Motor Terminology
V
Vacuum Degassed Bearings:
Vacuum degassing is a process used in the purifying of steel for ball
bearings assuring a very dense and consistent bearing surface. This results in a
longer lasting superior bearing.
Variable Torque:
A multi-speed motor used on loads whose torque requirements vary with
speed as in some centrifugal pumps and blowers. The HP varies as the square of
the speed.
Vertical Motor:
A motor being mounted vertically (shaft up or down) as in many pump
applications.
Vertical "P" Base Motor:
A vertical motor with a special mounting face conforming to NEMA's
"P" design and with a ring groove on the shaft.
Voltage:
The force that causes a current to flow in an electrical circuit.
Analogous to pressure in hydraulics, voltage is often referred to as electrical
pressure. The voltage of a motor is usually determined by the supply to which it
is being attached. NEMA requires that the motor be able to carry their rated
horsepower at nameplate voltage plus or minus 10% although not necessarily at
the rated temperature rise.
Voltage Drop:
Loss encountered across a circuit impedance from power source to
applicable point (motor) caused by the resistance in conductor. Voltage drop
across a resistor takes the form of heat released into the air at the point of
resistance.