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The
f ollowing
installation.
T IME -OVERCURRENT UNIT
l .
Set tap screw on desi red tap.
1 4,
apply
appr oximately
close.
Reduce
contacts begins to f l icke r.
pickup and shoul d be within 5% of tap value.
* 2.
Check the operating time at Time Dial
value,
and I
the time s hown on the time-cu r rent cu r ve ± 7 % .
TARGET AND SEAL- IN UNIT
1.
Make sure that the tap screw is in the des i r ed tap.
2.
Perform p i ckup
TEST
section.
I NSTANTANEOUS UNIT
1.
Select the desired r ange by making the p r oper connections at the
rear of
the
possible,
be
higher conti nuous rating.
2.
Set
the
instantaneous
level.
See
TEST
section.
All
the
tests
pe r formed at the time of installation.
described under the
i ns tallation,
to
t i me.
PERIODIC CHECKS AND ROUTINE MAINTENANCE
In
view of the vital
of
a powe r
system,
f ollowed.
It is recognized that the inte r val between pe r iodic checks
will
vary
depend i ng
expe rience
with
enough
expe rience
individual requir ements ,
be checked at an inter val of f r om one to two yea rs.
Indicates revision
*
GEK-34054
INSTALLATION
tests
a r e
to
twice
the cu r r ent
5 times tap cu r r ent.
=
and
d r opout tests ,
r el ay
( See
Internal -Connections
sure
to
select
unit
SETT ING
THE
I NSTANTANEOUS
described
above
ACCEPTANCE TESTS
it
is
r ecommended
role of p r otecti ve
it is
impo rtant that a pe riodic test p r og r am be
upon
envir onment,
periodic
testing.
to
select
the
it is suggested that the points l is te d bel ow
be
pe rfo r med
Using the test ci rcuit in Figu r e
tap
value
until
until
the light
This value of cu r rent is defined as
5, Tap
=
The oper ating time should be
as
outlined
the
higher
range,
to
pick
up
at
UNIT,
unde r
Installation
In addition,
section were not perfo r med p rio r
that
they
be
relays
type
of
r el ay
Until
the
user
test
inter val
1 5
at
the
time
contacts
in series
with
2 o r minimum tap
=
in the
ACCEPTANCE
Diagr am) .
Wheneve r
s ince
it
has
the
desired
cu r rent
in
the
ACCEPTANCE
Tests
must
if those tests
pe r for med
at
in
the ope r ation
and
the
use r 's
has
accumulate d
best
sui ted
to
o f
j
ust
the
a
be
this
his
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