Load Switches

FLN36 SF6 Load Switch & Fuse Combination

Indoor SF6 load switch family (FLN36 / FLRN36, 12 & 24 kV) with Close-Open-Earth three-position interrupter, visible pressure gauge, safety diaphragm and optional touch-safe cable heads — to GB 3804 / GB 16926 / IEC 60265 / 60420.

Factory-direct supply Worldwide delivery & export documentation 12-month warranty · extended options

Switch and combination share the same epoxy-injected upper/lower housings forming the gas cavity; the common r
Front panel carries the SF6 gauge and a position indicator directly coupled to the contact shaft; a rear safet
Reliable mechanical interlocks: load switch ↔ earthing switch, earthing switch ↔ front door (for cabinet build
TII manual spring mechanism: upper hole earths, lower hole switches; closing charges the opening spring, relea
TII electric version adds motor charging and shunt-trip coil — manual and electric fully independent; AC220 /

At a glance

Built to perform, year after year

12(24) kV

Rated voltage

50Hz

Rated frequency

630 / 125A

Rated current (switch / fuse unit)

20 kA / 3 s

Load-switch short-time withstand

A closer look

Engineered around safety, efficiency and uptime

Overview

FLN36-12(24)D and FLRN36-12(24)D indoor AC HV SF6 load switches, switch-fuse combinations and cable-head-mountable variants were self-developed by absorbing advanced foreign technology against Chinese operating requirements, fully type-tested to GB 3804, GB 16926, IEC 60265 and IEC 60420. The three-position Close-Open-Earth interrupter offers reliable interlocking, high break insulation and large creepage; outlets carry voltage-equalising shields, and the cable-head variant fits touch-safe front connectors for cable distribution boxes. Special dynamic/static seals plus a visible SF6 pressure gauge keep operation safe — a new-generation switch for urban grids, serving 10/20 kV systems in industry, high-rises, residences and prefabricated substations.

Structure & mechanisms

Switch and combination share the same epoxy-injected upper/lower housings forming the gas cavity; the common rotating contact cycles Close-Open-Earth
Front panel carries the SF6 gauge and a position indicator directly coupled to the contact shaft; a rear safety diaphragm vents over-pressure to protect personnel
Reliable mechanical interlocks: load switch ↔ earthing switch, earthing switch ↔ front door (for cabinet builds)
TII manual spring mechanism: upper hole earths, lower hole switches; closing charges the opening spring, released only by button or fuse strike
TII electric version adds motor charging and shunt-trip coil — manual and electric fully independent; AC220 / DC220 / DC110 / DC48 V

Service conditions

Ambient −15 °C … +40 °C; altitude ≤ 1000 m (negotiate higher per GB/T 11022)
Daily RH ≤ 95 %, monthly ≤ 90 %; vapour pressure ≤ 2.2 / 1.8 kPa
Air free of dust, smoke, corrosive or flammable gas and salt mist; external vibration negligible; induced EMI in secondary ≤ 1.6 kV

Technical specifications

Full specifications

Main parameters (FLN36 / FLRN36)

Rated voltage

12(24) kV

Rated frequency

50 Hz

Rated current (switch / fuse unit)

630 / 125 A

Load-switch short-time withstand

20 kA / 3 s

Operating mechanism voltage

AC220 · DC220/110/48 V

Specifications are representative and may vary by configuration and region. Final figures are confirmed on the project datasheet.

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