Tracking Frequency; Flexelements - GE UR Series Instruction Manual

6.3 METERING
PATH: ACTUAL VALUES
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TRACKING FREQUENCY

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The tracking frequency is displayed here. The frequency is tracked based on configuration of the reference source. See
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SETTINGS SYSTEM SETUP
inputs configured the frequency is measured digitally using a Clarke combination of all three-phase signals for optimized
performance during faults, open pole, and VT fuse fail conditions.
PATH: ACTUAL VALUES
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FLEXELEMENT 1
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The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
Table 6–2: FLEXELEMENT™ BASE UNITS
87L SIGNALS
(Local IA Mag, IB, and IC)
(Diff Curr IA Mag, IB, and IC)
(Terminal 1 IA Mag, IB, and IC)
(Terminal 2 IA Mag, IB and IC)
87L SIGNALS
(Op Square Curr IA, IB, and IC)
(Rest Square Curr IA, IB, and IC)
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
dcmA
6
FREQUENCY
PHASE ANGLE
POWER FACTOR
RTDs
SOURCE CURRENT
SOURCE POWER
SOURCE VOLTAGE
SYNCHROCHECK
(Max Delta Volts)
6-16
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METERING TRACKING FREQUENCY
TRACKING FREQUENCY:
60.00 Hz
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for more details on frequency metering and tracking. With three-phase
POWER SYSTEM
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METERING

FLEXELEMENTS

FLEXELEMENT 1 OpSig:
0.000 pu
I = maximum primary RMS value of the +IN and –IN inputs
BASE
(CT primary for source currents, and 87L source primary current for line differential currents)
BASE = Squared CT secondary of the 87L source
2
BASE = 2000 kA
BASE = maximum value of the
under the +IN and –IN inputs.
f = 1 Hz
BASE
ϕ
= 360 degrees (see the UR angle referencing convention)
BASE
PF = 1.00
BASE
BASE = 100°C
I = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
P = maximum value of V
BASE
V = maximum nominal primary RMS value of the +IN and –IN inputs
BASE
V = maximum primary RMS value of all the sources related to the +IN and –IN inputs
BASE
L90 Line Differential Relay
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FLEXELEMENT 1(8)
× cycle
setting for the two transducers configured
DCMA INPUT MAX
× I
for the +IN and –IN inputs
BASE BASE
6 ACTUAL VALUES
6.3.5 TRACKING FREQUENCY
6.3.6 FLEXELEMENTS™
GE Power Management