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circuit resistor is adjusted so that the contact will
meter reading of 120 0 or 3QQO (angles of zero torque).
left contact at all angles between 1200 and 3000 .
one unit at a time.
energizing
PICKUP ADJUSTMENT
* The control spring adjustment is made by using the connections of Figure 11.
single-phase test connects the three potential coils in parallel and the three
current coils in series.
maximum torque.
would have to be used if the three units were at the angle of maximum torque.
example, if the minimum pickup setting required at maximum torque angle is 0. 004
ampere, then 1. 15 x 0. 004 ampere, or 0. 0046 ampere, should be applied to the current
circuit and the control spring should be moved in the counterclockwise direction
until the left contact is just closed.
CLUTCH ADJUSTMENT
Using the connections of Figure 11, increase the current to 10 amperes and see that
the clutch does not slip.
potential circuits.
"hairpin" clip at the top of the moving contact shaft.
turning, then the clutch is not slipping.
the clutch should be tightened.
side of the moving contact assembly, and then turning the adjusting screw in until
the clutch stops slipping.
HIGH-SEISMIC TARGET AND SEAL-IN UNIT
Both contacts should close at the same time, and the backing should be so formed
that the forked end (front) bears against the molded strip under the armature.
Sin�e mechanical adjustments may affect the Seismic Fragility Level, it is
adv1sed that no mechanical adjustments be made if seismic capability is of
concern.
To check the wipe of the seal-in unit, insert a 0. 010 inch feeler gauge between the
plastic residual of the armature and the pole piece with the armature held closed.
Contacts should close with the feeler gauge in place.
Sufficient quantities of renewal parts should be kept in stock for the prompt
replacement of any that are worn, broken or damaged.
When ordering renewal parts, address the nearest Sales Office of the General
Elect ric Company.
complete nameplate data, including the serial number, of the relay.
*
Revised since last issue
With these connections, each unit is 300 off the angle of
It is therefore necessary to apply 1. 15 times the current that
This test should be made with rated voltage on the
It can be determined if the clutch is slipping by watching the
This is done by loosening the locknut on the right
The locknut should then be retightened.
RENEWAL PARTS
Specify the name of the part wanted, quantity required, and
GEK-65525
If the clutch slips at 10 amperes, then
CAUTION
not move at a phase angle
The relay should close its
This test is performed by
If the hairpin clip is not
This
For
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