....
....
POWER
':"lAMS FORMER
H I GH
S I DE
LOW
S I DE
DEVICE NUMBER CHUT
B7----PERCEIIITAGE 0 I FF. RELAY TYPE CA-26
OP-OPERATIIG C O I L
1
R·PAIREO RESTRA INT CO I L
( B0TTOI4 R . H .ELEM)
S-PAI RED RESTRA I N T COH
IM
( TOP L.H, ELDI)
T-PA I RED RESTRAIIT COIL
���6
(TOP R . H, ELDI)
ICS-I IIIO I CATI•G CONT' SW
I I T-IND• IMST. TR I P
86----AlJX ,Tfi i PP I MG REUY TYPE Wl
t-USE WHERE I NTERNAL CURRENT CAN
EXCEED TWICE TttE EXTERNAL FAUlT
CURRENT·
SET P I CK-UP EQUAL
TO
MAXIMUM EXTERNAL FAULT CURRENT.
'>--,
\1
3
A
c
AUX' CURREMT
}
BALAMCE
CURRENT TRAitS.
87
i9
�
7
87
87
8
'
12
PHASE 2
( SAME AS PH . ! )
�
!!!
15
POS.
---,----
--1
' "
86
-,-
9 10
T
I
I
I
I
l
+
2
I CS
�
PH.
PH.
3
J
TO
BREAKER:
TR I P
.COILS
NEG.
6!?
19
5
9
18
�
8
87
i2
PHASE
3
(SAME AS PH . ! )
17
87
N
87
-l<
Fi g.
14.
External Schematic of the Type
CA -26
Relay for Wy e- Wye-De lta Transformer Protect ion .
4 08C 507
-t
-<
"'tt
m
(1\
n
�
.....
a..
,..
z
c
n
,..
�
a..
;;:o
m
r
,..
-<
(1\
;--
r
...
w
w
:-'
w
.,
www
. ElectricalPartManuals
. com
