FN18 Series

High Voltage Indoor Load Break Switch

12kV 24kV

fn18

Description

FN18 Series

FN18 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 upto 24kV. 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.

Specifications

FN18 Series

Technical Specification

   

Rated voltage

kV

12

24

Rated current

A

630

630

Rated power frequency

Hz

50/60

50/60

Short circuit making capacity

kA Peak.

50

50

Peak withstand current

kA Peak.

50

50

Short time current

kA eff.

  

1Sec.

 

31.5

25

2Sec.

 

25

25

3Sec.

 

20

16

Max. breaking capacity in co-operation with fuses IEC 62271-105 (IEC 420 1990-11)

A

1600

900

Max. fuse current(XRNT Fuse)

A

200

200

Power frequency withstand voltage 50Hz 1 min,:

   

– To earth and between poles

kV

42

65

– Across isolating distance

kV

48

79

Impulse withstand voltage 1.2/50μ s:

   

– To earth and between poles

kV

75

125

– Across isolating distance

kV

85

145

Mechanism Endurance

cycles

2000

2000

 

Drawing

FN18 Series

Download