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GEI-83910
Usinq the test connections shown in Figure 9, the unit should pick up and
close the
normally~~open
(left) contacts <it a value of current!: ' J % of trw minimulil
',;h,wiI1 on the nameplate for thi'; unit,
A neon light is Y"(;comm('nriecJ to
indicttU;
contitct.
CiOSIll'P,
and the GD unit must be held in the normally-closed I'0.,ition Lu
obtain irldication of G1 contact closure (see Figures 9 and 13).
With the tap plugs in the lower tap range, and using the connections shown in
Figure 9, the unit should pick up (close the right-hand contacts) at a value
±
5%
of the minimum value shown on the nameplate for this unit.
Bottom-Unit Pickup (GD)
Using the test connections shown in Figure 9, the unit should pick up (close
the left-hand contacts) at
0.5
ampere
±5%.
Bottom-Unit-Core Check (GD)
a.
Check the position of the notch that indicates the position of the flat on the
core.
This notch should be pOinting to the front right-hand corner of the
unit, front view.
b.
Short ci rcu it termi na 1 s 7 and 8; connect the re 1 ay as shown in part A of
Figure 11.
c.
Adjust
10
operate.
operate.
for
0.25
amp and Ip for
100
amps and check that the unit does not
If
the unit operates,
adjust the core until, the unit does
not
NOTE:
DO
NOT
KEEP
THE
100
AMPS ON THE
CIRCUIT
FOR MORE
TIME
THAN NECESSARY, TO AVOID OVERHEATING THE COILS.
d.
Open the polarizing circuit, adjust
10
for 7 amps, and check that the unit
does not operate.
If the unit operates, adjust the core for no operation and
repeat the test, starting at b.
e.
Unshort terminals 7 and 8 and connect as shown in part B of Figure 11.
f.
Set
10
for
0.25
amperes and Vp for
120
volts, and check that the unit does
not
operate.
If the unit operates, adjust the core for no operation and repeat
the tests, starting at b.
GD1X Unit Pickup
USing the test connections shown in Figure
10,
the unit should pick up at a
value of
80%
or less of the voltage shown on the nameplate.
The G1 normally-open
contact must be held closed during this test (see Figures
10
and 13).
11
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