Toshiba GRT100 Series Instruction Manual page 28

Transformer protection relay
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A
1
1OC
B
C
A
1
1OCI
B
C
Note: 2OC and 3OC provides the same logic as 1OC. 2OCI and 3OCI provides the same logic as
1OCI.
Figure 2.5.1 Scheme Logic of the Overcurrent Protection
T1OC
t
0
[1OC1]
0.00 - 10.00s
[1OC2]
[1OC3]
[1OC4]
[1OC5]
[1OCI1]
[1OCI2]
[1OCI3]
[1OCI4]
[1OCI5]
 27 
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
&
"ON"
6 F 2 S 0 7 8 9
1OC-1
1OC-2
1OC-3
1OC-4
1OC-5
1OCI-1
1OCI-2
1OCI-3
1OCI-4
1OCI-5

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