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INSTALLATION
INSTRUCTIONS
CAUTION
Before putting rel ays into
remove all
bl 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
applications
requiring a definite
between the cl osing of an
cl osing or opening
of other d-e or a-c
cuits.
Accurate time-settings
onds
to fifty minutes
for
any setting, the reset
one second.
The
relay
is used
where
quired in motor,
generator,
trol
circuits.
It is also widely
dustrial applications.
One type of the
rel ay is avail able for use
with a
d-e
a-c inverter where
to
a-c control voltage is not available .
verter
is described in I.L.
CONSTRUCTION
AND
The type TK
relay consists of a synchronous
motor, a gear train to provide three different
ratios, a cl utch
interposed in the gear train
to
permit q uick
resetting when
de-energized, a
contactor which
main
contacts and operates
tripping mechanism adj ustable for
41-574.1
SUPERSEDES I.L.
sYz•
Revised to include
•
TYPE TK TIMING RELAY
service,
may have
been in
the
parts
sure that
all
moving
to
and cl ose
properly,
the settings
time delay
a-c circuit and the
cir
from two sec
can be
obtained, and,
time is l ess than
time
delay is re
con
or rectifier
in
used in
a
reliable
The in
41-856.
OPERATION
the relay is
carries
the
the clutch, and a
time-delay.
A
Metal Case.
•
OPERATION
Synchronous Motor
The motor
for
driving the
l ocated on the back plate of the gear
assembl y in the
l ower right-hand corner .
runs at a synchronous speed of 6 00, 500 or 250
R . P . M.
for
60, 50
or 25 cycle relays
spectively .
Its bearing has
with sufficient capacity for
normal operation.
On rel ays rated at 230
higher, the
contactor coil
out
at the proper
place to act as
transformer to suppl y 115 volts for the motor.
Gear Train and Clutch
The gear
train is
assembl ed as a
unit and consists of two
fastened
together
at
posts.
The gear shafts run at l ow speeds
require no
l ubrication .
speeds are
obtained by changing the
of a
sliding gear
assembl y.
consists of two gears on a hub that is free to
slide on the cl utch shaft and can be l ocked 1n
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 scal e.
The clutch
is two al uminum
rated faces, arranged
tively engaged
and disengaged by a spring arm
on the
contactor armature when the
in its cl osed and open positions respectivel y.
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
EFFECTIVE SEPTEMBER
4 1 -574.18
I.L.
MAINTENANCE
gear
train
is
train
It
re
an oil reservoir
several years of
or
has a tap brought
an
auto
separate
brass bearing plates
the
corners
by brass
and
The
three different
l ocation
This
assembly
a set
screw.
The
where the l arger
disc with
ser
so that they are
posi
l atter is
on
the
disc is a running
fit
The l atter disc
relay is
ener
engage and power
is
�ear
1959
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