ABB REB670 Applications Manual page 247
Busbar protection 2.1 ansi, relion 670 series
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Also See for REB670:
- Applications manual (554 pages) ,
- Commissioning manual (196 pages) ,
- Operator's manual (116 pages)
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1MRK 505 337-UUS -
Application manual
the faulty phase will be connected to ground. The residual overvoltage will be three times
the phase-to-ground voltage. See figure 100.
ANSI07000190 V1 EN
Figure 100:
Ground fault in Non-effectively grounded systems
Voltage protection
ANSI07000190-1-en.vsd
Section 8
241
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