Functional Test For The Phase-Rotation Direction - Siemens 7SR51 Device Manual

Functional Tests

9.3 Functional Test for the Phase-Rotation Direction

9.3 Functional Test for the Phase-Rotation Direction
NOTE
i
i
Check that the configuration of phase sequence (direction of rotating field) of the device is correct for the
system connections. This can be changed if necessary by the setting of the Phase Rotation parameter in
the CT/VT menu.
The phase sequence can be determined via the Sequence Components measured values instruments. If
normal balanced load analogue signals are applied to the device the value of applied current and voltage
should be shown as positive sequence values with negligible negative sequence components. If the value is
displayed as negative-sequence values with negligible positive sequence values, the setting parameter Phase
Rotation does not correspond to the supplied signals and connections.
If this parameter is incorrect this will invert the forward and reverse directions of directional protection as well
as affecting any function that utilizes sequence component values.
Voltage
Current
456
ZPS
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
NPS
C53000-G7040-C014-1, Edition 11.2019