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and
the
filter
are
Current Schematic
for selective pole tripping
supplied with each terminal.
ADJUSTMENTS AND MAINTENANCE
The
proper
adjustments
operation
of this relay have been made at the
factory
and should not be disturbed after re
ceipt
by
the
customer.
have
been
changed, the relay taken apart for
repairs, or
if
it
is
adjustments
at
regular
the instructions below should be followed.
All
contacts should be periodically cleaned
with
a
fine
file.
S#l002110 file is recom
mended
for this purpose.
material
for
cleaning contacts is not recom
mended,
because
of
the danger of
small particles in the face of the soft silver
and thus impairing the contact.
Phase Selector Element
Check the free movement of each element with
the
relay
in a vertical position to see that
it
is free from friction and properly center
ed.
The
loop
should
sition with the contacts open when the element
is completely deenergized.
With
the
loop
in the neutral position de
termined
by
gravity,
stationary contacts (front view) so that there
is contact gap of .01011 between moving contact
bridge
and
the stationary contacts.
the left hand back stop screws for .010 11
tact
deflection.
Adjust the left stop
strikes against the loop so that it makes con
tact
against
the
loop at the same time
moving contact deflects the stationary contact
against the two back screws.
justments
for
the right hand
stops.
Connect
terminals
25 and 24
pass 1 ampere, 60 cycles, from terminals 26 to
(This test is without the filter).
contact of
the bottom
moving
should
move
to
the
stationary
contacts.
shown
in the
Carrier
to
insure correct
If
the adjustments
desired to check
the
maintenance periods,
The use of abrasive
embedding
assume a vertical
po
adjust both
left-hand
Adjust
con
which
the
Repeat these ad
contacts
and
together
and
The
element
(sc)
right
and bridge
the
Reverse the connections
to terminals
25
and 26.
tacts
should now remain firmly closed.
current to 15 amperes and make sure
the
the
loop stop screws have the
minimum
contact
vibration.
should
be
passed only momentarily to prevent
overheating the fault detector coils.
Repeat
the tests on the middle element (S B )
by connecting terminals 22 and 25 together and
passing
current
through terminals 21
and
on
the
top
element
terminals
25 and 22 together and passing cur
rent through terminals 19 and 26.
Adjust the bearing screws of the moving loop
so that
there
is
about
See
that
the
loop does not bind
against
the iron or coil when pressed against
either end jewel.
Contactor Switch
Adjust the
stationary c · o re of the switch for
a
clearance
between
moving
the
core of 1/64" when the switch
picked up.
This
can
relay
up-side-down
or by disconnecting
switch
and
turning
it
screw
up the core screw until the moving core
starts rotating.
Now, back off the core screw
the
moving
core stops rotating.
until
indicates
the
points
assembly
is
taken
up,
core
just
separates from the stationary core
B ack off the core screw approximately
screw.
one turn and lock in place.
core from striking and sticking to the
moving
stationary core because of residual magnetism.
Adjust
the
contact
clearance
means
of the two small nuts on either side of
the
Micarta disc.
The switch should pick up
at 4
amperes d-e.
Test for sticking after 30
amperes d-e have been passed through the coil.
The coil resistance is approximately .025 ohms.
Operation Indicator
Adjust
the
indicator
ampere d-e. gradually applied by loosening the
two
screws on the under side of the assembly,
and
moving the bracket
The left-hand
con
Raise
that
adjustment for
This
current
and
26
(S
) by connecting
A
.010 inch end play.
or
strike
the stationary core and
is
be done by turning the
the
up-side-down.
Then
This
where
the play in the
and where the moving
This prevents the
for 3/32"
by
to
operate
at
1.0
forward or
backward.
5
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