Switchboard
Feeder Busway
Filler Plates Plates used cover unused spaces panel.
Contactor
Overload
Relay
Motor Starter
Circuit Breaker
L1
L2
L3
M
M
M
OL
OL
OL
OL
M
Ma
Auxiliary
(Holding)
Contact
Overload
Contact
Starter
Coil
Overload
Relay
Contactor
.
Full-Voltage Starter type motor starter often used for three-phase induction
motors that applies the full line voltage the motor
immediately.The symbol for
frequency “f.
Four-Quadrant Operation Describes the operation variable speed drive that capable
of providing forward reverse torque with the motor rotating in
either the forward reverse direction.
T Torque
N Speed
+ Forward
+N
-N
CW Rotation
CW Rotation
CCW Rotation CCW Rotation
First Quadrant
Braking
Driving
Braking Driving
+T
-T
T
N
N
T
T
N N
T
Fourth Quadrant
Second Quadrant
Third Quadrant
- Reverse
Frequency The rate variation periodic waveform. Sometimes called across-the-line starter.14
Feeder Busway Busway used distribute feeder current loads that are
sometimes remote from the power source.
”The unit for frequency Hertz
