GEK-34054
INSTALLATION
The
followi ng
t e s t s
a r e
t o be
pe r for me d a t
t he
t ime
of
i ns t alla t ion.
TIME-OVERCURRENT UNIT
l.
Se t tap s cr e w on des ired t a p.
Us i ng t he t e s t ci r cu i t i n Fi g u r e
14,
a pply a ppr oxima t e ly t wi ce
t a p va lue
u n t i l con t a ct s jus t
close .
Redu ce t he cu r r e nt u n t il t he light in s e r i es wit h t h e
conta ct s beg ins t o flicke r .
This value of cu r r e n t i s define d a s
pi cku p and s h ould be wi t hi n
5 %
o f t a p value .
*2.
Che ck t he ope r a t i ng t ime a t T i me Dia l
=
5,
T a p
=
2
o r minimu m t a p
va lu e, and I
=
5
t ime s tap cu r r en t .
The ope r a t i ng t i me shou ld be
t he t ime s hown on t he t ime-cu r r en t cur ve ±7 % .
TARGET AND SEAL-IN UNIT
1.
Make s u r e t ha t t he t a p s cr e w i s in t he des i r ed t a p.
2.
Pe r for m picku p and dr opout t e s t s , a s out lined in t he
ACCEPTANCE
TEST
s e ct i on .
INSTANTANEOUS UNIT
1.
Select t he de s ir e d r ange by ma ki ng t he pr ope r connect ions a t t he
r ea r of t he r e la y ( See In t e r na l-Connect ions Di ag ra m ) .
Wheneve r
pos s i ble , be s u r e t o select t he highe r range, s ince it has a
hi g he r con t i n uous r a t i ng.
2.
Se t t he in s ta n t a neous unit to pi ck up at t he des i r e d cu r r en t
level.
See SETTING THE INSTANTANEOUS UNIT, in t he
ACCEPTANCE
TEST
sect i on .
All t he t e s t s de s cr ibed above unde r Ins t a lla t i on Tes t s mu s t be
pe r for me d a t t he t ime of ins t a llat ion.
In addi t ion, i f those t e s t s
des cr i bed unde r t he
ACCEPTANCE TESTS
sect i on we r e not pe r for me d pr i o r
t o ins ta lla t ion , it i s r e commended t ha t t hey be pe r fo r me d a t t his
t i me.
PERIODIC CHECKS AND ROUTINE MAINTENANCE
In vie w of t he vi t al r ole of pr ot e ct i ve r e la ys in t he ope r a t ion
of a powe r s ys t em, i t is impor t a n t t ha t a pe r i odi c t e s t pr og r a m be
followed.
It is r e cog ni zed t ha t t he i n t e r va l be t ween pe r io dic checks
wi ll va r y de pendi ng upon envir onment , t ype of r e la y a n d t he u s e r 's
expe r i en ce wi t h pe r iodic t e s t i ng .
Un t i l the u s e r has a ccu mu la t e d
enough expe r ience t o select t he t e s t i n t e r va l be s t s u i t e d t o hi s
indi vi dual requireme n t s , it i s suggested t ha t t he poi n t s li s t e d be low
be che cked a t an int e r val of f r om one t o t wo yea r s .
*
In di ca t e s re vis ion
15
www
. ElectricalPartManuals
. com
