GE F60 User Manual

6-22 F60 Feeder Protection System GE Multilin
6.3 METERING 6 ACTUAL VALUES
6
 DEMAND menu. For each quantity, the relay displays the demand over the most recent demand time interval, the maxi-
mum demand since the last maximum demand reset, and the time and date stamp of this maximum demand value. Maxi-
mum demand quantities can be reset to zero with the CLEAR RECORDS  CLEAR DEMAND RECORDS command.
i) FREQUENCY METERING
PATH: ACTUAL VALUES  METERING  SOURCE SRC 1  FREQUENCY
The metered frequency values are displayed in this menu. The "SRC 1" text will be replaced by whatever name was pro-
grammed by the user for the associated source (see SETTINGS  SYSTEM SETUP  SIGNAL SOURCES).
SOURCE FREQUENCY is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the SYSTEM SETUP  POWER SYSTEM settings). The signal used for frequency estimation is low-pass filtered. The
final frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
j) CURRENT HARMONICS AND THD METERING
PATH: ACTUAL VALUES  METERING  SOURCE SRC 1  CURRENT HARMONICS
The metered current harmonics values are displayed in this menu. The "SRC 1" text will be replaced by whatever name
was programmed by the user for the associated source (see SETTINGS  SYSTEM SETUP  SIGNAL SOURCES). Current
harmonics are measured for each source for the total harmonic distortion (THD) and 2nd to 25th harmonics per phase.
k) VOLTAGE HARMONICS AND THD METERING
PATH: ACTUAL VALUES  METERING  SOURCE SRC 1  VOLTAGE HARMONICS
The metered voltage harmonics values are displayed in this menu. The “SRC 1” text will be replaced by the programmed
name for the associated source (see the
SETTINGS  SYSTEM SETUP  SIGNAL SOURCES menu).
To extract the 2nd to 25th voltage harmonics, each harmonic is computed on a per-phase basis, where:
 FREQUENCY
 SRC 1
SRC 1 FREQUENCY:
0.00 Hz
 CURRENT HARMONICS
 SRC 1
SRC 1 THD Ia: 0.0
Ib: 0.0 Ic: 0.0%
MESSAGE
SRC 1 2ND Ia: 0.0
Ib: 0.0 Ic: 0.0%
MESSAGE
SRC 1 3RD Ia: 0.0
Ib: 0.0 Ic: 0.0%
↓
MESSAGE
SRC 1 25TH Ia: 0.0
Ib: 0.0 Ic: 0.0%
 VOLTAGE HARMONICS
 SRC 1
SRC 1 THD Va: 0.0
Vb: 0.0 Vc: 0.0%
MESSAGE
SRC 1 2ND Va: 0.0
Vb: 0.0 Vc: 0.0%
MESSAGE
SRC 1 3RD Va: 0.0
Vb: 0.0 Vc: 0.0%
↓
MESSAGE
SRC 1 25TH Va: 0.0
Vb: 0.0 Vc: 0.0%

GE F60 Specifications

General

Brand	GE
Model	F60
Category	Protection Device
Language	English