GL.5
Date Code 20090730 Instruction Manual SEL-734 Meter
Glossary
Event Report—IG
Event Report
A text-based collection of data stored by the meter in response to a triggering
condition, such as an ASCII TRI command. The data show meter
measurements before and after the trigger, in addition to the states of elements
each processing interval.
Event Summary
A shortened version of stored event reports. An event summary includes items
such as event date and time, event type.
The meter sends an event report summary (if auto messaging is enabled) to the
meter serial port a few seconds after an event.
F_TRIG
Falling-edge trigger. Boolean SELOGIC control equation operator that triggers
an operation upon logic detection of a falling edge.
Fail-Safe
Refers to an output that is open during normal meter operation and closed
when meter power is removed or if the meter fails. Configure alarm outputs
for fail-safe operation.
Falling Edge
Transition from logical 1 to logical 0.
Fast Meter
SEL binary serial port command used to collect metering data with SEL
devices.
Fast Operate
SEL binary serial port command used to perform control with SEL devices.
Firmware
The nonvolatile program stored in the meter that defines meter operation.
Flash Memory
A type of nonvolatile meter memory used for storing large blocks of
nonvolatile data.
Flicker
The visible, periodic change in light intensity of an incandescent bulb caused
by the fluctuation of input voltage. IEC 61000-4-15 specifies the requirements
for the measurement of flicker.
Function Code
A code that defines how you manipulate an object in DNP3 protocol.
Fundamental Frequency
The component of the measured electrical signal with a frequency equal to the
normal electrical system frequency, usually 50 Hz or 60 Hz. Generally used to
differentiate between the normal system frequency and any harmonic
frequencies present.
Global Settings
General settings including those for date format, phase rotation, control
inputs, ASCII report scaling, and time and date management.
GPS
Global Positioning System. Source of position and high-accuracy time
information.
GUI
Graphical user interface.
Hexadecimal Address
A register address consisting of a numeral with an “h” suffix or a “0x” prefix.
HMI
Human machine interface.
IA, IB, IC
Measured A-phase, B-phase, and C-phase currents.
IED
Intelligent electronic device.
IG
Residual current, calculated from the sum of the phase currents. In normal,
balanced operation, this current is very small or zero.
Courtesy of NationalSwitchgear.com
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