Product Manual

Foot-Pound: Energy required to raise a one-pound weight against the
force of gravity the distance of one foot. A measure of torque. Inch-
pound is also commonly used on smaller motors and gear reducers. An
inch-pound represents the energy needed to lift one pound one inch;
an inch-ounce represents the energy needed to lift one ounce one inch.
Form Factor: Indicates how much AC component is present in the DC
output from a rectified AC supply. Unfiltered SCR (thyristor) drives have
a form factor (FF) of 1.40. Pure DC, as from a battery, has a form factor
of 1.0. Filtered thyristor and pulse width modulated drives often have a
form factor of 1.05.
Frame: Standardized motor mounting and shaft dimensions as
established by NEMA or IEC.
Frequency: Alternating electric current frequency is an expression of
how often a complete cycle occurs. Cycles per second describe how
many complete cycles occur in a given time increment. Hertz (hz) has
been adopted to describe cycles per second so that time as well as
number of cycles is specified. The standard power supply in North
America is 60 hz. Most of the rest of the world has 50 hz power.
Full Load Amperes (FLA): Line current (amperage) drawn by a motor
when operating at rated load and voltage on motor nameplate.
Important for proper wire size selection, and motor starter or drive
selection. Also called full load current.
Full Load Torque: The torque a motor produces at its rated horsepower
and full-load speed.
Fuse: A piece of metal, connected in the circuit to be protected, that
melts and interrupts the circuit when excess current flows.
Generator: Any machine that converts mechanical energy into
electrical energy.
Grounded Circuit:
• An electrical circuit coupled to earth ground to establish a reference
point.
• A malfunction caused by insulation breakdown, allowing current flow
to ground rather than through the intended circuit.
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