max
cos
max
P
ArgLd
a
S
=
æ
ö
ç
÷
è
ø
EQUATION1623 V1 EN-US
(Equation 249)
where:
Pmax
is the maximal active power transfer during emergency conditions and
Smax
is the maximal apparent power transfer during emergency conditions.
The
RLd can be calculated according to equation
:
cos(
)
RLd
ZLoad
ArgLd
=
×
EQUATION1624 V1 EN-US
(Equation 250)
The setting of
RLd and ArgLd is by default set to 80 ohm/phase and 20 degrees. Those values
must be adapted to the specific application.
7.9
Distance protection zone, quadrilateral characteristic,
separate settings ZMRPDIS, ZMRAPDIS and ZDRDIR
GUID-7308DB86-32CE-4615-95DC-92BEEF69E184 v1
7.9.1
Identification
GUID-420DD49A-C65B-4F04-B317-9558DCCE7A52 v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Distance protection zone,
quadrilateral characteristic, separate
settings (zone 1)
ZMRPDIS
S00346 V1 EN-US
21
Distance protection zone,
quadrilateral characteristic, separate
settings (zone 2-5)
ZMRAPDIS
S00346 V1 EN-US
21
GUID-119120A5-8600-44C6-9C85-81136DBBE280 v1
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional impedance quadrilateral
ZDRDIR
Z<->
21D
7.9.2
Application
IP14961-1 v2
GUID-FC735AD1-D8C5-4513-87B3-7313AF09CBB3 v1
Sub-transmission networks are being extended and often become more and more complex,
consisting of a high number of multi-circuit and/or multi terminal lines of very different
lengths. These changes in the network will normally impose more stringent demands on the
fault clearing equipment in order to maintain an unchanged or increased security level of the
power system.
Section 7
1MRK 505 343-UEN B
Impedance protection
266
Application manual
Содержание Relion 670 series
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