ABB REG316 4 Series Operating Instructions Manual page 264

ABB Switzerland Ltd
t
140
120
130
J [°C] D J [%]
120
110
Overload
Temperature rise at rated
current
110
Thermal time constant setting
100 100
0
100
Fig. 3.5.23.2 Actual temperature rise of the winding compared
to the temperature rise of the thermal image
Typical settings:
IB-Setting
Theta-Beginn
Theta-Warn
Theta-Trip
3-226
REG 316*4 1MRB520049-Uen / Rev. F
J = 126.4°C
Winding temperature
Thermal image temperature
i = 1.2
DJ - DJ
nw
DJ
200 300
t [min]
to be calculated
100%
105%
110%
t = 10 min
= 10°C
n oil w
= 50°C t = 120 min
n oil
oil
t = 90 min
400
HEST 905 036 C
500