R.B.9
Date Code 20111215 Reference Manual SEL-421 Relay
Analog Quantities
Quantities Listed by Function
VARMS, VBRMS, VCRMS Phase 10-cycle average rms voltage kV
a
VABFM, VBCFM, VCAFM Phase-to-phase 10-cycle average fundamental voltage magnitude kV
a
VABFA, VBCFA, VCAFA Phase-to-phase 10-cycle average fundamental voltage angle degrees
VABRMS, VBCRMS, VCARMS Phase-to-phase 10-cycle average rms voltage kV
a
V1FIM Positive-sequence instantaneous voltage magnitude V
V1FIA Positive-sequence instantaneous voltage angle degrees
V1M Positive-sequence 10-cycle average voltage magnitude kV
a
V1A Positive-sequence 10-cycle average voltage angle degrees
3V2FIM Negative-sequence instantaneous voltage magnitude V
3V2FIA Negative-sequence instantaneous voltage angle degrees
3V2M Negative-sequence 10-cycle average voltage magnitude kV
a
3V2A Negative-sequence 10-cycle average voltage angle degrees
3V0FIM Zero-sequence instantaneous voltage magnitude V
3V0FIA Zero-sequence instantaneous voltage angle degrees
3V0M Zero-sequence 10-cycle average voltage magnitude kV
a
3V0A Zero-sequence 10-cycle average voltage angle degrees
Synchronism Check
VPM Synchronism-check polarizing voltage magnitude V
NVS1M Normalized synchronizing voltage 1 V
NVS2M Normalized synchronizing voltage 2 V
ANG1DIF Synchronizing angle difference 1 degrees
ANG2DIF Synchronizing angle difference 2 degrees
SLIP1 Synchronism-check element 1 slip frequency Hz
SLIP2 Synchronism-check element 2 slip frequency Hz
Frequency
FREQ Measured system frequency
b
Hz
FREQPM System Frequency from Synchrophasors
b
Hz
DFDT Rate-of-change of frequency, df/dt
b
Hz/s
DC Monitor
DC1, DC2 Filtered dc monitor voltage V
DC1PO, DC2PO Average positive-to-ground dc voltage V
DC1NE, DC2NE Average negative-to-ground dc voltage V
DC1RI, DC2RI AC ripple of dc voltage V
DC1MIN, DC2MIN Minimum dc voltage V
DC1MAX, DC2MAX Maximum dc voltage V
Power
PA_f, PB_f, PC_f Phase fundamental real power MW
a
3P_f Three-phase fundamental real power MW
a
PA, PB, PC Phase real power MW
a
3P Three-phase real power MW
a
QA_f, QB_f, QC_f Phase fundamental reactive power MVAr
a
Table B.2 Analog Quantities Sorted By Function (Sheet 2 of 7)
Label Description Units
To Next Page
Loading...
