Westinghouse RC, Instructions Manual

Page: 64 / 114

TYP E RC AUTOMATIC R ECLOSI NG RELAY
The following checks may be perfonned to deter­
mine if the relay, as received from the facto ry , is in
serviceable condition.
Energize the X,
Y
and motor coils with 50% of the
above ac ratings (or 80% of de rating) or at lower
ratings by bypassing the coil resistor or resistors.
Energize the
Z coil at 80% of pickup. See that X
and
Y
pick
up
po sitively and that proper contact
action is obtained . The correct adjustment of the X
unit is as follows: Set the distance from the front
end of the armature mold to the metal yoke to 1/2
inch. Set the X8 contact gap at 3/64" and the X9
gap at 3/32". With the above adjustment X9 should
have a minimum of 1/32" contact follow.
Y
unit
contact action is detailed under •construction. "
Determine the time required for one drum revolu­
tion. The time in seconds should correspond to the
drum speed dial marking ± 3 . 5%. Observe drum cam
action during this interval or by manually rotating the
drum with the push rod depre ssed.
R o uti ne Mai nte n a n c e
All contacts should b e periodically cleaned with
a fine file . A contact burnisher S#182A836H0 1 is
recommended for this purpose. The use of abrasive
material for cleaning contacts is not recommended,
because of the danger of embedding small particles
1 2
in the face of the soft silver and thus impairing the
contact.
Motor Lubrication
The motor bearing contains a supply of special
lubricant sufficient for from three to five years serv­
ice . This lubricant does not congeal at low tempera­
tures and permits satisfactory operation of the motor
at ambient temperatures of 30° F to -40° F, such as
sometimes may occur in outdoor installations. This
oil is available in 1 oz. bottles as S#1723639.
To lubricate the motor, withdraw the drum speed
dial assembly after removing the clamping screw and
the black screws. Then, gently work the motor and
gear asse mbly loose from the rear chassis mounting
plate and lower it under the front chassis mounting
plate . (When used , the
Z
unit must be removed). Re­
move the gear plate of the motor and gear assembly
and, th€n, the knurled oil cap . Saturate the wool with
8#1 723639 oil. Reas semble.
R E N E W A L P A R T S
Repair work can be done most satisfactorily at
th e facto iY . However, interchangeable parts can be
furnished to the customers who are equipped for doing
repair work. When orde:-ing p arts, always give the
complete nameplate date.
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