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b)
Set current IT at the value shown in Table XIII and adjust
the
phase
approximately 75° .
c)
Close switch
Two of the oscilloscope goes low and measure the width of the
timer input blocks on Channel One for this condition.
time is the setting of the "CHARACTERISTIC TIMER", and it can
be increased by turning potentiometer P7 clockwise.
In
order
to
procedure is recommended:
a}
Change Channel One of the oscilloscope from test point "BIN"
on the "IT" card to the test point "MOB" on the "SP" card.
Leave the trigger on this channel with positive slope.
b)
Close switch
Two goes low.
time delay before Channel Two goes low.
the setting of the "DURATION TIMER" which can be increased by
turning potentiometer P8 clockwise.
The logic
of
voltage
until the continuity tester indicates that the main output
V T
contacts are closed.
and open switch Sl.
the oscilloscope does not go low at any time.
INTRODUCTION
The relay should be mounted on a vertical surface.
and panel drilling diagram is shown in Figure 22.
The location should be clean,
vibration and well lighted to facilitate inspection and testing.
internal
The
3.
Figures 2 and
SURGE GROUND AND RELAY CASE GROUND CONNECTIONS
One
of
the
connected
to
ground
copper wire or its equivalent.
relay case.
In addition, Terminal 10 designated as "surge ground" on
the internal connections diagram must be tied to ground for the surge
suppression
networks in
ground
lead
should
protection
from
solid ground connection) .
With Terminal 10 connected to ground, "surge ground" is connected
electrically to the relay case.
GEK-49861
shifter
until
Sl and
slowly
check
the
"DURATION
Sl and
slowly
Alternately raise and lower
the
MOB
function can
Reduce
V T
Close switch Sl and observe that Channel Two of
INSTALLATION PROCEDURE
connection
diagrams
Typical external connections are shown in Figure 4.
mounting
studs
by
a
conductor
This connection is made to ground the
the
relay
be
as
short
surges
(preferably
the
phase
reduce voltage
TIMER"
setting,
reduce
voltage
then
be checked
to approximately 80% of this voltage
dry,
free from dust or excessive
for
the
or
screws
should
not
less
than
to perform properly.
as
possible
ten
inches
The purpose of this connection is to
25
angles
meter
until
Channel
V T
the
following
until
Channel
V T
and observe the
V T
This time delay is
by
lowering
The outline
relays
are
shown
be
permanently
No.
12 AWG gage
This
to
ensure
maximum
or
less
to
reach
reads
This
in
surge
a
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