ABB RET670 - Page 355

RFPGZm
X1Zm+XNZm
X1Zm+XNZm
RFPGZm
R1Zm+RN
RFPGZm
RFPGZm
R
X
PHS
Zm
90°
R1Zm+RN
X1PHS+XNPHS
X1PHS+XNPHS
RFFwdPGPHS
RFRevPGPHS
loopφ
loopφ
ANSI08000435-1-en.vsd
(Ohm/loop)
1 PHS PHSR PG RN+
(Minimum setting)
0 1
3
PHS PHS
PHS
R PG R PG
RN
-
=
ANSI08000435 V1 EN
Figure 156: Relation between measuring zone and FRPSPDIS (21) characteristic
Reactive reach
The reactive reach in forward direction must as minimum be set to cover the measuring
zone used in the Teleprotection schemes, mostly zone 2. Equation 171 and
equation
172 gives the minimum recommended reactive reach.
These recommendations are valid for both 60 and 90 deg. characteristic angle.
PHS Zm
X1 1.44 X1³ ×
EQUATION1309 V1 EN (Equation 283)
1MRK504116-UUS C Section 3
IED application
349
Application manual