GEK-34054
Adjust the drag magnet to obtain a closing time as near as
possible to 1.31 seconds, but at least between 1.24 and 1.38 seconds.
The magnet should be approximately in the middle of its travel.
The
magnet is adjusted by loosening the nut under the magnet shelf.
Moving the magnet in decreases the time.
Moving the magnet out
increases the time.
When adjusting the drag magnet, be sure the outer edge of the
magnet never extends out beyond the cutout in the disk.
Be sure the
screw clamping the drag magnet to its supporting shelf is tight
before proceeding with other time checks.
Make sure the drag magnet
does not hit the counterweight at any position of the disk.
With the tap plug in the 2amp tap and the time dial at the No.
5
time setting,
check contact closing at 2 and 10 times tap value.
These closing times must be within the limits shown on Table
XV.
TABLE
XV
60HZ
TAP
AMPS
MIN .SEC.
MAX. SEC.
MIN. SEC.
2.0
4.0
6.70
7. 71
6.94
2.0
20.0
0.67
0.77
0.65
INSTANTANEOUS UNIT
1.
Both contacts should close at the same time.
50HZ
MAX. SEC.
7.98
0.75
2.
The backing strip should be so formed that the forked end (front)
bears against the molded strip under the armature.
3.
With the armature against the pole piece, the cross member of the
"T" spring should be in a horizontal plane and there should be at
least 1/32 inch wipe on the contacts.
Check this by inserting
a
0.012 inch feeler gage between the front half of the shaded pole
and the armature, with the armature held closed.
The contacts
should close with the feeler gage in place.
TARGET AND SEAL-IN UNIT
Check steps 1 and 2 as described under INSTANTANEOUS UNIT above.
To check the wipe of the seal-in unit, insert a 0.012 inch feeler
gage between the plastic residual of the armature and the pole
piece
with the armature held closed.
The contacts should close with the
feeler gage in place.
18
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