ABB RET670 Applications Manual page 386
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Also See for RET670:
- Applications manual (1016 pages) ,
- Commissioning manual (328 pages) ,
- Installation and commissioning manual (240 pages)
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Section 3
IED application
380
ZB
IED
IEC07000014 V2 EN
Figure 169:
Line application of pole slip protection
If the apparent impedance crosses the impedance line ZB – ZA this is the detection
criterion of out of step conditions, see figure 170.
ZA = forward source impedance
Line impedance = ZC
1MRK504116-UUS C
IEC07000014_2_en.vsd
Application manual
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