I.L. 41- 933. 3
The contact gap should be approximately 5/64" between the
bridging moving contact and the adjustable stationary contacts.
The bridging moving contact should to11ch both stationary contacts
simultaneously.
Routine Maintenance
All relays should be inspected periodically and the operation
should be checked at least once every year or at such other
time intervals as may be dicated by experience to be suitable
to the particular application.
All contacts should be periodically cleaned. A contact burnisher
S#l82A836H01 is recommended for this purpose. The use of
abrasive material for cleaning contacts is not recommended
because of the danger of embedding small particles in the face
of the soft silver and thus impairing the contact.
Calibration
Use the following procedure for calibrating the relay if the
relay has been taken apart for repairs or the adjustments have
been disturbed. This procedure should not be used unless it
is apparent that the relay is not in proper working order.
(See "Acceptance Check").
Unit
1.
The upper pin bearing should be screwed down until
there is approximately .025 clearance between it and
the top of the shaft bearing.
The upper pin bearing
should then be securely locked in position with the
lock nut.
The lower bearing
posi tion is fixed and
cannot be adjusted.
2.
The contact gap adjustment for the undervoltage unit
is made with the moving contact in the reset position,
i.e. , against the right side of the molded bridge.
Advance the right hand stationary contact until it
just touches the moving contact. Then advance the
stationary contact 1/4 turn. Now screw in the left
hand stationary contact until it just touches the
moving contact. Then back off the left hand stationary
contact one turn for a gap of approximately .030."
The clamp holding the stationary contact housing need
not be loosened for the adjustment since the clamp
utilizes a spring-type action in holding the stationary
contact in position.
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