FN18(NAL)-24D 24KV LBS load break switch indoor air

Product Description

FN18(NAL) series Load break switch, the air insulated type switch disconnectors (Load Break Switches) of FN18(NAL) and NALF areintended for indoor installation in air-insulated switchgear systems.

FN18-DR is a general purpose, three-pole, load break switch that offers switchgear owners and assemblers the advantages of an advanced interrupting technology and proven, dependable performance in a compact design. The switch is available to switchgear assemblers as a building block for metal-enclosed and pad-mounted switchgear applications in ratings from 12-40.5 kV. The standard FN18 switch includes a heavy-duty steel frame with stand-off insulators, a unique puffer-type arc extinguishing system, an operating mechanism and current-carrying components, including blade-type interrupters with cast hinges and jaw connectors. Optional accessories and features include a variety of operating handles, a motor operator, auxiliary switches, a shunt trip device, fuse bases, mechanical fuse tripping, grounding switches, mechanical door interlocking and key interlocking.

Introduction

The LBS type NAL/NALF is based on a modular principle. The basic unit consists of a framewith insulators and current carrying parts. Two different types of operating mechanisms.snap action mechanism type K or stored spring energy mechanism type A, can be mounted onthe frame. Fuse bases type F, with or without fuse tripping mechanism, and an earthing switchtype E/EB, suitable for both direct mounting and free standing components, complete thebasic equipment of a switch disconnector. These modules can be easily configured accordingto customer expectations. Accessories, such as shunt trip, under-voltage release, auxiliaryswitches, motor operation and various systems for manual operation can easily be added.

Product features

A NAL Load Break Switch (which interrupts load currents up to 1,250 A) and a small fault-current circuit combined with a fuse base (F) and current limiting fuses (which break largeshort-circuit currents) create a NALF-type Load Break Switch that provides protection againstamajority of fault types in a modern electric network.
Operating conditions

Ambient temperature:

Maximum +40ºC Maximum 24 hour average +35ºC
Minimum (according to “minus 5 indoorclass”)-15ºC·
Humidity: Daily average ambient air relative humidity ≤ 95%, on average ≤ 90%;
Saturated vapor pressure of daily mean values s 2.2 x 10-3Mpa, on averages 1.8 x10- 3Mpa;
Maximum site altitude:≤ 1000 M above sea level,

FN18 （NAL/NALF）

Product size