GE Industrial Solutions ProTrip Conversion Kits LA-600, LA-800, and LA-1600 - Manual (Page 10)

10
Installing the Current Sensors
The current sensors must be installed differently in
the two breaker frame sizes.
LA-600 and LA-800 Current Sensors
The following procedure is illustrated in Figure 10.
1. Slide two of the current sensors ( CTs) over the
outer load studs with their terminals pointing
upward. Slide the other CT over the center line
stud with its terminals pointing downward.
2. Connect the CT leads from the trip unit to each
of the CTs. The leads are labeled with the letter
of the corresponding pole (A is the right pole
from rear of the breaker, B is the center pole, C is
the left pole), and are also cut to the appropriate
lengths. Attach the white wire to the terminal
marked with a white paint dot on the A and C
(outer) CTs. Attach the black wire to the terminal
marked with a white paint dot on the B (center)
CT. This difference is necessary to maintain
proper polarity.
3. Reattach the primary disconnect assemblies to
all the studs if the breaker is unfused or to only
the load (lower) studs if the breaker is fused.
4. If the breaker is fused, reinstall the fuse assem-
blies on the upper studs.
LA-1600 Current Sensors
The following procedure is illustrated in Figure 11.
1. Slide the three current sensors (CTs) over the
lower (load) studs, with the terminals pointing
up.
2. Connect the CT lead s from the trip unit to each
of the CTs. The leads are labeled with the letter
of the corresponding pole (A is the right pole
from rear of the breaker, B is the center pole, C is
the left pole), and are also cut to the appropriate
lengths. Attach the white wire to the terminal
marked with a white paint dot.
3. Reattach the primary disconnect assemblies to
all the studs if the breaker is unfused or to only
the load (lower) studs if the breaker is fused.
4. If the breaker is fused, reinstall the fuse asse m-
blies on the upper studs.
Figure 10. Installing the current sensors on an LA-600 or LA-800
breaker..
Figure 11. Installing the current sensors on an LA-1600 breaker..
CT Wire
Exit Hole
CT Wire
Exit Hole