Full Scheme Measurement - ABB REL650 series Technical Manual

1MRK 506 335-UUS A
6.1.6.2
Technical manual
I3P
PRECALCULATION
V3P
ANSI11000271 V2 EN
Figure 30: ZQMPDIS logic diagram

Full scheme measurement

The execution of the different fault loops within the IED are of full scheme type, which
means that each fault loop for phase-to-ground faults and phase-to-phase faults for
forward and reverse faults are executed in parallel.
Figure 31 presents an outline of the different measuring loops for the five, impedance-
measuring zones.
I Comp
ZONE-1
V Pol
ZONE-2
ZONE-3
ZONE-4
ZONE-5
Section 6
Impedance protection
RELE
START
ASE
RELEASE
TRIP
LOGIC LOGI
C
ANSI11000271-2-en.vsd
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