GE F60 - Tracking Frequency; Frequency Rate of Change; Flexelements

6-24 F60 Feeder Protection System GE Multilin
6.3 METERING 6 ACTUAL VALUES
6
6.3.5 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. 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(8)
The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
 TRACKING FREQUENCY

TRACKING FREQUENCY:
60.00 Hz
 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 ARCING AMPS
(Brk X Arc Amp A, B, and C)
BASE = 2000 kA
2
× cycle
DCmA BASE = maximum value of the
DCMA INPUT MAX setting for the two transducers configured
under the +IN and –IN inputs.
FAULT LOCATION BASE = Line Length as specified in Fault Report
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
SENSITIVE DIR POWER
(Sns Dir Power)
P
BASE
= maximum value of 3 × V
BASE
× I
BASE
for the +IN and –IN inputs of the sources
configured for the sensitive power directional element(s).
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%