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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.
Technical Information
Technical Specification |
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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. |
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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,: |
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|
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- To earth and between poles | kV | 42 | 65 |
- Across isolating distance | kV | 48 | 79 |
Impulse withstand voltage 1.2/50μ s: |
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- To earth and between poles | kV | 75 | 125 |
- Across isolating distance | kV | 85 | 145 |
Mechanism Endurance | cycles | 2000 | 2000 |
Overall and installation dimensions
National Advisory Hotline
+86 577 61666 016
Mailbox：wzxikai@wzxikai.com
Tel：+86 577 61666 016
Fax：+86 577 61666 010
Add：No.271, Weishiqi Road, Yueqing Economic Development Insuatrial Zone, Yueqing, Zhejiang.
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