![background image](http://html1.mh-extra.com/html/abb/rec650-ansi/rec650-ansi_applications-manual_3390438167.webp)
residual sum will have the same value as the remaining phase-to-ground voltage. See
.
V
_A
V_B
V_
C
V
_A
F
IL
1
F
V_B
V
_C
3V
0
ANSI07000189-1-en.vsd
ANSI07000189 V1 EN
Figure 65:
Ground fault in Direct grounded system
7.3.3.4
Settings for Two step residual overvoltage protection
GlobalBaseSel
: Selects the global base value group used by the function to define (
IBase
),
(
VBase
) and (
SBase
).
Operation
:
Disabled
or
Enabled
VBase
is used as voltage reference for the voltage. The voltage can be fed to the IED in
different ways:
1. The IED is fed from a normal voltage transformer group where the residual voltage
is created from the phase-to-ground voltages within the protection software.
2. The IED is fed from a broken delta connection normal voltage transformer group. In
an open delta connection the protection is fed by the voltage 3V0 (single input). The
1MRK 511 286-UUS A
Section 7
Voltage protection
161
Application manual
Summary of Contents for REC650 ANSI
Page 1: ...Relion 650 series Bay control REC650 ANSI Application manual...
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Page 66: ...Section 3 1MRK 511 286 UUS A REC650 setting examples 60 Application manual...
Page 71: ...IED IED ANSI05000460 V2 EN 1MRK 511 286 UUS A Section 4 Analog inputs 65 Application manual...
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