T Y P E S CA- 1 6 AND CA-26 R ELAYS
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M A X I M U M
TOT,...L CuRRENT FLOW�N&
TH.tOUGH THE DtFf'f.RENI/AL ZoNE Fo� AN EXTERIV"tL FAUt.T.
SET PiCKuP £quPL. To MAX I �I.UM ToTAL Cu�R'E.NT FLow uJ&
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606B269
Fig.
1 0 .
External Schematic o f the Type
CA-26
Relay for Transformer Protection a n d B u s Protection
stud and then turning the proper nut with a wrench.
For detailed FT case information, refer to L L . 4 1-
076.
AD J U S TM E N T S AN D M A I N T E N AN C E
The proper adjustment s to insure correct operation
of this relay have been made at the factory. Upon
receipt of the rel ay, no customer adjustments other
than those covered under "SETTINGS" should be
required.
Ac c e p t a n c e C h ec k
The following check i s recommended t o insure
that the relay is in proper working ord er.
A . M i n i ll'l um T r i p C ur r e n t
Apply current to terminals 12 and 1 3 of the relay.
The relay should operate as follows:
1. CA- 16
0. 15 ampen�s
±
5%
2. CA- 26
1. 25 amperes
±
5%
B . P e r c e n to g e D i f f e re n t i o
I
C h or a c t e r i st i c
*
Apply 16 amperes to terminals 9 and 1 9 of the
CA-16 relay or 14 amperes to terminals 9 and 1 9 of
the CA-26 relay. The contacts should close when
the followin g operating current is applied to the
relay with connections of Fig. 1 1 .
CA- 16
17.0
±
7o/c amperes
CA- 26
38 . 0
-±
7o/c amp eres
Check each individual restraint winding by apply
ing 50 amperes
to
each winding. Apply sufficient
op erating current to the operating c ircuit until th e
contacts j ust close. The operating current _should be:
CA- 16
3 . 9 to 5 . 1 Amperes
CA- 26
1 5 . 8 to 18. 2 Amperes
C.
T ime
C urve
Apply
20
amperes
to
terminals
12
and
13
of
the
re
lays.
The contacts should close in the follo Wing
t
i
m
e
s
:
7
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