Schweitzer Engineering Laboratories SEL-787 - Metering; Table 5.1 Measured Fundamental Meter Values

5.3
Date Code 20081022 Instruction Manual SEL-787 Relay
Metering and Monitoring
Metering
Metering
The SEL-787 meter data fall into the following categories:
➤ Fundamental metering
➤ Differential metering
➤ Thermal metering: RTD metering (with the external SEL-2600
series RTD Module or an internal RTD option)
➤ Energy metering
➤ Maximum and minimum metering
➤ Math variable metering (analog quantities metering)
➤ RMS metering
➤ Analog transducer input metering
➤ Demand and peak demand metering
➤ Harmonic metering
➤ Synchrophasor metering
Fundamental
Metering
Table 5.1 details each of the fundamental meter data types in the SEL-787.
Section 8: Front-Panel Operations and Section 7: Communications describe
how to access the various types of meter data using the relay front panel and
communications ports.
All angles are displayed between –180 and +180 degrees. The angles are
referenced to VAB or VAN (for delta- or wye-connected PT, respectively) or
IAW1. If the voltage channels are not supported, or if VAB < 13 V (for delta-
Table 5.1 Measured Fundamental Meter Values
Relay Option Meter Values
All Models Line Currents: IAW1, IBW1, ICW1 and IAW2, IBW2, ICW2
magnitudes (A primary) and phase angles (deg)
IGW1, IGW2 (Residual Ground Fault Current) magnitude (A
primary) and phase angle (deg) for Winding 1 and 2
IAVW1, IAVW2 (Average Current Magnitude for Winding 1 and
2) (A primary)
Negative-Sequence Currents (3I2W1 and 3I2W2) (A primary)
With Neutral Current
Option (REF)
IN magnitude (A primary) phase angle (deg)
With Voltage Option VAB, VBC, VCA or VAN, VBN, VCN, VG magnitudes (V
primary) and phase angles (deg)
Average Voltage (L-L or L-N) (V primary)
Negative-Sequence (3V2) (V primary)
Real Power (kW)
Reactive Power (kVAR)
Apparent Power (kVA)
Power Factor
Volts/Hertz (%), System frequency (Hz)