User Manual

User’s Guide — 51
Starter Size
What NEMA size starter is required for
a 575 volt, 3Ø, 20 HP induction motor?
Steps Keystrokes Display
Reset calculator [On/C] 0.
Enter volts 575 [Volts] 575. VOLT
Enter hp 20 [HPmotor] 20. HP IND
Solve for
starter size [Set] [HPmotor] 2
STAR SIZE
Overload Protection Size
What overload protection device size is
required for a 460 volt, 3-phase, 15 HP
induction motor with a nameplate cur-
rent rating of 19.2 amps and a 1.0 ser-
vice factor? What is the required over-
load rating at 125% (for a 1.15 service
factor)?
Steps Keystrokes Display
Reset Calculator [On/C] 0.
Enter volts 460 [Volts] 460. VOLT
Enter horsepower 15 [HPmotor] 15. HP IND
Enter nameplate
current 19.2 [Amps] 19.2 AMPS
Find overload size [O-Load] 22.08 ol AMPS
Display % used [O-Load] 115. %FLC
Find 125% load 125 [O-Load] 24.
ol AMPS
Display % used [O-Load] 125 %FLC
5060-UG-B-Composite 4/4/03 12:37 PM Page 53