Setting Notes - Siemens Siprotec 7UM611 Manual

2 Functions
Influence on Pro- Swapping phases with a phase sequence inversion affects exclusively calculation of
tective Functions positive and negative sequence quantities, as well as phase-to-phase voltages by
subtraction of one phase-to-ground voltage from another, so that phase related indi-
cations, fault values, and operating measurement values are not distorted. Thus this
function influences almost all protection functions and some of the monitoring func-
tions (see Section 2.28) which issue an indication if the required and calculated phase
rotations do not match.

2.33.2 Setting Notes

The normal phase sequence is set at 271 (see Subsection 2.3). If, on the system side,
Programming Set-
tings phase rotation is temporarily changed, then this is communicated to the protective
device using the binary input ">Reverse Rot.", FNo. 5145).
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7UM61 Manual
C53000-G1176-C127-3