Rockwell Automation 865 Differential Protection Relay - Manual (Page 153)

Applications 8-11
865-UM001A-EN-P – July 2009
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5
Figure 8.5 – Typical differential protection of a Dyn11 transformer using Allen-Bradley 865 Relay
(Primary and Secondary Current Transformers connected according to Subtractive Polarity)
Settings:
ConnGrp Dy11
IoCmps OFF
I’oCmps ON
Un
High side voltage
U’n Low side voltage
Protection of a
Dyn11 Transformer