Impedance calculations
The
Impedance calculations
submenu is divided into four sections: "Impedance calculation settings",
"Phase-to-phase impedances", "Phase-to-earth impedances" and "Positive sequence impedance". You
can activate impedance calculations in the rst section. "Phase-to-phase impedances" display the
resistances and reactances of the three phase-to-phase connections, both primary and secondary, as
well as the primary and secondary impedances and impedance angles. "Phase-to-earth impedances"
displays the resistances and reactances of the three phases as well the primary and secondary
impedances and impedance angles. "Positive sequence impedance" displays the resistances and
reactances (both primary and secondary) of the positive sequence as well as its primary and
secondary impedances and the impedance angle.
Phasors
Figure. 4.6. - 24. Phasors submenu.
The
Phasors
submenu holds the vector displays for voltages and currents, as well as the various
calculated components the IED may have (e.g. power, impedance, admittance). The vectors can be
viewed individually, alongside the per-unit values of the measured or calculated components. The
primary and secondary amplitudes are also shown. Phasors are helpful when solving incorrect wiring
issues.
4.7. Monitoring menu
The
Monitoring
main menu includes submenus (see the image below) for enabling the various
monitoring functions (
Monitors enabled
), setting the various monitoring functions (
Monitor functions
),
controlling the disturbance recorder (
Disturbance REC
) and accessing the device diagnostics (
Device
diagnostics
). The available monitoring functions depend on the type of the device in use.
Figure. 4.7. - 25. Monitoring menu view.
AQ-E215
Instruction manual
Version: 2.01
© Arcteq Relays Ltd
26
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