ABB RELION 620 Series Technical Manual page 564
Protection and control
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Also See for RELION 620 Series:
- Technical manual (1220 pages) ,
- Operation manual (152 pages) ,
- Applications manual (90 pages)
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Protection functions
Figure 289: Connection of the current transformers of Type 1. The connected phase
currents and the neutral current have opposite directions at an external earth-fault
situation. Both earthings are inside the area to be protected.
Figure 290: Connection of the current transformers of Type 1. The connected phase
currents and the neutral current have opposite directions at an external earth-fault
situation. Both earthings are outside the area to be protected.
564
1MRS757644 H
620 series
Technical Manual
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