ABB REG316 4 Series - Page 263

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-225
HEST 905 035 C
0 t
1,0
1,5
i
i = i
n
t [min]
60 80
20
40
60
20 40 120 1400
100
120
80
100
140
160
J
nw
J
Oil
J
Oil
J w
t
Oil
t
w
DJ
Oil
J
w
J
Oil
J [°C]
J w t() =¥
J
Öl
t() =¥
DJ
Oil
= 50°C
t = 120 min
Oil
J
nw
= 100°C
J
Oil
= 90°C
DJ
nw
= 60°C
t
w
= 10 min
Fig. 3.5.23.1 Temperature rise of a transformer winding