GEK-49950
ACCEPTANCE TESTS
I mmedi atel y u pon recei pt of the relay an IN SPECTION AND A CCE PTAN CE TE ST sh oul d b e
made to mak e su re that n o damage has b een sustai ned i n s h i pment and that the rel ay
cal ib rations have not b een d istu rb ed. I f the ex a m i n atio n o r test i n d i cates t h at
readjustment is necessary, refer to the section on SE RV ICING.
These tests may be performed as acceptance tests or as part of the i nstall ation tests, at the
discretion of the user. Since most operating compan ies use different p rocedu res fo r
acceptance and for i nstallation tests, the follow ing section includes all appl i cable tests that
may b e performed on these rel ays.
VISUAL IN SPE CTION
Check the name pl ate to mak e su re that the model nu mb er and rati ng of the relay a g ree
with the requ isition.
Remove the relay from its case and check that there are no b roken o r crack ed parts or a n y
oth e r si gns o f physical damage.
MECH AN ICAL IN SPE CTION
1. The re should b e no noticeable friction w hen the d isk is rotated slowly clock w ise.
The disk should retu rn by itself to its rest position.
2. M ake su re the control spring is not deformed, nor its convolutions tangl ed o r
touching each other.
3. The armatu re and contacts of the seal -i n u n it, as w ell as the a rm atu re a n d
contacts o f the instantaneous u n it, should move freel y w hen operated b y hand;
the re should b e at l east 1/64-inch w i pe on the seal- i n and the insta nta n e ou s
contacts.
4. T h e targets i n the seal- i n u nit and i n the i nstantaneous u n it must come i nto view
and l atch w hen the a rmatu res are operated b y hand, and should u nl atch w hen
the target rel ease button is operated.
5. M ak e su re that the b rush es and sho rti ng b a rs ag ree w ith the i nternal -con n ections
d iag ram.
CAUTION:
Should there b e a need to tig hten any screws, to p revent stri pping, D O
N OT OVE R TIGHTEN .
D RAW OUT RE L AY TESTING
I FC rel ays may b e tested w ithout removi ng them from the panel b y usi n g either the
1 2 X CA2 8A 1 or 1 2 X CA 11 A 1 test probes. The test prob es mak e con nections to b oth the
rel ay a n d the external ci rcu itry, w h ich p rovides max i mu m fl ex ib il ity but requ i res
reasonable care since a CT shorti ng ju mper is necessary w h en testing the rel ay. The test
p rob es a re different i n the nu mber of con nections that can b e mad e. The 1 2 X CA2 8A 1 has
a full compl ement of 2 8 con nections and the 1 2 XCA 11A 1 has fou r. Refer to i nstru ction
b ook GEK -49803 for additional information.
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