3.
For greater accuracy pre-heat the relay by applying
rated voltage for approximately one hour prior to
setting the sensitivity.
The sensitivity adjustment is made by varying the
tension of the spiral spring attached to the moving
element assembly.
The spring is adjusted by placing
a screwdriver or similar tool into one of the
notches located on the periphery of the spring
adjuster and rotating it.
The spring adjuster is
located on the underside of the bridge and is held
in place by a spring type clamp that does not have
to be loosened prior to making the necessary
adjustments.
Apply the desired dropout voltage to the relay and
adjust the spiral spring as noted above until the
moving contact just makes with the right hand
stationary contact.
Adjust the contact gap for approximately
5/64" (-1/64", +0).
Close the main relay contacts and check to see that the relay
picks up and the target drops between
1
and
1.2
amperes d-e.
To increase the pickup current remove the molded cover and bend
the springs out or away from the cover.
To decrease the pickup
current bend the springs in toward the cover.
RENEWAL PARTS
Repair work can be done most satisfactorily at the factory.
However, interchangeable parts can be furnished to the
customers who are equipped for doing repair work.
When ordering
parts, always give the complete nameplate data.
Requirements
The burden at
120
volts
60
cycles is
4.3
volt-amperes.
The undervoltage unit has a continuous rating of
132
volts.
-6-
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