3KC3 and 3KC6 transfer switching equipment3KC3 and 3KC6 transfer switching equipment
Temperature
-
At a temperature of -20 °C to +40 °C without derating
-
The derating values for 3KC3 and 3KC6 transfer switching equipment at higher temperatures are given in the table below:
Rated current
40 A
63 A
80 A
100 A
125 A
160 A
Frequency
50/60 Hz
50/60 Hz
50/60 Hz
50/60 Hz
50/60 Hz
50/60 Hz
Thermal current Ith at 40 °C
40
63
80
100
125
160
Thermal current Ith at 50 °C
40
63
80
100
1101)
125
Thermal current Ith at 60 °C
40
50
63
80
1001)
125
Thermal current Ith at 70 °C
40
40
50
63
801)
100
1) It is possible to reach 125 A using an increased cable cross-section (of 70 mm2 for stranded cable with accessory) and the bridging bar for 160 A (3KC9618-3).