0 About this Manual
0.8 Units of measurement
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com 9
0.8 Units of measurement
Every physical dimension included in this manual uses international metric
system units, otherwise known as SI (Système International d’Unités) units.
For the purpose of the equipment’s UL certification, some of these
dimensions are accompanied by their equivalents in imperial units.
Table 1: Unit conversion examples
Designation
US-American
designation
Imperial unit SI value Conversion value
Length inch 1 in (’’) 25.4 mm 0.0394
Power horsepower 1HP=1.014PS 0.7457 kW 1.341
Moment of torque pound-force inches 1 lbf in 0.113 Nm 8.851
Temperature
Fahrenheit 1°F (T
F
) -17.222 °C (T
C
) T
F
=T
C
×9/5+32
Rotational speed Revolutions per minute 1rpm 1min
-1
1
Weight pound 1lb 0.4536 kg 2.205
Flow rate cubic feed per minute 1cfm 1.698 m
3
/min 0.5889
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