The 11KV Indoor Sf6 Load Break Switch manufactured by Wzonpa factory is engineered for indoor electrical distribution systems where space efficiency and operational stability are required. It is widely applied in ring main units, compact substations, and cable distribution panels.
SF6 gas sealed insulation system for stable dielectric strength
Three-position operation: closed, open, and grounded
Compact design suitable for confined installation spaces
Supports integration with fuse protection units (BRFLN36-12D type)
The 11KV Indoor Sf6 Load Break Switch ensures controlled switching of load current, cable charging current, and transformer no-load current in medium-voltage networks.
Hermetically sealed SF6 chamber ensures stable arc quenching performance
APG epoxy resin insulation structure improves dust and environmental resistance
Mechanical interlock system enhances operational safety
Pressure relief design for internal fault protection
Maintenance-free operation under rated conditions
The 11KV Indoor Sf6 Load Break Switch combines isolation and grounding into one system, reducing operational complexity in distribution control.
The 11KV Indoor Sf6 Load Break Switch is widely used in:
Ring main units (RMU)
Urban power grid renovation projects
Industrial distribution systems
Commercial buildings and infrastructure substations
Transformer and cable protection systems
Its adaptability makes the 11KV Indoor Sf6 Load Break Switch suitable for both new installations and system upgrades.
Manufactured under strict quality control systems, each 11KV Indoor Sf6 Load Break Switch complies with IEC 60265-1 standards.
Full factory testing for dielectric and mechanical performance
Pressure and sealing verification before shipment
Stable operation under -35°C to +40°C environments
Designed for altitudes up to 2500m
Compared with conventional air-insulated switches, the 11KV Indoor Sf6 Load Break Switch for sale offers:
Higher insulation reliability in compact space
Stronger arc extinguishing capability
Reduced maintenance requirements
Longer service life in harsh environments
Wzonpa provides technical guidance, customization options, and after-sales support to ensure stable integration of the 11KV Indoor Sf6 Load Break Switch into different power distribution systems.
| Ratings | Unit | Value | ||
| Rated voltage | kV | 12 | 24 | 40.5 |
| Rated lighting impulse withstand voltage | kV | 75 | 125 | 170 |
| Common value | ||||
| Across the isolating distance | kV | 85 | 145 | 195 |
| Rated short duration power frequency withstand voltage | kV | 28 | 50 | 70 |
| Common value | ||||
| Across the isolating distance | kV | 32 | 60 | 80 |
| Rated frequency | Hz | 50/60 | 50/60 | 50/60 |
| Rated current Ir | A | 630 | 630 | 630 |
| Rated short time withstand current | kA | 25 | 20 | 20 |
| Rated duration of short circuit | S | 2 | 3 | 3 |
| Rated peak withstand current | kA | 62.5 | 50 | 50 |
| Pole Distance | mm | 200,210 | 210,250,275 | 350 |
| Making and breaking tests(IEC 60265-1)for FLN36 switch | ||||
| Mainly active load current | A | 630 | 630 | 630 |
| Chosed-loop distribution circuit current | A | 630 | 630 | 630 |
| Cable charging current | A | 50 and 10 | 50 and 10 | 50 and 10 |
| Line charging current | A | 20 | 20 | 20 |
| Cable and line charging current under earth faults | A | 87 | 87 | 87 |
| Short circuit making current | kA | 62.5 | 50 | 50 |
| Making and breaking tests(IEC 60420)for FRLN36 switch-fuse combination | ||||
| Withstand and switch on the cut-off current of the fuse | kA | 25 | 20 | 20 |
| Breaking test with Ing preacing time of fuse | OK | OK | OK | |
| Breaking capacity at rated transfer current | A | 1530 | 920 | 630 |
| Mechanical performance | ||||
| Mechanical endurance of switch close/open | Ns | 1000 | ||
| Mechanical endurance of switch open/earth | Ns | 1000 | ||
| Ambient temperature | ||||
| Maximum value | ℃ | 55 | ||
| Maximum value of 24h mean | ℃ | 55 | ||
| Minimum value | ℃ | -15 | ||
| Altitude above sea level | m | ≤1800 | ||
Q1: What is the function of the 11KV Indoor Sf6 Load Break Switch?
A1: It is used to switch, isolate, and ground medium-voltage circuits safely in distribution systems up to 12kV.
Q2: Can the 11KV Indoor Sf6 Load Break Switch work with fuses?
A2: Yes, it can be combined with fuse units to provide short-circuit and overload protection for transformers and cables.
Q3: What insulation medium is used?
A3: SF6 gas is used as both insulating and arc-extinguishing medium in a sealed chamber.
Q4: Where is it commonly installed?
A4: It is commonly installed in RMUs, substations, cable branch boxes, and compact switchgear panels.
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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