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CAunON
Before putting rel ays into
remove all
b l ocking which
serted for the purpose of securing
during
shipment, make
parts operate freely, inspect the contacts
see
that they are cl ean
and operate
the relay to check
and el ectrical connections.
APPLICATION
The Type TK Relay is an a-c timing rel ay for
appl ications
requiring a definite
b etween the cl osing of an
cl osing or opening
of other
cults. Accurate time-settings
onds
to fifty minutes
for
any setting, the reset
one second.
The relay
is used
quire d in motor , gene rator, or rectifier
trol circuits .
It is also widely
dust rial app lications .
One
of the
relay is avail abl e for use
type
with a d-e
t o a-c i nverter where
a·c control voltage is not avail ab l e.
v
r
erte
is describ e d in
CON STRUCTION
The type TK
rel ay 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 adjustab l e for
41 -574. 1 8
SU PERSEDES I . L.
* Denotes change from superseded issue.
INSTALL A Tl 0 N
I N S T R U C T I O N S
TYPE TK TIMING RELAY
service,
may have
been in
the
parts
sure that
all
moving
to
and close
properl y,
the settings
time delay
a-c circuit and the
d-e or a-c
cir-
from two sec-
can b e
ob tained, and,
time is l ess than
where
time delay is re
con
used in in
a
reliab le
The in
4 1 -856 .
I . L .
AND
OPERATION
the relay is
carries
the
the clutch, and a
time-delay.
Westinghouse
•
OPERATION
Synchronous Motor
The motor
for
driving the
l ocated on the b ack
plate of the
assemb l y in the
l ower right-hand corner.
runs at a synchronous speed of 6oo, 500 or 250
R. P.M.
for
60, 50
or 25 cycle
spectively.
Its b earing has
with sufficient capacity for
normal operation.
On relays rated at 230
higher, the
contactor coil
out
at the proper
pl ace to act as
transformer to suppl y 115 volts for the motor.
Gear Train and Clutch
The gear
train is
assemb led as a
unit and consists of two b rass bearing pl ates
fastened
together
at
posts.
The gear shafts run at l ow speeds
require no
l ubrication.
speeds are
obtained b y changing the
of a
sl iding gear
assembly.
consists o f two gears on a hub that is free to
sl ide on the cl utch shaft anG can be l ocked in
any desired position with
hub is moved to the position
gear is opposite the
arrow on the index pl ate
corresponding to the desired time scale.
The cl utch
is two aluminum
rated faces, arranged
tively engaged
and disengaged by a spring arm
on the
contactor armature when the
in its cl osed 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.
When the
gized, the
cl utch discs
transmitted from the
motor, through the
41 -574 . 1
I .L.
•
MAINTENANCE
gear
train
is
gear
train
It
relays
re
an oil reservoir
several years of
or
has a tap b rought
an
auto
separate
the
corners b y b rass
and
The
three different
l ocation
This
assembl y
a set
screw.
The
where the larger
disc with
ser
so that they are
posi
l atter is
on
the
disc is a running
fit
The l atter disc
rel ay is
ener
engage and power is
�ear
EFFECTI VE MAY 1 96 1
c
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