Time-Overcurrent Unit; Instantaneous Unit; Target And Seal-In Unit; Contact Cleaning - GE IAC Series Instruction Booklet

These tests
dev i ated f rom the ir original sett i ng.
the relay must be retested and serv i ced as descr i bed i n th i s manual.

TIME-OVERCURRENT UNIT

Perf orm P i ckup test as descr ibed
1.
the tap i n serv i ce.
2. Per f o r m the T ime Tests as descr i bed i n the

INSTANTANEOUS UNIT

1.
Check that the Instantaneous U n i t picks up at the desired cur rent
level, as outli ned in the

TARGET AND SEAL-IN UNIT

1 . Check that the un i t picks u p at the values shown i n Table XII .
Check that the un i ts drops out at 30% or more of tap value.
2.
CONTACT CLEANI NG
For clean i ng relay co ntacts ,
used. Th i s consists
roughened surf ace,
polish i ng act i o n
w i ll clean o f f any corros i o n thoroughly and rap i dly.
ensures the clean i ng
k n i ves, f iles,
contacts.

SYSTEM TEST

Although this
set the IAC relay,
operat i o n are
exper ience.
TIME-OVERCURRENT UNIT
If it is f ou nd dur i ng i nstallat i on or per i od i c testi ng
t ime-overcu rrent un it
as f ollows:
The p i ckup o f the u n i t f or any current tap
o f a spr i ng-ad just i ng ri ng.
screw dr i ver i n the
the operat i ng current of
the tap sett i ng
been d ist rubed.
GEK-34054
are i ntended to make sure
ACCEPTANCE TESTS
o f a f le x i ble
resembli ng
is so delicate that no
o f t he actual po i nts
abrasi v e paper or
Instruction Book
overall functional
recommended at

SERVICING

is out of
The
notches around the
the u n i t may be bought
employed i f, f or
This adjustment
that
I f deviations are encountered,
i n the
INSTALLATION
INSTALLATION
sect i o n.
a f lex ible burnishing tool should be
strip o f
i n e f f ect a super f i ne
scratched
o f contact.
cloth of any
primarily written to check a nd
is
tests to
i ntervals based
l i m i ts, the unit may be recal i brated
r i ng may be turned by
edge.
some reason,
also perm i ts
16
' t he relays have
secti on
secti o n.
metal w i th an etch­
f ile.
are left, yet is
Its f lexibi l i ty
Do not
k i nd to clean relay
check the system
on the customer's
that the
is adjusted by means
i nserti ng a
By turn i ng the r i ng,
i nto agreement w ith
th i s adjustment
any des i red sett i ng
not
f or
The
use
has