ABB RELION 620 Series Technical Manual page 501

1MAC504801-IB E
620 series ANSI
Technical Manual
Distance characteristics zone definer
This module defines the protection zone characteristics. There are totally five
independently configurable mho zones, whose line reach, angle and directionality can be
set individually for each zone. Each zone can be enabled or disabled individually with the
Operation Znx setting, where x = 1...5. When selected "On", the zone is enabled and
respectively "Off" means zone is disabled. The line reach of zone is defined in primary
ohms.
X
Zone 5
GUID-697BA712-6789-4A8B-A2B6-C29395891C1B V1 EN
Figure 234: Phase distance zones with zones 1 to 4 forward and zone 5 reverse
Protection functions
Zone 3
Zone 2
Zone 1
Section 4
Zone 4
R
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