FLN36‑40.5D 40.5KV Indoor SF6 LBS

Reliable electrical equipment, transformers, switchgear and complete power distribution assemblies for industrial projects.

FLN36‑40.5D 40.5KV Indoor SF6 LBS

FLN36‑40.5D 40.5KV Indoor SF6 LBS

The FLN36‑40.5D indoor AC high‑voltage SF₆ load break switches, load‑switch‑fuse combination units and cable‑end‑mountable load break switches are independently developed by our company, based on imported advanced technologies and adapted to Chinese grid operating conditions. The product has completed full type‑tests and meets GB3804, GB16926, IEC 60265 and IEC 60420 standards. It adopts a make‑break‑earthing three‑position interrupter with reliable interlocking, high contact‑gap insulation and long creepage‑distance design. Outgoing terminals are equipped with grading‑shield covers. The cable‑end‑mountable version is fitted with touch‑safe cable front connectors for high‑voltage cables, suitable for cable distribution boxes. Optimized dynamic and static sealing ensures reliable gas tightness. A prominently‑mounted pressure gauge enables real‑time operational monitoring for safe service. It is new‑generation high‑voltage switchgear for urban power networks. Designed for 3‑phase AC 50 Hz power systems (35 kV), it serves industrial‑mining sites, high‑rises, residential zones, switching substations, shopping malls, airports, metros and hospitals. It makes‑breaks load and fault currents for control and protection of power lines and distribution transformers. Should you require further details, please feel free to contact us. Our technical team is ready to work out tailored solutions for you.

Operating Conditions

Ambient air temperature: −25 °C ~ +40 °C

Altitude: Not exceeding 2 000 m

Humidity conditions:

  • Daily average relative humidity: ≤ 95 %
  • Monthly average relative humidity: ≤ 90 %
  • Daily average water‑vapour pressure: ≤ 2.2 kPa
  • Monthly average water‑vapour pressure: ≤ 1.8 kPa

The surrounding air shall not be significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt mist.

Vibrations and seismic shocks originating from outside the switchgear and controlgear shall be negligible.

The amplitude of electromagnetic interference induced in secondary circuits shall not exceed 1.6 kV.


Detailed parameters

Item Unit Parameters
FLN36‑40.5D FLRN36‑40.5D
Rated Voltage KV 35 35
Rated Frequency Hz 50 50
Rated Current A 630 125
Load‑break Switch Rated Short‑time Withstand Current / Rated Short‑circuit Duration KA/S 20/3  
Earthing Switch Rated Short‑time Withstand Current / Rated Short‑circuit Duration KA/S 20/2  
Rated Peak Withstand Current & Rated Short‑circuit Making Current KA 50 125(Expected)
Active‑load Breaking Current A 630  
Closed‑loop Breaking Current A 630  
5% Rated Active‑load Breaking Current A 31.5  
Cable‑charging Breaking Current A 10  
Breaking Capacity for No‑load Transformer KVA 125 1250
Breaking Transfer Current A   1700
Prospective Short‑circuit Breaking Current KA   50
1‑min Power‑frequency Withstand Voltagephase‑to‑phase / phase‑to‑earth / across open contacts KV 42/48 42/48
Lightning Impulse Withstand Voltagephase‑to‑phase / phase‑to‑earth / across open contacts KV 75/85 75/85
Mechanical Endurance: Main‑circuit / Earthing‑circuit OPS 3000/2000 200/2000
SF₆ Rated Gas Pressure (gauge pressure 20 °C) MPa 0.04~0.05 0.04~0.05

 

Outline Dimension Drawing


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