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ABB Relion 670 series - Page 354

ABB Relion 670 series
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R
jX
LdAngle
LdAngle
RLdOutFw
RLdInFw
R1FInFw
R1FInRv
RLdInRv
RLdOutRv
X1InFw
X1OutFw
ZL
R1LIn
X1InRv
X1OutRv
ANSI05000175-2-en.vsd
DFw
j
j
j
DRv
DRv
DRv
DRv
DRv
DFw
DFw
DFw
DFw
DFw
ANSI05000175 V2 EN
Figure 184: Operating characteristic for ZMRPSB (68) function (setting parameters
in italic)
The impedance measurement within ZMRPSB (68) function is performed by solving
equation 72 and equation 73 (Typical equations are for phase A, similar equations are
applicable for phases B and C).
Re
A
A
V
Rset
I
æ ö
£
ç ÷
è ø
EQUATION1557 V1 EN (Equation 72)
Im
A
A
V
Xset
I
æ ö
£
ç ÷
è ø
EQUATION1558 V1 EN (Equation 73)
The R
set
and X
set
are R and X boundaries.
Section 6 1MRK505222-UUS C
Impedance protection
348
Technical reference manual

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