GE Industrial Solutions MicroVersaTrip Plus and MicroVersaTrip PM for Allis Chalmers, Siemens_Allis, and Siemens LA-600[F] and LA-1600[F] (Blue) - Manual (Page 12)

12
Installing the Current Sensors
The current sensors must be installed differently in the two
breaker frame sizes.
LA-600 Current Sensors
The following procedure is illustrated in Figure 18.
1. Slide two of the current sensors (CTs) over the outer load
studs, then slide the other CT over the center load stud. The
terminals must be pointing up.
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 appro-
priate lengths. Attach the white wire to the terminal marked
with a white paint dot on the CTs and attach the black wire
to the other terminal.
3. Run the flux shifter lead through the hole in the breaker
frame on the lower right side (from the rear of the breaker),
as shown in Figure 18.
4. Attach the flux shifter connector in the wiring harness to the
connector on the leads from the flux shifter.
5. 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.
6. If the breaker is fused, reinstall the fuse assemblies on the
upper studs.
LA-1600 Current Sensors
The following procedure is illustrated in Figure 19.
1. Slide the three current sensors (CTs) over the lower (load)
studs, with the terminals pointing up.
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 appro-
priate lengths. Attach the white wire to the terminal marked
with a white paint dot.
3. Run the flux shifter lead through the hole in the breaker
frame on the lower right side (from the rear of the breaker),
as shown in Figure 19.
4. Attach the flux shifter connector in the wiring harness to the
connector on the leads from the flux shifter.
5. 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.
6. If the breaker is fused, reinstall the fuse assemblies on the
upper studs.
Figure 18. Installing the current sensors (LA-600).
Figure 19. Installing the current sensors (LA-1600).