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The voltage at which the contact picks up can be
varied
by means of
the adjustable r esistor.
time for the moving contact to r eset to the right hand
stationary contact may be del ayed for a minimum o f
cycles (see section under "SETTINGS") .
5
Indicating Contactor Switch U nit (ICS)
The
indicating
contactor
operated clapper type device.
to which leaf-spring mounted contacts are attached,
is attracted to the magnetic core upon energization
of the switch. When the switch closes, the moving
contacts bridge two stationary contacts, completing
the
trip
circuit.
Also
fingers on the armature deflect a spring located on
the front of the switch, which allows the operation
indicator target to drop. The target is reset from the
outside of the case by a push rod located at the
bottom of the cover.
The front spring, in addition to holding the target,
provide restraint for the armature and thus controls
the pickup value of the switch.
Contacts
The
moving
contact
assembly in
unit
has
been
factory
bounce performance and should not be disturbed.
SE TTINGS
(V)
Overvoltage Unit
The
only setting
required
setting which is made by means of the adjustable
resistor.
Increasing
the
the pickup voltage.
For the
15-45
volt unit, the relay as received has
been factory adjusted to pick up at the high end of
the
pickup range.
Pickup at the low end of the
range can be achieved by merely shorting out the
resistor.
The
108- 132
volt unit can be adjusted from
132
volts by adjusting the resistor, and is normally
set for
108
volts at the factory.
The contact gap is factory adjusted for
5
cycle minimum reset time is desired simply back
off the left-hand station contact until the moving
contact does not make in the picked up position.
INSTALLATION
The relays should be mounted on switchboard panels
or
their
equivalent
in
moisture, excessive
vibration, and heat.
relays
vertically
by
means
2
Th e
switch
is
a
small
d-e
A magnetic armature,
during
this
operation
two
the overvoltage
adjusted
for
low
contact
is the pickup voltage
resistance
will
increase
108
to
.020".
If
a
location
free
from
dirt,
Mount the
of
the
four
mounting
holes on the flange for semi-flush mounting or by
means of the rear mounting stud or studs for pro
jection
mounting.
Either a mounting stud or
mounting screws may be utilized for grounding the
relay.
The
electrical
connections
directly to the terminals by means of screws for
steel panel mounting or the terminal studs furnished
with the relay for thick panel mounting. The ter
minal studs may be easily removed or inserted by
locking two nuts on the stud and then turning the
proper nut with a wrench.
AD J US T ME N T S & M A I NT E N AN CE
The proper adjustments· to insure correct operation
of this relay have been made at the factory. Upon
receipt
of
the
relay,
no
those
covered
under
"SETTINGS,"
required.
(V)
Overvoltage Unit
1.
Contact
Gap- The
gap
stationary and moving contacts with the relay in
the
de-energized
position
mately
.020".
2.
For the
15-45
volt unit, the pickup of the over
voltage unit can be checked by increasing the
voltage to the relay to
±
pickup within
of this value. The
5%
pickup can be checked by shorting the resistor
and increasing the voltage to this value. The
relay should pickup within
3.
For
the
108- 132
volt
adjusted to pickup anywhere within this range
with a resistor adjustment.
Indicating Contactor Switch (ICS)
Close the main relay contacts and pass sufficient
d-e
current through the trip circuit to
res.
contacts of the
This value of current should
be
between
1
and
1.2
should drop freely.
The
contact gap
should
between
the bridging moving contact and the ad
justable stationary contacts.
contact
should
touch
both
simultaneously.
ROU TINE
MAINTE NANC E
All relays should be inspected periodically and the
operation
should be checked at least once every
year
or
at
such
other time intervals
dictated
by experience to be suitable to the par
ticular application.
the
may
be
made
adjustments,
other
than
should
be
between
the
left-hand
should
be
approxi
45
volts. The relay should
volt
15
±
5%
of
15
volts.
unit, the
relay
can be
close the
amperes.
The indicator
be
approximately
5/64"
The bridging moving
stationary
contacts
as may
be
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