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PROBLEM
III. Relay will not
pick up when i t
should on phase
BC, but picks up
correctly on
phases AB and
CA (Type SLY81B
only).
Relay will not
IV.
pick up when it
should on one
phase, but picks
up correctly on
another phase.
v .
±
Out of specifi-
cation in maximum
reach
30° tests.
It
i s
r ecommended t h a t s u f f i c i en t qua n t i t i e s of
ca r r i ed
in
s tock
wo r n, b r ok e n, o r damaged .
Sho u l d
a
r ecommended t h a t t h i s ca r d be
( s e e
F i g u r e
2 1 )
f rom
t he i r
soc k e t s a n d t h i s
I n mos t
i ns tances,
t o
s e r v i ce
a s
r ep r e s e n t s
t h e
f au l ty
ca r d
can
r ep l ac eme n t .
G E K-49861
TABLE XVIII
( Con t i nued )
TROUBLESHOOTING PROCEDURE
PROBABLE CAUSE
1 .
110SB 11 plug
SP card i n
position.
1.
Overcurrent super-
vision sensitivi ty
set too hi gh.
2.
Defective card.
1 .
Incorrect steady
state pickup time
on IT card.
2.
Defective card
RENEWAL PARTS
to
e nab l e
the
p r i n t e d
c i r c u i t
r eplaced w i t h a spa r e .
i s
ava i l ab l e
for
too l
t h e u s e r
w i l l be a nx ious
soon
a s
pos s ib l e
mos t
exped i t ious
then
be
r e t u r ned
TROUBLESHOOTING SEQUENCE
on the
1.
Place 11 0SB 11 plug in the
the "IN11
110UP pos i t i on for reach
tests.
1.
Turn sensitivity potentio-
meter, on SP card for the
inoperative phase (P2 for
phase AB, P4 for phase BC
or P6 for phase CA) fully
counterclockwi se.
2.
Change printed circu i t
cards, one at a time, in
the following order :
CL, SP, CP, OS.
1.
Set steady state pickup
time pot and recheck other
phases.
2.
Change pri nted c i rcu i t
cards, one at a t i me, i n
the following order ; SP,
CP, IT, CL, OS.
prompt
r eplac eme n t
c a r d
b e com e
i nope r a t i v e,
r emov i ng
the p r i n t ed
s hou l d a lways b e u s ed
to
and
the
i n s e r t ion
means
o f
accomp l i sh i ng
to
t h e
f a c to r y
29
IT,
r enewa l pa r t s be
of
any
that
i t
A spec i a l too l
c i r cu i t
f o r
r emova l .
r e t u r n
t h e
equ i pm e n t
o f
a
s pa r e
t h i s .
fo r
r epa i r
a r e
i s
c a r d s
c a r d
The
o r
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