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PERIODIC TESTING AND ROUTINE MAINTENANCE
In v i ew of
o f
a
pow e r
s y s t em
f o l lowed .
I t
i s
w i l l
va ry
depe nd i ng
e x pe r i e nce
w i t h
e nough
expe r i e nce
i nd i v i dua l
r equ i r emen t s
INSTALLATION PROCEDURE
ye a r s .
Check
t h e
INSP ECTION
and
s i g n s of ov e r he a t i ng,
conn e c t ions
a r e
co l l apsed .
CONTACTS
Exam i ne the con t ac t s
i n s u la t i ng f i lms .
s hou l d be u s e d .
e t ch - roughened s u r fa ce
po l i s h i ng
a c t ion
w i l l c l ea n o f f any co r ros ion t ho r oug h l y and r ap i d l y .
e n s u r e s
t h e
c l ea n i ng
k n i v e s,
f i l e s ,
con t a c t s .
Remove ALL powe r
o f
t he pr i nted c i r cu i t boa r ds .
may result i n damage to and/or mi sope r a t ion o f the r e lay .
ELECTRICAL TESTS
The
r each
s hou l d
be
r epea t ed
s e t t i ng .
If
me a s u r ed
a t
a
t ha t
t he
r e l ay
equ i pme n t a r e o f t e n add i t i v e and t he tot a l e r r o r o f t he p r e s e n t s e t up
may b e o f oppos i t e s i g n f rom the e r r o r at the p r e v ious pe r iod i c t e s t .
I n s t ea d
o f
r eadju s t i ng
appa r e n t
e r r o r
e r r o r be no t e d o n t h e r e l ay t e s t
ha s a c c umu l a t ed,
i n t h e s e t t i ng a r e due to r a ndom va r i a t ions i n t h e t e s t cond i t i o n s o r
a r e d ue t o a one - t ime d r i f t i n the cha r a c t e r i s t i c s o f t h e r e l a y .
GE K-49861
the
v i t a l
r
1 l e of
i t
is
i mpo r t a n t
r e cog n i zed that the i n t e r va l b e t w e e n pe r i od i c chec k s
upon
e n v i ronme nt,
pe r i od i c
t e s t i ng .
to
s e l e c t
the
i t
i s
be
checked a t
i t ems
de s c r ibed
MECHANICAL
INSPECTION .
de t e r i o r a t i on o r othe r damag e .
t i g h t
by
obs e r v i ng
for pi t s,
Fo r
c l ea n i ng con t a c t s,
Th i s cons i s t s of a
r e s emb l i ng,
is
so
de l i c a t e
of
the
a c t u a l
ab r a s i ve
pape r
f r om the r e lay before r emov i ng or
t e s t s
d e s c r ibed
and
the
the
mea s u r e d
value
p r e v ious
t ime ,
shou l d
be
r eadjus ted .
the
r e lay
i s
acceptab l e,
i t w i l l become
pro t e c t i ve
r e l a y s
that
a
pe r iod i c
t ype o f
U n t i l
the
t e s t
i n t e r v a l
sugg e s t ed t h a t
the po i n t s
an
i n t e r va l of
unde r
ACCEPTANCE
Exam i ne
tha t
t h e
a r c or bu r n ma r k s,
a
f l e x i b l e bu r n i s h i ng
f l ex ib l e
i n e f f e c t ,
that
no
s c r a t c h e s
po i n t s
of
o r
c lo t h
o f
any
CAUTION
Fa i lu r e
to obs e r ve
unde r
the
ACCEPTANCE
r e s u l t s
compa r ed
i s
s l i g h t l y
t h i s
i s
not
nece s s a r i l y
The
e r r o r s
i t
i s
r e commended
no
adju s tme n t
r e co r d .
Af t e r s u ff i c i e n t
appa r e n t whe t h e r
27
i n
t h e ope r a t ion
t e s t
p r og r am
r e l a y
a nd
t h e
u s e r
has
ac cumu l a t ed
be s t
s u i t e d
l i s t ed u nde r
f r om one
TESTS
each
compo n e n t
Check
t h a t
lockwa s h e r s
a r e
co r r os ion,
s t r i p of
me t a l w i t h a n
a s upe r f i ne
f i l e .
a r e
l e f t,
I t s f l e x i b i l i t y
con ta c t .
Do
k i nd
t o
c l ea n
i n s e r t i ng any
t h i s
caut ion
TEST
aga i n s t
the
d i ffe r e n t
f r om
a n
i nd i c a t ion
of
a l l
t h e
t h a t,
be
made
a nd
t h a t
t e s t
t h e me a s u r e d e r r o r s
b e
u s e r ' s
to
h i s
to
t wo
VISUAL
f o r
a l l
f u l l y
a nd
too l
The
y e t
i t
no t
u s e
r e l ay
s e c tion
de s i r ed
t h a t
t e s t
i f
t h e
t h e
d a t a
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