Westinghouse TK Series Installation, Operation & Maintenance Instructions Manual

INSTALLATION
INSTRUCTIONS
CAUTION
Before putting relays into
remove all blocking which
serted for the purpose of securing
during shipment, make
parts operate freely,
see that they are clean
and operate the relay to check
and electrical connections.
APPLICATION
The Type TK Relay is an a-c timing relay for
applications requiring a definite
between the closing of an
closing or opening of other
cuits. Accurate time-settings
onds to fifty minutes
for any setting, the reset
one second.
The relay is used
quired in motor, generator,
It
trol circuits. is also widely
dustrial applications.
One of the relay is available for use
type
to
with a d-e a-c inverter where
a-c control voltage is not available.
verter is described in
CONSTRUCnON
The type TK relay consists of a synchronous
motor, a gear train to provide three different
ratios, a clutch interposed in the gear train
to permit quick resetting when
de-energized, a contactor which
main contacts and operates
tripping mechanism adjustable for
I. l. 41-574 .1
SUPERSEDES
*Denotes change from superseded issue.
TYPE TK TIMING RELAY
service,
may have been in­
the parts
sure that all moving
inspect the contacts to
and close properly,
the settings
time delay
a-c circuit and the
d-e or a-c cir­
from two sec­
can be obtained, and,
time is less than
where time delay is re­
or rectifier con­
used in in­
a reliable
The in­
41-856.
I.L.
OPERAnON
AND
the relay is
carries the
the clutch, and a
time-delay.
•
OPERATION.
Synchronous Motor
The motor for driving the
located on the back
assembly in the lower right-hand corner.
runs at a synchronous speed of
60, 50
R.P.M. for
Its bearing has
spectively.
with sufficient capacity for
normal operation.
higher, the contactor coil
�
out at the pr cr
transformer to supply
Gear Train and Clutch
The gear train is
unit and consists of two
fastened together
posts. The gear shafts run at low speeds
require no lubrication.
speeds are obtained by changing the
of a sliding gear
consists of two gears on a hub that is free to
slide on the clutch shaft and can be locked in
any desired position with
hub is moved to the position
gear is opposite the
corresponding to the desired time scale.
The clutch is two aluminum
rated faces, arranged
tively engaged and disengaged by a spring arm
on the contactor armature when the
in its closed and open positions respectively.
The rear disc is fastened to a shaft
gear train. The front
on the end of the same shaft.
has fastened to it the pinion which drives the
tripping mechanism.
gized, the clutch discs
transmitted from the
EFFECTIVE OCTOBER 1957
I. L. 41-57 4 . 1 A
•
MAINTENANCE
gear train
plate of the gear train
600, 500
or
25
or cycle relays
an oil reservoir
several years of
230
On relays rated at
has a tap brought
place to act as an auto­
115
volts for the motor.
assembled as a separate
brass bearing plates
at the corners by brass
The three different
location
assembly. This assembl y
a set screw.
where the larger
arrow on the index plate
disc with
so that they are posi­
latter is
on
disc is a running
The latter disc
When the relay is ener­
engage and power
motor, through the
is
It
250
re­
or
and
The
ser­
the
fit
is
gear