�-
3.
GEK-34055
Connect the operating coil terminals to a source of the proper frequency and good waveform having
a voltage of 120 or more, with pure resistance load boxes for setting the current. See test circuit
Fig.
13.
Set the tap plug in the 2 amp tap, and the time dial where the c�ntacts are just open. Set the
resistor at the midpoint of its range and check the current requ1red to just close the contacts.
It should fall within the limits given in Table XII.
TABLE XII
TAP RANGE
MINIMUM
0.5-4.0
•
2. 0-15. 0
2 AMP
•
It should never be necessary to wind up the control spring adjustor more than
30
degrees (one notch)
or unwind it more than 90 degrees (three notches) from the factory setting to obtain the above pickup
setting.
4.
After pick up has been set within the prescribed limits, the compensation must be checked. With the
2 amp tap setting as in paragraph 3, set the time dial at �o. 10 and check the current required to just
move the disk away from the stop arm. This current should be within the limits shown in Table XIII
which are
!6%
of tap amperes. If the disc moves at the lower limit, check that movement is not over
1/2" measured along the periphery of the disc.
TABLE XIII
TAP RANGE
TAP
MINIMUM
2.0-15. 0
2 AMP
1. 88
2.12
If the current falls outside these limits, the following steps should be taken.
Reset the control
spring until compensation at #10 time dial setting is within the limits shown above. Then set at
#1/2 T.D.S. and restore pick up by adjusting the resistor. Compensation should be rechecked after
the resistor adjustment.
With the contacts just open, check the current required to just close the contacts on each of the other
taps. This current should be within
±
3% of tap value.
•
With the time dial at No. 10 time setting and the tap plug in the 2 amp tap, apply sufficient current
to the relay to definitely close the contacts. Reduce the current to 80 percent of tap value and the
disk should reset all the way to the No. 10 dial setting position.
•
With the tap plug in the
2
amp tap and the time dial at N o. 5 time setting, apply five times tap
current to the relay.
Adjust the drag magnet to obtain a closing time from o.89 to 0.95 seconds. However, it is preferable
to adjust the time delay as near as possible to 0.92 seconds. The magnet should be approximately in the
middle of its travel. The magnet is adjusted by loosening the nut under the maonet shelf. M oving the
magnet in decreases the time, movino the magnet out increases the time.
When adjusting the drag magnet, be sure the outer edge of the magnet never extends out beyond the cut out
in the disk. Be sure the nut 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 di
j
1'
With the tap plug in the 2 amp tap and the time dial at the N o.
5
time setting, check the contacts
closing at 2 and 10 times tap value. These times must be within the limits in Table XIV.
12
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