Time-Overcurrent Unit - GE IACS3A Instructions Manual

These t e s t s
de vi a t e d fr om t he ir or ig ina l s e t t i ng.
t h e r e l a y mu s t be ret e s t e d a n d s e r vi ce d a s de s cri be d i n t h i s ma n ua l .
T IME-OVERC URRENT UNIT
1. Pe r for m Pi ckup t e s t a s de s cribe d i n t he
t he t a p i n se rvice .
Pe rfor m t h e T i me Te s t s a s de s cribe d i n t h e
2.
INSTANTANEOUS UNIT
C h e ck t ha t t h e In s t a n t a n e ou s Un i t pi cks u p a t t he de s i re d curre n t
1 .
leve l, a s ou t li ne d i n t he
TARGET AND SEAL-IN UNIT
1 . C he ck t ha t t h e u n i t pi cks u p a t t he va lu e s s hown i n Tabl e XII.
2. C h e ck xha t t he u n it s dr ops out a t
C ONTACT C LEANING
For cl e a n i ng r e l a y con t a ct s ,
u s e d. Th i s con s i s t s
r oug h e n e d s u rface,
pol is h ing a ct i on
will cl e a n off a n y corr os i on t h oroug h l y a n d r a pi dl y.
e n s u re s t h e cle a n i ng
kn ive s , fi l e s , abra s ive
con t a ct s .
SYST EM T EST
Although t h is In s t r uct ion Book i s pr ima ri l y wri t t e n t o che ck a n d
s et th e IAC r e la y,
ope r a ti on are
e xpe r ie n ce .
T IME- OVERC URRENT UNIT
If it i s fou n d duri ng
t i me - ove rcu rre n t u n i t is ou t of l imi t s ,
a s fol lows :
The pi ckup of t he un i t
o f a s pr i ng-a djus t i ng
s cr e w dr ive r i n
t h e ope r a t ing cu r r e n t
t he t a p s e t t i ng
be e n di s t rube d.
GEK-34054
a r e i n t en de d t o make
ACCEPTANCE TESTS
of a fle x i bl e
re s e mbli ng i n
i s s o de li ca t e
of the a ct ua l poi n t s
pa pe r or
overall fun ct i on a l
r ecomme n de d a t
SERVICING
i ns t a l la t i on or pe riodic t e s t i ng
for a n y cur r e n t
ri ng . The r i ng
the n ot ch e s a r ound t he
of the un i t
employe d i f, for
Th i s a dju s t me n t
s u r e t h a t 't h e
If de vi a t i on s a re e n cou n t e r e d,
INSTALLATION
INSTALLATION
s e ct i on .
or mor e of t a p va l ue .
3 0%
a fl e x i bl e burn i sh i ng t ool s h ou l d be
s t ri p of me t a l
e ffect a s u pe r fi ne
t h a t n o s cr a t ch e d a r e
of con t a ct .
cl oth of a n y k i n d
t e s t s t o
i nt e rva ls ba s e d
t h e u n it
t a p i s a d ju s t e d by mea n s
may be t u r ne d by i n s e r t i n g
e dg e . By t u rn i ng
ma y be boug ht
s ome rea s on ,
a l s o pe r mi t s
16
r e l a ys h a ve
s e ct i on
s e ct i on .
wi t h a n e t ch ­
fi l e .
l eft , ye t
It s fl e x i bi li t y
Do n ot
t o cl e a n r e l a y
check t h e s ys t em
on t h e cu s t omer's
t h a t
ma y be re ca libra t e d
t he ring ,
in t o a g re e me n t wi t h
t h i s a dju s t me n t
a n y de s ire d s e t t in g
n ot
for
T he
i s
u s e
t h e
a
h a s