Frequency Rate Of Change; Frequency Out-Of-Band Accumulation; Flexelements - GE G30 Instruction Manual
Generator protection system 7.6x
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- Communications manual (526 pages)
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METERING
6.4.6 Frequency rate of change
ACTUAL VALUES METERING FREQUENCY RATE OF CHANGE 1(4)
FREQUENCY RATE
OF CHANGE 1
The metered frequency rate of change for the frequency rate of change elements is shown here.
6.4.7 Frequency out-of-band accumulation
ACTUAL VALUES METERING FREQUENCY OOB ACCUMULATION
FREQUENCY OOB
ACCUMULATION
The frequency out-of-band accumulation metered values are displayed to the nearest percent as a ratio of the present
accumulation to the user-specified limit. Note that this value can be greater than 100%.
6.4.8 FlexElements
ACTUAL VALUES METERING FLEXELEMENTS FLEXELEMENT 1(16)
FLEXELEMENT 1
The operating signals for the FlexElements are displayed in pu values using the following definitions of the base units.
6
Table 6-2: FlexElement base units
Base unit
BREAKER ACC ARCING AMPS
(Brk X Acc Arc Amp A, B, and C)
BREAKER ARCING AMPS
(Brk X Arc Amp A, B, and C)
DCmA
FREQUENCY
FREQUENCY RATE OF CHANGE
PHASE ANGLE
POWER FACTOR
RTDs
SENSITIVE DIR POWER
(Sns Dir Power)
SOURCE CURRENT
SOURCE ENERGY
(Positive and Negative Watthours,
Positive and Negative Varhours)
SOURCE POWER
SOURCE THD & HARMONICS
SOURCE VOLTAGE
6-24
FREQUENCY RATE OF
CHANGE1: 0.00 Hz/s
FREQUENCY OOB BAND 1
ACCUMULATION: 0.0%
FREQUENCY OOB BAND 2
ACCUMULATION: 0.0%
FREQUENCY OOB BAND 7
ACCUMULATION: 0.0%
FLEXELEMENT 1
OpSig:
0.000
Description
2
BASE = 2000 kA
× cycle
2
BASE = 1 kA
× cycle
BASE = maximum value of the DCMA INPUT MAX setting for the two transducers configured
under the +IN and –IN inputs.
f
= 1 Hz
BASE
df/dt
= 1 Hz/s
BASE
ϕ
= 360 degrees (see the UR angle referencing convention)
BASE
PF
= 1.00
BASE
BASE = 100°C
P
= maximum value of 3 × V
BASE
BASE
for the sensitive power directional element(s).
I
= maximum nominal primary RMS value of the +IN and –IN inputs
BASE
E
= 10000 MWh or MVAh, respectively
BASE
P
= maximum value of V
BASE
BASE
BASE = 1%
V
= maximum nominal primary RMS value of the +IN and –IN inputs
BASE
× I
for the +IN and –IN inputs of the sources configured
BASE
× I
for the +IN and –IN inputs
BASE
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: ACTUAL VALUES
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