8 —
e
lectri
c
alc
®
P
ro
(cont’d)
efficiency (eff %) —
Enters or calculates the
percent ratio between real power (Watts) and
Theoretical Horsepower. Default value is 100%.
Entered or calculated Efficiencies greater than
100% will result in an error.
Kilowatt–Hours to BtU (Kw-hr
►
Btu)
—
Calculates BTU (British Thermal Unit) based on
an entered Kilowatt-Hour value.
BtU to Kilowatt–Hours (Btu
►
Kw-hr) —
Calculates Kilowatt-Hours based on an entered
BTU (British Thermal Unit) value.
parallel resistance (par res) —
Calculates
total Resistance based on an entered series of
Parallel Resistor values.
Motor Keys
The
ElectriCalc Pro
can be used to determine motor Full-Load Current
(Amps) based on entries for Motor Horsepower (HPmotor), Phase
and Voltage. You can also find an equivalent Motor Horsepower if you
have entered Voltage and Full-Load Current values. Only HP Motor
and Voltage entries as defined by NEC Tables 430.247, 430.248 and
430.250 can be used to determine motor loads.
induction/Synchronous/Dc Motor toggle
(ind/Sync/Dc) —
Toggles between Induction,
Synchronous, and Direct Current Motor Types.
Motor Horsepower
—
Enters or calculates
Motor Horsepower.
Starter Size (Starter) —
Displays the Starter
Size (from NEMA publication ICS 2-1988 Tables
2-327-1 and 2-327-2) based on the Phase,
Voltage, and Motor Horsepower settings.
Note:
Horsepower values not identified in NEMA
tables will cause the calculator to round up to the
next larger Starter Size in the table.
