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Instruction Book IB019009EN November 2017 www.eaton.com
AK-2-25, AK-2A-25, & AK-3A-25 LV-VSR
Breaker-To-Motor Starter Conversion
SECTION 5.B: INSTALLATION OF
AK-2A-25 LV-VSR
5.B.1 CELL MODIFICATION INSTRUCTIONS
WARNING
FAILURE TO COMPLETE THE FOLLOWING CELL CODING MODIFICATION
TO EACH CELL INTENDED TO RECEIVE THIS SPECIFIC BREAKER-TO-
MOTOR STARTER REPLACEMENT (VSR) CAN RESULT IN DAMAGE TO THE
VSR, DAMAGE TO THE SWITCHGEAR AND ATTACHED EQUIPMENT AND
COULD RESULT IN BODILY INJURY OR DEATH. DO NOT PERFORM THESE
MODIFICATIONS ON AN ENERGIZED CELL.
IF THE CELL CAN NOT BE DE-ENERGIZED, THEN PROPER NFPA 70E
PERSONAL PROTECTIVE EQUIPMENT MUST BE WORN AT ALL TIMES
WHILE PERFORMING THE CELL CODING MODIFICATION. FAILURE TO
COMPLY WITH THIS WARNING COULD CAUSE SEVERE PERSONNEL
INJURY, EQUIPMENT DAMAGE, OR DEATH.
IMPORTANT NOTE: THE LEFT TRACK IS MODIFIED FOR 425 AMP SIZE
STARTERS. THE RIGHT TRACK IS MODIFIED FOR 120 AMP SIZE STARTERS.
1. Pull the track to be modified out to the limit of its travel and
install the cell cutting template assembly so that the mounting pins
drop into the existing slots in the track. (Figure 5.B.1)
2. Matching the holes in the clamping plate and drilling template,
mount the clamping plate on the opposite side of the track using
the hardware provided. This is a temporary installation therefore no
torque value is needed.
3. Using a ½” drill bit, drill the hole in the cradle arm with the drill
bushing as a guide for the drill bit. The leftmost drill bushing is the
guide for 425 amp starters, the rightmost drill bushing will be used
as a guide on 120 amp size starters.
Figure 5.B.1. AK-2A-25-LV-VSR Cell Modification
(425A Modification Shown)
5.B.2 INSERTION PROCEDURE
otee:
N
The secondary blocks are factory equipped with shims on both sides
of the LV-VSR (Figure 3.4). If the secondary blocks are not at the correct
distance and cause interference, remove the shims by removing the three
.25-20 screws and washers on each side and then the shim. Reinstall the
screws and washers as they were (the shim can be mounted to the opposite
side of the secondary mounting bracket in case it is needed in the future).
1
2
3
1
Clamping plate
2
Drill Bushing
3
Drilling Template
INSERTION:
1. Place the jackscrew shaft handle on the jackscrew shaft which is
located on the left side of the compartment. (Figure 5.B.2)
2. Turn the jackscrew shaft handle counter clockwise until jackscrew
is stopped. The position indicator should indicate that the Starter is
in the “DISC” (‘Disconnect’) position.
3. Remove the jackshaft handle from the shaft and open enclosure
door.
Figure 5.B.3. Extending Rails of AK-2A-25-LV-VSR Cell
Figure 5.B.2. Jackscrew Shaft on AK-2A-25-LV-VSR Cell
4. Pull the right track out to its limit by rotating the two track lock
links and pulling on the track as far out as it will move. (Figure 5.B.3)
5. Raise the Starter using a lifting device until the mounting pins are
approximately one inch above the tracks.
6. Pull the left track to its limit of travel and lower the Starter so that
the pins on each side of the starter drop into the slots located in the
track. Remove the lifting device.
7. Push the Starter in until the track stops. Lock the two track lock
links into place and close compartment door
