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Introduction
7UT51 v3
12 PRIM-2330C
SWITCH
-
OFF –
The switch-off of a function means
that the protective function has been established as
Enabled
; however, the function is turned
Off
.
VA –
Rated Apparent Power
Vn or V
N
–
Rated phase to phase voltage or if the
transformer is a LTC, Vn = (2 X Vmax X Vmin) /
(Vmax + Vmin).
Vector Group –
Integer n that represents the phase
shift from the first winding to the second winding of a
power transformer, n x 30°. See Table 4.1 and
Table 4.2 for list of vector groups.
WinDIGSI –
Windows based, Siemens software that
will enable the user to perform all settings and data
requisition with a PC through the relay’s
communication port. At the computer, the data can be
easily read on the screen, changed, saved to disk, or
printed.
WinDIGRA –
A full-function digital oscillographic
analysis (Windows based) software that will allow the
user to view captured waveforms.
Winding –
In this document it will refer to the side of
the transformer or tertiary.
Winding 1 is defined as
the reference winding.
The reference winding is
normally that of the higher voltage; however, if a CT is
installed in the ground lead of a grounded wye
connected transformer, that winding must be used as
the reference winding in order to ensure increased
ground-fault sensitivity by correction of the zero
sequence current.
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