Overview

The load switch is a kind of switchgear with a simple arc extinguishing device. It uses SF6 gas as the insulation and arc extinguishing medium. It can be used as the closing and breaking load current and overload current. It can also be used as the closing and breaking no-load. Lines, no-load transformers and capacitor banks, etc., all three-position load switches with on, off and grounding functions are simple in structure and affordable. In addition to long life, strong breaking force and other advantages of vacuum load switch, its outstanding advantages are easy to achieve three working positions (on, off and ground), small current (inductance, capacitance) breaking, anti- Strong environmental conditions. It is suitable for promotion and application in urban and rural medium voltage distribution networks. SF6 load switch + fuse combination is the SF6 load switch to bear the overload current (this overload current is still within the range of the load switch rated breaking current for the SF6 load switch) and the normal operating current of the closing and breaking, It is also required to bear the breaking of the “transfer current”. The short-circuit protection and overload protection on the high-voltage side of the transformer are borne by the high-voltage current-limiting fuse. At this time, a group of SF6 load switches and three fuses with triggers, as long as any one of the triggers is actuated, the linkage mechanism will automatically open the three phases of the load switch at the same time. The combination of the two can meet the requirements of the operation and protection of various normal and faulty distribution systems.

FLN36-24kV load breaker switch use SF6 gas as arc extinguishing and insulating medium. There are three work stations: opening, closing and grounding in the witch. It has small volume, installing easy to us, strong environment adaptability and other characteristics.

FLN36-24 load break switch and FLRN36 -24D load break switch plus fuse combination can be used to protect and control the electric equipment for power supply and transformer substations, which is especially suitable for RMU, cable branch cabinet and distribution switching substation.

Ambient condition

1.Ambient temperature: -40°C ~+40°C
2.Relative humidity: Daily average ≤ 95% Monthly average ≤ 90%
3.Altitude: ≤ 2000m
4.Earthquake intensity: ≤ 8 degree
5.No corrosive gas, no combustible gas, no steam and shake.
*Annual leakage rate ≤ 0.1%
*Special conditions: When the altitude > 2000m, please indicate in order to adjust the designing scheme.

Features

FL(R) N36-12 medium voltage load switch had reinforced epoxy resin cast, which uses SF6 gas for insulation and also arc quenching medium. The gas pressure is 0.045Mpa.
Three position rotatable moving contacts for close, open and earthed operation.
The resin cast has anti-explosion pressure relief value fitted at back for ensuring safety of operators.
FLN36-12/T630-20 has single K-type spring mechanisms, normally used for incoming and outgoing line.
FLN35-12D/T125-50 has double A-type spring mechanisms, normally used together with fuse for transformer protection.
Build-in capacitive sensors
Optional motor operation
Operation GAS pressure meter or testing points

Selection Table for SF6 Load Break Switch