Viewing Measurements - ABB REF 542plus Operator's Manual

1MRS755869
9.
Multifunction Protection and Switchgear Control Unit
Operator's manual

Viewing measurements

REF 542plus offers complete measurements set to the user. To view the
measurements, select the measurement menu with the navigation button. Use the UP
and DOWN buttons to browse the measurement pages.
The available measurements depend upon the unit configuration. In the maximum
configuration, the following measurements are displayed:
IL1, IL2, IL3, in A; line currents, measured values
*
U1E, U2E, U3E, in kV; phase to earth voltages, measured values
*
UL12, UL23, UL31, in kV; phase-to-phase voltages, computed values.
*
IL1 mean, IL2 mean, IL3 mean, in A; mean currents in the observation period,
*
computed values
IL1 max, IL2 max, IL3 max, in A; maximum peak currents in the observation
*
period, computed values
Frequency, in Hz; measured values
*
Active power, in kW; reactive power in kVAr, apparent power in kVA, computed
*
values
Power factor, computed value
*
Active energy in MWh, reactive energy in Mvarh; computed values
*
Operating hours, in hours. This is the total working hours of the unit
*
Switch cycle, number the circuit breaker close-open cycles
*
Added switched current, in kA; sum of the interrupted currents by the circuit
*
breaker
THD (total harmonic distortion)
*
The observation period is set with the Operating Tool. It can be from 0
minutes up to 30 minutes. If the observation period is set to 0, the
corresponding measurements are disabled.
The refresh time for the displayed measurements is about half second.
1)
REF 542plus can also use phase-to-phase voltage transformers. When used,
phase-to-phase voltages are measured and phase to earth voltages are computed.
REF 542plus REF 542plus
1)
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