8.9.1 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
8.9.2 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.
The distance protection function in the IED is designed to meet basic requirements
for application on transmission and sub-transmission lines although it also can be
used on distribution levels.
8.9.2.1 System earthing
GUID-AA9E698B-D0B5-45FC-ABA5-6A2CD988E16D v1
The type of system earthing plays an important role when designing the protection
system. Some hints with respect to distance protection are highlighted below.
Solid earthed networks
GUID-02632014-090D-4D95-B678-6DFC7DE998A7 v1
In solidly earthed systems, the transformer neutrals are connected solidly to earth
without any impedance between the transformer neutral and earth.
Section 8 1MRK 506 369-UEN B
Impedance protection
290 Line distance protection REL670 2.2 IEC
Application manual
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