Eaton AMH-4.76-VR Instruction Book page 27

Sttp 5 - Clean the far left cam with a mild solvent such as alcohol.
Place the tape around the cam starting from the bottom up. Make
certain that the tape adheres well to the cam surface. (Figure 6.6).
Sttp 6 - Mount the transparent CloSure™ Test Tool (Figure 6.7b)
with two bolts and washers. Refer to Figure 6.7a and Table 6.1 for
approximate mounting holes. Hand tighten the bolts.
Sttp 7 - Using a red Sanford
®
(or equivalent), place the marker tip in the proper hole ("C")
located over the cam and make a heavy mark on the tape by
moving the marker as described in Figures 6.9, 6.11, and 6.12.
Remove the marker from the hole.
Sttp 8 - Charge the closing springs with the maintenance tool
(Charging handle). Continue charging the closing springs until
a "click" is heard and the status indicator shows "CHARGED"
(Figure 6.8).
Sttp 9 - Place the marker back in the hole. While holding the marker
tip against the tape, close the breaker (Figure 6.10). Remove the
marker from the hole.
Sttp 10 - While closely observing the pole shaft at the right side of
the circuit breaker (Figure 6.11), recharge the closing springs with
the maintenance tool. As the circuit breaker is recharged, there
should be no movement of the pole shaft. If there is movement of
the pole shaft while recharging, this indicates a problem with the
circuit breker - stop the test and consult the factory.
Sttp 11 - Open the circuit breaker, then close it, then reopen it.
Verify that the mark made in Step 7 is aligned with the pen
opening. If it is not aligned, this indicates a problem with the
circuit breaker - stop the test and consult the factory.
Sttp 12 - Inspect the circuit breaker to assure it is in the open
position and the closing springs are discharged. Alternately
depress the Open and Close clappers a few times to ensure the
circuit breaker is completely discharged. Remove the transparent
CloSure™ Tool.
Sttp 13 - Remove the tape from the cam and place it on a sheet of
paper that can be kept as a record of the test. Record the date of
the test, person conducting the test, circuit breaker serial number,
and the operations counter on the tape or paper (Figures 6.14 and
6.15).
Sttp 14 - Evaluate the CloSure™ performance by comparing the
test tape with the illustration in Figure 6.16. Measure the over
travel "X" . If "X" is not greater than or equal to 0.6" , this indicates
a problem with the circuit breaker - consult the factory.
Sttp 15 - Reassemble the front cover onto the circuit breaker.
Return the circuit breaker to its original configuration and setup.
Figurt 6.7. Attaching CloSurt™ Ttst Tool at Holt "A" & "B"
Sharpie fine point permanent marker
®
Figurt 6.7.b. Front Vitw of CloSurt™ Tool Showing Mounting /
Ttsting Holt Locations (6352C49H01)
A-1
A-2
C-2
A-3
C-1
A-4
C-3
B-1
B-2
Tablt 6.1. CloSurt™ Tool Mounting / Ttsting Locations by
Circuit Brtaktr Typt
APPROXIMATE
MECHANISM
ELEMENT CHASSIS WIDTH
DESIGNATION (INCH)
18WR 18
20WR 20
29WR 27
Figurt 6.7.c. Typical Circuit Brtaktr Front Vitw with CloSurt™
Tool Attachtd (Approximatt Mtchanism Chassis Width)
Instruction Book IB182023EN March 2016 www.eaton.com
AMH-4.76-VR
Replacement Circuit Breaker
C-4 C-5 C-6
UPPER LOWER MARKER
MOUNTING MOUNTING PLACEMENT
HOLE HOLE HOLE
A1 B2 C1
A1 B2 C2
A1 B2 C5
Width
27