Siemens siprotec SJ62 User Manual page 271

2 Functions
269
Note
The three-phase voltage protection with phase-to-phase quantities (measured or cal-
culated) offers a special behavior for phase-selective pickup messages since the
phase-selective pickup message "Flx01 Pickup ABC" is assigned to the corresponding
measured value channel "abc".
Single-phase faults:
If, for example,the voltage V
V fall below their thresholds, the device will report the messages "Flx01 Pickup A"
CA
and "Flx01 Pickup C" since the undershooting was detected on the first and third mea-
sured value channel.
Two-phase faults:
If, for example, voltage V
the device will report the pickup signal "Flx01 Pickup A" since the undershooting was
detected on the first measured value channel.
Note
In three-phase voltage protection, the configured voltage threshold is always interpret-
ed as phase-to-phase quantity. This applies also if a phase-to-ground system is con-
nected in 213 VT Connect. 3ph (Power System Data 1) and the parameter
VOLTAGE SYSTEM of the flexible function also evaluates the phase-to-ground system.
collapses to such an extent that the voltages V
A
collapses to such an extent that it falls below its threshold,
AB
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
and
AB