GE AKR-30 Series Maintenance Manual page 258

SECTION 1 4-MicroVersaTrip® Plus and MicroVersaTrip® PM Trip U nits
FIG. 1 1 5
1 4.5 PHASE C U RRENT SENSORS
The current sensors supply the power and signal input
necessary to operate the tri p system Fig. 1 1 6 shows the
fixed phase sensors available. The sensors have a polar­
ity associated with their windings. The common term inal
of the sensor is the right hand terminal. A white wire with
a push-on term inal will be connected to this common
terminal . All phase sensors must be correctly wired for the
programmer summing circu itry to function properly.
80
TAPPED
FIG. 1 1 6
The fixed phase sensors are avai lable with an add itional
winding. Th is winding is brought out to separate flag
(
term inals. These phase sensors are used when the hi­
level instantaneous ' H ' -option
shows an ' H ' -option phase sensor. When the ' H ' -option
phase sensor is instal led , there are four leads connected
to it. There is no polarity associated with the ' H ' -option
windings.
FIG. 1 1 7 'H'-OPTION PHASE SENSOR
)
is req u ired. Fig. 1 1 7