56
3 zone impedance protection (Z(n)RW)
&KDSWHU
/LQHLPSHGDQFH
]RQHLPSHGDQFHSURWHFWLRQ=Q5:
$SSOLFDWLRQ
The impedance protection, ZnRW is intended for single-phase and two-phase systems.
The protection is a full-scheme distance protection with three impedance zones and
with individual measuring elements for all fault types. Each zone has a quadrilateral
characteristic (see figure 29). The characteristics have individual settings for the resis-
tive and reactive reaches for all measurement zones. Z
L
represents the protected line.
)LJXUH &KDUDFWHULVWLFVIRUWZRSKDVHWRSKDVHLPSHGDQFHPHDVXULQJ]RQHV
en02000636.vsd
R
jX
25
o
81
o
Z
L
RFPP
1
X
ArgDir
1
RFPP
2
ArgLd
X
2
Summary of Contents for REO 517
Page 10: ... RQWHQWV ...
Page 16: ...6 Introduction to the application manual KDSWHU QWURGXFWLRQ ...
Page 64: ...54 Blocking of signals during test KDSWHU RPPRQ IXQFWLRQV ...
Page 88: ...78 Scheme communication logic ZCOM KDSWHU LQH LPSHGDQFH ...
Page 146: ...136 Unbalance protection for capacitor banks TOCC KDSWHU XUUHQW ...
Page 166: ...156 Dead line detection DLD KDSWHU 3RZHU V VWHP VXSHUYLVLRQ ...
Page 378: ...368 Monitoring of DC analog measurements KDSWHU 0RQLWRULQJ ...
Page 384: ...374 Pulse counter logic PC KDSWHU 0HWHULQJ ...
Page 412: ...402 Serial communication modules SCM KDSWHU DWD FRPPXQLFDWLRQ ...
Page 440: ...430 LED indication module KDSWHU DUGZDUH PRGXOHV ...