T YPES CA-16 AND CA-26 RE LA YS
TO
6RE,I>.,'\Eii(
TO!: I P
(OILS
Bi 87
IT 14
87
"
DEVIC.E "'-luMSER :::.-..._ll!l
57- Pe.RCENT�to..Ge. J, n:e.R�NTI._\.. Re......._'f , TYPi CA..-'C�
1(5 -
I N D I C/'..TING,
CoNTA.<-T
Swi";C.�}
c p -
OPERA.
Tit-!(:, COIL
>;(
- RE.STRf>,.INT
(Oil.
I N
(Borro�
R H. ELEMENT)
�vPE
5 - REST�"'-' NT Co.�.-
C�>..-Z�
(ToP
L k
Et.Er-t1E."'"T)
RE_�>.Y
T
-
ResT,t...I'-JT Co11.
(ToP < H Eu�:MENT)
86
-
,l>._uX.I L..I .O..RY
TR.iOPiN ..
REL"'-'1',
TY=Ii
W i...
606B269
*
Fi g. 10. External Schematic of the Type CA-26 R elay for Transformer Protection and Bus Protection
the rear mounting stud or studs for projection mount
ing. Either a mounting stud or the mounting screws
may be utilized for grounding the relay. The elec
trical connections may be made directly to the ter
minals by means of screws for ste0l p anel mounting
or to the terminal studs furnished with the relay fo r
thick p anel mounting. The terminal studs may b e
easily removed or inserted by l ocking two nuts on the
stud and then turning the p roper nut with a wrench.
For detailed FT case information. refer to i. L . 4 1-
076.
A D J U S T M E N T S A N D M A I N T E N A N C E
The proper adjustments to insure correct operatio n
of this relay have been made at the factory . Upon
receipt of the relay, no customer adjustments o ther
than those covered under "SETTINGS" should b e
required.
A c c eptance C h ec k
The following c hec k i s recommended t o insure
that the relay is in proper working order.
A. Minill]um T r ip C u rr ent
Ap ply current to terminals 12 and 13 of the relay .
The relay should operate as follows:
1. CA-16
0. 1
5 amperes
±
5%
2. CA-26
1.
25 amperes
±
5%
B . P e r c entag e D i ffe rent ial C hara c t e r i st i c
Apply 16 amperes to terminals 9 and 19 o f the
CA-16 relay or 14 amperes to terminals 9 and 19 of
the CA-26 relay . The contacts should close when
the following operating current is applied to the
relay with connections of Fig. 11.
CA-16
CA- 26
17. 0
±
7o/c amp eres
3 8 . 0
+
7o/c amperes
Check eac h individual restraint winding by apply
ing
50
amperes to each winding. Apply sufficient
operating current to the operating c ircuit until th e
contacts just close. The operating c urrent should be:
CA- 16
3 . 9 to 5. 1 Amperes
CA- 26
15. 8 to 18 . 2 Amperes
C. T i m e C urve
Apply
20
amperes
to
terminals
12
and
13
of the re
lays. The c ontacts should c lose in the following
times:
7
www
. ElectricalPartManuals
. com
