GE N60 Instruction Manual page 534

METERING
6
This menu displays metered values for current and power demand. The "SRC 1" text is replaced by the name programmed
by the user for the associated source (see
The relay measures (absolute values only) the source demand on each phase and average three phase demand for real,
reactive, and apparent power. These parameters can be monitored to reduce supplier demand penalties or for statistical
metering purposes. Demand calculations are based on the measurement type selected in the
menu. For each quantity, the relay displays the demand over the most recent demand time interval, the
 DEMAND
maximum demand since the last maximum demand reset, and the time and date stamp of this maximum demand value.
Maximum demand quantities can be reset to zero with the
6.4.2.9 Frequency metering
ACTUAL VALUES  METERING  SOURCE SRC 1  FREQUENCY
 FREQUENCY
 SRC 1
The metered frequency values are displayed in this menu. The "SRC 1" text is replaced by the name programmed by the
user for the associated source (see
SOURCE FREQUENCY
Clarke transformation of three-phase voltages or currents, auxiliary voltage, or ground current as per source configuration
(see the
SYSTEM SETUP  POWER SYSTEM
frequency measurement is passed through a validation filter that eliminates false readings due to signal distortions and
transients.
6-20
SRC 1 DMD IB MAX:

0.000 A
SRC 1 DMD IB DATE:

2001/07/31 16:30:07
SRC 1 DMD IC:

0.000 A
SRC 1 DMD IC MAX:

0.000 A
SRC 1 DMD IC DATE:

2001/07/31 16:30:07
SRC 1 DMD W:

0.000 W
SRC 1 DMD W MAX:

0.000 W
SRC 1 DMD W DATE:

2001/07/31 16:30:07
SRC 1 DMD VAR:

0.000 var
SRC 1 DMD VAR MAX:

0.000 var
SRC 1 DMD VAR DATE:

2001/07/31 16:30:07
SRC 1 DMD VA:

0.000 VA
SRC 1 DMD VA MAX:

0.000 VA
SRC 1 DMD VA DATE:

2001/07/31 16:30:07
SETTINGS  SYSTEM SETUP  SIGNAL SOURCES
SRC 1 FREQUENCY:

0.00 Hz
SETTINGS  SYSTEM SETUP  SIGNAL SOURCES
is measured via software-implemented zero-crossing detection of an AC signal. The signal is either a
settings). The signal used for frequency estimation is low-pass filtered. The final
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CLEAR RECORDS  CLEAR DEMAND RECORDS
).
CHAPTER 6: ACTUAL VALUES
).
SETTINGS  PRODUCT SETUP
command.