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GEI-83910
SERVICING
If any of the mechanical or electrical check points described in the previous
sections are found to be out of limits, the following points should be observed in
restoring them.
MECHANICAL ADJUSTMENTS
1.
Gl-unit low-gradient (right-hand) contact adjustment:
a.
With the relay setting upright, and the moving contact held away from the
stationary contact, both the stationary-contact brush and the moving-
contact brush should touch their respective retainers (See Figure 5).
b.
With the relay lying on its right side and the moving contact held clear,
the stationary-contact brush should just part from its retainer under its
own weight.
c. With the relay lying on its left side and the moving contact held clear,
the moving-contact brush should just part from its retainer under its own
weight.
d.
With the relay vertical and de-energized, the contacts should make with
(0.003-0.005 inch) deflection on each brush from its own retainer.
To
adjust the contact wipe proceed as follows:
Adjust the stop screw in the face of the stationary contact so that the
contact tips just separate, and then back it off 1/2 turn.
e. The gap on the normally-open contact should be between 15 and 20 mils,
which can be achieved as follows:
Adjust the left contact barrel until the contacts just part, and then back
the barrel off 1/2 to 2/3 of a turn.
2.
G2-unit contact adjustment.
a. With the unit completely de-energized, adjust the control spring so that
the center line of the moving contact arm is parallel to the sides of the
relay.
b.
Using a neon light as an indication of contact closure, turn both contact
barrels into the moving contact until they just touch.
c.
Lock the left barrel in place by means of the clamping screw.
d.
Rotate the right barrel approximately 210· to obtain the 0.015-0.020 gap.
e.
Lock the right barrel in place.
3.
GO-unit contact adjustment.
a.
The GD unit adjustment is similar to the G2 unit previously described,
except the right barrel is locked in place and the left barrel is rotated
to obtain the 0.015-0.020 inch contact gap.
15
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