Time Tests - GE IAC Series Instruction Booklet

Time overcurrent relay
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inte r mediate
between
unit is adjusted at the facto ry to c lose its contacts f rom any time­
dial
position
at
setting.
The unit resets at 80% of the minimum cl osing value.
Rotate the time dial to the No. O time- dial setting and check,
means of a lamp in the ci r cuit, that the contacts just close.
The point at which the contacts
running the stationa ry contact brush
adjusting
screw.
support.
With the contacts just cl osing at No. 0 time-dial setting,
shou l d be sufficient gap between the stationary contact b r us h and
its meta l backing strip to ensu r e approximatel y 1/32" wipe.
Connect
the
frequency
and
more,
with
See Test-Circuit Figure 14.
With the tap p l ug in the 2 amp.
contacts are
the
contacts
±2. 0% of tap amps.
TAP RANGE
0.5 -
4.0
2.0 - 16.0
With the tap
time setting,
check the current required to just move the
from the stop arm.
Table XIV,
which are ±6%
l owe r l imit, check that the movement is not over one-half inch
measured along the periphery of the disk.
TAP RANGE
0.5 -
4.0
2.0 - 16.0

Time Tests

With
the tap plug in the 2 amp tap and
time setting, apply f ive times tap cu r r ent to the relay.
GEK-34054
the
var ious tap settings
a
minimum
curr ent
This
screw
operating-coil
good
wavef o r m,
pure
r esistance load
just open,
adjust the control
within
the
limits
TABLE X I I I
TAP
2 AMP
2 AMP
plug in the 2 amp ta p and the time dial at No.
This current shoul d be within the limits shown in
of
tap amperes.
TABLE XIV
TAP
2 AMP
2 AMP
within
10%
just c l ose can
in or
shou ld
be
held
termina ls
to
a
having
a
voltage
boxes
fo r
tap and the time dial whe r e the
given
in
Table
MINIMUM AMPS
1.96
1.96
I f
the
MINIMUM AMPS
1.88
1.88
the
17
to
be
obtained.
of
the
tap-plug
be adjusted,
by means
of its
out
secu r e l y
in
source
of
the
prope r
of
120
v olts
setting the
current.
spring to
just close
XIII,
which
MAXIMUM AMPS
2.04
2.04
disk away
disk moves at the
MAXIMUM AMPS
2.12
2.12
time
dial at
The
by
by
its
there
or
are
10
( 1 /2'')
No.
5

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