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GEI-12083
meter for 0 degrees. The clutch should slip between 7.5 and 10 amperes.
Adjust the screw and locknut
located on the right side. front view of the moving contact assembly if the clutch slip is not as listed
above.
Clutch slip ;s considered acceptable if the cup assembly makes one or more revolutions. This can
be determined by visually noting the movement of the u-shaped pin located at the top of the cup shaft.
MECHANICAL ADJUSTMENTS
SERVICING
12CAPI5A(-)A
The clutch can be checked by connecting the relay per Figure8A. current and voltage. With rated
voltage applied, increase the current until the clutch begins to slipi this should occur between 7.5 and
10 amperes.
Check the end play which is the upper end play of the cup and movina contact assembly. This should
be between 1/64 inch and 1/32 inch.
The contact gap with the relay de-energized should be 0.016-0.020 inch.
The holding coil gap should be approximately 0.055 inch (±) 0.005 inch.
Co~nect
studs 1 and 11 to a variab1ed-csource. Close the left contact and the target should operate
as follows.
Target Rating - Amps
Operatina Current - Or Less
0.20
0.17 amps
1.00
0.85 amps
POLARITY TESTS
Complete polarity tests are made in the factory and these may be checked by connecting terminals A
and C together, connecting terminals Band D through a resistor (20 ohms) and apply rated voltage to ter-
minals C and D. With these connections, the left-hand contact (front view) should close in each of the
following eight checks:
TABLE II
Current Coil
I
Potential Coil
A
B
C
,
D
3
4
I
19
20
3
4
14
13
4
6
!
17
18
4
6
20
10
7
8
15
16
7
8
18
17
9
10
13
I
14
9
10
I
16
15
I
PHASE ANGLE TESTS
Connect the relay to an external circuit according to that shown in Mgure 8A. With this connection,
the polyphase phase angle of the relay can be checked. The angle of maximum torque with the 8A connections
should be 40 degrees lead
(~)
five degrees.
Pickup should be less than 0.025 amperes at rated
vo1tao~
and
frequency at the angle of maximum torque.
If a phase shifter, phase-angle meter is not available, the 12CAP15A(-)A can be rechecked or recali-
brated as follows:
(a)
Return the control spring to its neutral (centered between the contacts) by loosening the hex
stud at the top rear of the unit, and turning the control spring adjuster to accomplish the
centering.
10
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