User`s manual

Power Series Output Rating Curves
Fan Cooled
All curves are at 100% on with 90°C rated load wire and line wire connected. Note that each
chart is slightly different on the amperage scale. The safe operating region is from 1 amp up
to the specific curve for the output amperage code selected. For example: F25 Single-Phase is
rated up to 200 amps at 50°C; F30 Single-Phase is rated for 250 amps at 50°C. See page 2.6
for Natural Convection Cooled output rating curves.
Watlow Power Series Installation I 2.5
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
60
55
50
45
40
35
30
25
Current (amps) into a Resistive Load
Enclosure Internal
Ambient Temperature in °C
3-Phase, 3-Leg and 3-Zone Multizone
Fan Cooled at 100% On
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
60
55
50
45
40
35
30
25
Current (amps) into a Resistive Load
Enclosure Internal
Ambient Temperature in °C
3-Phase, 2-Leg and 2-Zone Multizone
Fan Cooled at 100% On
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
60
55
50
45
40
35
30
25
Current (amps) into a Resistive Load
Enclosure Internal
Ambient Temperature in °C
Single-Phase Fan Cooled at 100% On
F20
F30F25
F35
F20
F30F25 F35
F20
F30
F25