6-18
T35 Transformer Protection System
GE Multilin
6.3 METERING
6 ACTUAL VALUES
6
The metered values for real, reactive, and apparent power, as well as power factor, are displayed in this menu. The "SRC
1" text is replaced by whatever name was programmed by the user for the associated source (see
SETTINGS
SYSTEM
SETUP
SIGNAL SOURCES
).
When VTs are configured in wye, the T35 calculates power in each phase and three-phase power is measured as
S = V
A
x Î
A
+ V
B
x Î
B
+ V
C
x Î
C
(EQ 6.1)
When VTs are configured in delta, the T35 does not calculate power in each phase and three-phase power is measured as
S = V
AB
x Î
A
+ V
CB
x Î
C
(EQ 6.2)
where
S is the apparent power
V
A
, V
B
, V
C
, I
A
, I
B
, I
C
are phase voltage and phase current phasors
V
AB
and V
CB
are phase-to-phase voltage phasors
Î is the conjugate of I
g) FREQUENCY METERING
PATH: ACTUAL VALUES
METERING
SOURCE SRC 1
FREQUENCY
The metered frequency values are displayed in this menu. The "SRC 1" text will be replaced by whatever name was pro-
grammed by the user for the associated source (see
SETTINGS
SYSTEM SETUP
SIGNAL SOURCES
).
SOURCE FREQUENCY
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP
POWER SYSTEM
settings). The signal used for frequency estimation is low-pass filtered. The
final frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
6.3.4 TRACKING FREQUENCY
PATH: ACTUAL VALUES
METERING
TRACKING FREQUENCY
The tracking frequency is displayed here. The frequency is tracked based on the selection of the reference source with the
FREQUENCY AND PHASE REFERENCE
setting in the
SETTINGS
SYSTEM SETUP
POWER SYSTEM
menu. Refer to the
Power System
section of chapter 5 for additional details.
6.3.5 FLEXELEMENTS
PATH: ACTUAL VALUES
METERING
FLEXELEMENTS
FLEXELEMENT 1(16)
The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
MESSAGE
SRC 1 POWER FACTOR
φ
a: 1.000
MESSAGE
SRC 1 POWER FACTOR
φ
b: 1.000
MESSAGE
SRC 1 POWER FACTOR
φ
c: 1.000
FREQUENCY
SRC 1
SRC 1 FREQUENCY:
0.00 Hz
TRACKING FREQUENCY
TRACKING FREQUENCY:
60.00 Hz
FLEXELEMENT 1
FLEXELEMENT 1
OpSig: 0.000 pu
Summary of Contents for T35 UR Series
Page 10: ...x T35 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 48: ...2 18 T35 Transformer Protection System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 314: ...5 192 T35 Transformer Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 338: ...6 24 T35 Transformer Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 350: ...7 12 T35 Transformer Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 366: ...8 16 T35 Transformer Protection System GE Multilin 8 2 CYBERSENTRY 8 SECURITY 8 ...
Page 406: ...A 14 T35 Transformer Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 540: ...D 10 T35 Transformer Protection System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIX D D ...
Page 552: ...E 12 T35 Transformer Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Page 560: ...F 8 T35 Transformer Protection System GE Multilin F 3 WARRANTY APPENDIX F F ...
