FN18-24 24kV Indoor High Voltage Load Break Switch and Fuse Combination
24kV load break switch&fuse combination 400A, 630A, 1250A
Description
FN18-24 24kV Indoor High Voltage Load Break Switch and Fuse Combination
FN18-D 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.
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 specification Switch disconnector type FN18 | ||||||||
| Rated voltage | Un | kV | 12kV | 24kV | ||||
| Rated current | In | A | 400 | 630 | 1250 | 400 | 630 | 1250 |
| Max.rated rated current | I | A | 400 | 630 | 1250 | 400 | 630 | 1150 |
| Short circuit making capacity | Ima | kA peak | 67 | 67 | 67 | 50 | 50 | 50 |
| Peak withstand current | Idyn | kA peak | 82 | 82 | 82 | 82 | 82 | 82 |
| Short time current 1sec.
2sec. 3sec. |
Ith
“ “ |
kA eff
“ “ |
31.5
25 20 |
31.5
25 20 |
31.5
25 20 |
25
25 16 |
25
25 16 |
31.5
25 16 |
| Mainly active load breaking capacity
(test duty 4, IEC 60265-1 (IEC265)) |
I |
A |
400 |
630 |
1250 |
400 |
630 |
1250 |
| Mainly capacitive breaking capacity
(test duty 4, IEC60265-1 (IEC 265)) |
I |
A |
150 |
150 |
150 |
80 |
80 |
80 |
| Mainly inductive breaking capacity cosφ=0.15 | A | 16 | 16 | 16 | 16 | 16 | 16 | |
| Rated earth fault breaking capacity,
IEC 60265-1 (IEC 265) Earth fault breaking capacity Capacitive breaking capacity |
I I |
A A |
150 90 |
150 90 |
150 90 |
75 31.5 |
75 31.5 |
75 31.5 |
| Max. Breaking capacity in co-operation with fuses IEC 62271-105
(IEC 420 1990-11) |
A |
1600 |
1600 |
900 |
900 |
|||
| Max. Fuse size | In | A | 125 | 125 | 80 | 80 | ||
| Power frequency withstand voltage 50Hz
1 min.-to earth and between poles-across isolating distance |
kV kV |
42 45 |
55 70 |
|||||
| Impulse withstand voltage 1.2/50μs
-to earth and between poles -across isolating distance |
kV kV |
75 85 |
125 145 |
|||||
| Pole distance | P | mm | 150 and 170 | 235, 250 and 275 | ||||
| Max.operating torque at:
-closing K/A mech. -opening K/A mech. |
Nm Nm |
115-120 Nm K-mech. 120 Nm/A-mech. 3Nm |
||||||
| Operating angle on the shaft | degree | 130 | ||||||
| Opening time | ms | 40-60 | ||||||
