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4-3-4 THE ADVANTAGES OF CURRENT TRANSFORMER CONTROL (RGV13100T)
With AVR control, control is effected according to variations in output voltage.
When an inductive load is applied, a large starting current is required (current variations are
greater than voltage variation), precise control becomes difficult.
Current transformer control, on the other hand, controls the output voltage according to the
load current, which is better for using inductive load.
4-3-3 CURRENT TRANSFORMER CONTROL (RGV13100T)
When the engine starts, a permanent magnet implanted in the rotor rotates, creating voltage in
the main coil (MC). When a load makes contact with the coil, the load current passing through
the primary coil of current transformer causes a magnetizing current to flow in ratio to the load
current flowing through the current transformer primary coil. This magnetizing current passing
through a diode to field coil creates a strong magnetic field in the rotor which falls with the
amount of the load, increasing the voltage.
R
Grn
W
Blk
R
W
Blk
Brn
Grn/W
Y
R
Y
W
Y
Blk
GENERATOR CONTROL BOX
V
PL
Hr
AC Winding
Feld Winding
Brush
Brush
Diode
unit
AC output
receptacle
(
120V
)
REC1
AC output receptacle
(120V : Single phase)
(208V : Three phase) REC5
AC output receptacle
(
120V
)
REC2
W
X
W
W
H
G
G
G
Y
Z
Grn/Y
Grn/Y
Voltmeter
No-fuse
breaker
Earth
(Ground)
terminal
Pilot
lamp
Hour
meter
Grn
Key switch
(
-M
)
Current
transformer
1
23
1
23
1
23