TYPE RC AUTOMATIC R ECLOSING RELAY
The following checks may be performed to deter
mine if the relay ,
as
received from the factory, is in
serviceable condition.
Energize the X,
Y
and motor co il s with 50% of the
above ac ratin gs (or 80% of de rating) or at lower
ratings by bypassin g the coil resistor or resistors.
En ergize the
Z
coil at 80% of pickup.
See that X
and
Y
pick
up
positively and that proper contact
1r
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 correspon d 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 s sed.
R o uti n e Moi n�e nonce
All contacts should be periodically cleaned with
a fine file . A contact burnisher S#182A836H01 i s
l'ecommended for this purpose . The use of abrasive
material for cleaning contacts is not recommended ,
because o f the danger of embedding small particles
1 2
in the face of the soft silver and thu s impairing the
contact.
Motor Lu brication
The motor bearing c ontains a supply of special
lu bricant sufficient for from three to five years serv
ice. This lu bricant does not congeal at low tempera
tures and p ermits 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 as sembly loose from the rear chassis mounting
plate and lower it u nder the front chassis mounting
plate. (When used, the
Z
unit must be removed). Re
move the gear plate of the motor and gear as sembly
and, then, the knurled oil cap. Saturate the wool with
S#1 723639 oil . Reassemble.
R E N E W A L P A R T S
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 dat e .
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. ElectricalPartManuals
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