GEK-49865
Apply
1.3
times tap-setting voltage to the relay.
Adjust the position of the drag
magnet assembly to obtain an operating time as close as possible to 9.5 seconds, at
least between 9.4 and 9.6 seconds.
The drag magnet assembly should be approximately in the middle of its travel.
The
drag magnet assembly is adjusted by loosening the two screws securing it to the
support structure. See Figure 1.
Moving the drag magnet towards the disk and shaft
decreases the operating time, and moving the drag magnet away from the disk and
shaft increases the operating time.
The screw securin9 the drag magnet assembly to
the support structure must be tight before proceeding with other time checks.
Mechanical Adjustment
The disk does not have to be in the exact center of either air gap for the relay to
perform correctly.
Should the disk not clear all gaps, however, the follm�ing
adjustment can be made.
1.
Determine which direction the disk must be moved to clear all gap surfaces by
0.010 inches.
2.
Remove the drag magnet assembly, by loosening the two screws securing it to the
support structure. The screws need not be removed.
3.
Loosen the upper pivot-bearing
set
sere\\ (1/16 inch hex wrench) slightly, so
the upper pivot can move free
1
y.
Do
not
remove the set screw from the support
structure.
4.
Loosen the jewel-bearing
set
screw as in
3
above.
5.
Apply a slight downward finger pressure on the upper pivot and turn the jewel
bearing screw, from the underside of the support structure, to position the
disk as determined in step 1 above.
6.
Turn the jewel-bearing screw 1/8 turn clockwise and tighten the upper pivot
set
screw to
2.5-3.5
inch pounds o f torque.
7.
Turn the jewel-bearing screw 1/8 turn counterclockwise.
This will lower the
disk and shaft assembly approximately 0. 005 inch and permit proper end-play.
The shaft must have 0.005-0.010 inch of end-play.
8.
Tighten the jewel-bearing
set
screw to 2. 5-3.5 inch pounds of torque.
9.
Rotate the disk through the electromagnetic gap.
The disk should clear the gap
surfaces by 0.010 inch and be within 0. 005 inch flatness.
If the disk is not
within 0.005 inch flatness, the disk should be replaced.
10.
Reinstall the drag magnet assembly and check that the disk has at least 0.010
inch clearance from the drag magnet assembly surfaces.
11. Tighten the drag magnet assembly mounting screws with 7-10 inch pounds of
torque, after securely setting the assembly and positioning it according to the
time test above.
16
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