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Immed i a te l y upo n rece i p t o f t h e rel ay, an INSPECTION AND ACCEPTAN CE TEST s h o u l d be
mad e to make s u re t h a t n o damage h a s bee n s u s ta i n ed i n s h i pment a nd t h a t t h e re l ay
ca l i bra t i on s have n o t been d i s tu rbed.
rea dju s tment i s nece s s a ry, re fe r to t h e sect i on o n
When Hipotting the SBC, remove all external w1r1ng from Tenninal 10.
not Hipot Terminal
600
VDC and the hipot voltage may damage the capacitors.
These tests may be pe r fo rmed a s part o f e i t h e r t h e i n s ta l l a t i o n o r the accepta nce
te s ts, at the d i sc re t i o n o f the u s er.
procedu re s fo r accepta nce a nd i n s ta l l a t i o n tes ts, the fo l l owi n g sect i o n i ncl u des a l l
appp l i cabl e te s ts tha t may be perfo rmed o n these rel ays.
Sett i n g or check i n g a l l S B C r.el ays co ns i s t s o f t h e fo l l owi n g tes ts, a nd these tests
mu s t be per fo rmed in the fo l l ow i n g o rd e r.
FILL-IN TIMER SETTING
The fi l l - i n t i me r i s e s s e n t i a l l y a n adju s tabl e d ropo u t t i me r wh i ch i s facto ry s e t to
8.7 mi l l i s econds.
bu t l owe r i n g th e fi l l - i n t i me ra i s e s t h e p i ckup l evel
F i gu re 10.
As a n exampl e, i f the fi l l - i n t i me o f 5 mi l l i s eco nds i s requ i red and
s e t, then the 5 m i l l i s eco nd fi l l - i n p i ckup l ev e l i s approx i ma te l y 1. 2 4 t i mes the 8.7
mi l l i seco nd
s e tt i n g.
sect i on fo r o t h e r pa rame te rs.)
CHARACTERISTICS
The t i mer and i ts a s soci a ted adju stme n t pote n t i ome t e r a re l oca ted on the 1 1 A 1 1 ca rd
( l e ft-h a nd ca rd, see F i g u re s 14, 15 , 16 ) .
34 and per fo rm the fo l l ow i n g i n s t ruct i o n s:
I.
Appl y ra ted DC to rel ay te rm i na l s 17 (+ ) a nd 18(- ) .
2 .
Make s u re t h a t t h e rel ay c i rcu i t cu rre n t s a re ze ro, by remo v i n g the l o we r
co n n ect i on bl ock.
3.
Make
the osci l l oscope a nd
certa i n to obs e rv e the caut i on tha t t h e
Open i n g the n o rma l l y-ope n co n tact
i npu t, a nd t h ereby a l l ows for fi l l - i n t i mer mea s u reme n t.
Pl ace the scope i n a n exte rna l t r i gg e r i n g mod e w i th n ega t i v e s l ope a nd no te t h a t
upon open i n g the depre s s ed norma l l y-open co n tact, a po s i t i ve s i g n a l goe s t o abo u t
non
vol ts i n abo u t 8.5 - 9. 00 m i l l i second s.
g rea ter than th i s ran ge, cor r ect l y s e t the t i me to preci s e l y 8.7 mi l l i s eco nds by
a dju s t i n g t h e po te n t i ome t e r l oca ted i n t h e l o we r co rne r o f t h e nAn ca rd.
ACCEPTANCE TESTS
10.
The reason is that Capacitors C1-C12 are rated for
Other fi l l - i n t i me s, l e s s than 8.7 mi l l i s eco n d s, a re obta i n abl e,
( See
F i g u re
co n tact c i rcu i t s
i n the ci rcu i t removes s i g n a l
GEK-45464
I f the exa mi na t i o n o r te st i nd i ca te that
SERVICING.
CAUTION
S i nce mo s t ope ra t i n g compa n i e s use d i ffe re n t
10
a nd
the
CU RRENT
Set up th e te s t ci rcu i t shown on Fi g u re
d e scr i bed
scope power cord must be ungrounded.
I f the mea s u reme n t i s l e s s t h a n o r
2 1
as s hown on t h e g raph o f
DETE CTOR
pa rt
on
Fi g u re
34,
from the t i me r
Do
o f
the
be i n g
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