ABB CIRCUIT SHIELD 87T - Page 8

Transformer
Differential
Relay
IB
7.6
.
1.7
-
4
Page
8
Connections
shown
for
Phase
Rotation
a
-
b
-
c
Connections
shown
for
Phase
Rotation
a
-
b
-
c
Delta
-
Wye
Transformer
Delta
-
Delta
Transformer
b
a
c
b
a
c
52
-
1
52
-
1
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Control
Power
ft
5
f
r
~
r
.
86
86
X
X
52
-
2
86
52
-
1
a
a
^
86
52
-
1
52
-
2
TC
TC
+
Typical
Connections
for
Differential
Protection
Two
-
Winding
Three
-
Phase
Power
Transformer
Figure
3
:
Note
:
using
the
transformer
nameplate
drawing
as
a
reference
,
a
"
phasing
-
check
"
should
be
made
to
insure
that
the
ct
secondary
connections
are
made
up
properly
for
the
particular
transformer
winding
configuration
.
Courtesy of NationalSwitchgear.com