GE T60, Instruction Manual

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GE Multilin T60 Transformer Protection System 6-23
6 ACTUAL VALUES 6.3 METERING
6
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. See the Power
System section of chapter 5 for details.
6.3.6 FREQUENCY RATE OF CHANGE
PATH: ACTUAL VALUES

METERING

FREQUENCY RATE OF CHANGE
The metered frequency rate of change for the frequency rate of change elements is shown here.
6.3.7 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.

FREQUENCY RATE

OF CHANGE
FREQUENCY RATE OF
CHANGE 1: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 2: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 3: 0.00 Hz/s
MESSAGE
FREQUENCY RATE OF
CHANGE 4: 0.00 Hz/s

FLEXELEMENT 1

FLEXELEMENT 1
OpSig: 0.000 pu
Table 6–2: FLEXELEMENT BASE UNITS (Sheet 1 of 2)
BREAKER ACC ARCING AMPS
(Brk X Acc Arc Amp A, B, and C)
BASE = 2000 kA
2
× cycle
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
BASE = 1 kA
2
×
cycle
DCmA BASE = maximum value of the
DCMA INPUT MAX
setting for the two transducers configured
under the +IN and –IN inputs.
FREQUENCY f
BASE
= 1 Hz
FREQUENCY RATE OF CHANGE df/dt
BASE
= 1 Hz/s
PHASE ANGLE ϕ
BASE
= 360 degrees (see the UR angle referencing convention)
POWER FACTOR PF
BASE
= 1.00
RTDs BASE = 100°C
SOURCE CURRENT I
BASE
= maximum nominal primary RMS value of the +IN and –IN inputs
SOURCE ENERGY
(Positive and Negative Watthours,
Positive and Negative Varhours)
E
BASE
= 10000 MWh or MVAh, respectively
SOURCE POWER P
BASE
= maximum value of V
BASE
× I
BASE
for the +IN and –IN inputs
SOURCE THD & HARMONICS BASE = 1%
SOURCE VOLTAGE V
BASE
= maximum nominal primary RMS value of the +IN and –IN inputs
SYNCHROCHECK
(Max Delta Volts)
V
BASE
= maximum primary RMS value of all the sources related to the +IN and –IN inputs
VOLTS PER HERTZ BASE = 1.00 pu
XFMR DIFFERENTIAL CURRENT
(Xfmr Iad, Ibd, and Icd Mag)
I
BASE
= maximum primary RMS value of the +IN and -IN inputs
(CT primary for source currents, and transformer reference primary current for transformer
differential currents)