ABB RELION REX640 Technical Manual page 887

1MRS759142 C
REX640
Technical Manual
Table 841: Supported faulted loop phase selection schemes for low-impedance earthed networks
and their influence on the RELEASE_PP monitored data
Element start All loops
A & B & AB Fault
EARTH_FLT
B & C & BC Fault
EARTH_FLT
C & A & CA Fault
EARTH_FLT
Impedance protection zones
DSTPDIS has five flexible and configurable impedance zones Z1..Z5. The number of
active zones has to be selected by setting Select active zones. For example, all five
zones can be set active by selection "All 5 zones" and only zone 1 is activated by "Zone
1". The purpose of this setting is effectively dimming non-active zone settings in
PCM600 or the protection relay's HMI.
Example:
If only zones 1 and 3 should be activated, "Zones 1-3" should be selected and then
zone 2 timers can be disabled or BLOCK_Z2 can be activated to hide zone 2
operations.
Zone Z4
Zone Z3
Zone Z2
Zone Z1
Zone Z5
GUID-6328DB81-8832-48DE-816C-E1899762F281 V2 EN
Figure 476: Zones of DSTPDIS function (example 1)
Ph Prf mode Lo Z GFC
PE only PP only
RELEASE_PP
No fault AB Fault
No fault BC Fault
No fault CA Fault
X
ZL
Section 4
Protection functions
BLK leading PE BLK lagging PE
AB Fault AB Fault
BC Fault BC Fault
CA Fault CA Fault
Under impedance
start charactristics
Load encroachment
area
R
881