet pressure valve activation → Directs overpressure airflow outside the cabinet. |
| Modular Flexibility | Switch + operating mechanism in detachable upper unit, allowing quick conversion to: - Load switch + fuse combo - Standalone load switch configuration. |
Products Operating Mechanism
The spring operating mechanism of the load switch and its combined electrical appliances is divided into two types: single spring and double spring. FLN36-12D load switch is equipped with a single spring operating mechanism and is mainly used for incoming and outgoing line control units. The FLRN36-12D load switch-fuse combination appliance is equipped with a double spring operating mechanism and is mainly used for transformer protection units.
Products Usage Environment
1. Ambient air temperature: upper limit +40℃, lower limit -15℃.
2. Environmental humidity: The daily average relative humidity is not greater than 95%, and the monthly average relative humidity is not greater than 90%.
3. Altitude: The maximum altitude of the equipment installation site is 2000m.
4. Earthquake: The earthquake intensity does not exceed 8 degrees.
5. The surrounding air should not be significantly polluted by corrosive flammable gases, water vapor, etc. There should be no frequent severe vibrations.
Products Packings
Products FAQ
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