ABB Relion 670 Series Commissioning Manual page 181
Transformer protection
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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1MRK 504 165-UUS Rev. J
ANSI06000650 V3 EN-US
Figure 48:
Transformer protection RET670
Commissioning manual
3I
3
I
0
ROADir
Characteristic with ROADir restriction
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0
RCADir
0
Trip area
3
V
0
cos
ANSI06000650-3-en.vsd
Testing functionality by secondary injection
V
ref
Section 11
175
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