Letter Sp

Speed-Torque Curve

A graphical representation of the torque provided by a motor
over a range of speeds.


Splice Plates, Splice Bars Plates or bars used to join the horizontal bus bars of adjoining switchboard or motor control center sections.



Starter Ratings

Motor Starters are rated according to size and type of load.
NEMA and IEC rate motor starters differently. IEC-rated devices
are rated according to maximum operational current. NEMA
specifies sizes from size 00 to size 9.


Stator

The stationary elements of the magnetic circuit of a rotating
machine such as a motor.

Step-down Transformer A transformer with more turns of wire in its primary coil than in
its secondary coil. The step-down transformer is used to step
down the primary voltage to a lower secondary voltage.