Sevcon Gen4, Applications Reference Manual, Page: 48 / 123

Doc. # 177/52701
Rev3
4-4
Output ratings
Input
(Vdc) Function Short term
rating* (A rms) Continuous
rating** (A rms)
24 Single traction size 2 300 120
24/36 Single traction size 4 450 180
Single traction size 6 650 260
36/48
Single traction size 2 275 110
Single traction size 4 450 180
Single traction size 6 650 260
72/80
Single traction size 2 180 75
Single traction size 4 350 140
Single traction size 6 550 210
96/110
Single traction size 4 300 120
*2 minute rating (lower ratings are possible for longer periods; see example in Figure 10)
** 1 hour minimum without forced-air cooling
Size 2 long-term rating achievable with finned heatsink approx 250mm x 180mm, 0.5°C/W
Size 4 long-term rating achievable with finned heatsink approx 330mm x 200mm, 0.3°C/W
Size 6 long-term rating achievable with finned heatsink approx 330mm x 280mm, 0.2°C/W
Figure 10 Output current available for various durations of sustained current
demand