Watlow Power Series Rev H - Manual (Page 11)

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
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Current (amps) into a Resistive Load
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3-Phase, 3-Leg and 3-Zone Multizone
Fan Cooled at 100% On
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Current (amps) into a Resistive Load
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3-Phase, 2-Leg and 2-Zone Multizone
Fan Cooled at 100% On
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Current (amps) into a Resistive Load
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Single-Phase Fan Cooled at 100% On
F20
F30 F25
F35
F20 F30 F25 F35
F20 F30 F25