9328900990 Rev L BE1-951 Metering 5-3
Metering Function Serial Command HMI Screen
Power, True, C-phase M-WATTC 3.8.3
Power, Reactive M-VAR 3.8
Power, Reactive, Three-phase M-VAR3 3.8
Power, Reactive, A-phase M-VARA 3.8.1
Power, Reactive, B-phase M-VARB 3.8.2
Power, Reactive, C-phase M-VARC 3.8.3
Power, Apparent (VA) M-S 3.9
Power Factor M-PF 3.9
Frequency M-FREQ 3.10 – 3.11
Frequency, Phase M-FREQP 3.10
Frequency, Auxiliary M-FREQX 3.10
Frequency, Slip M-FREQS 3.11
Metered sync angle between Phase and Aux inputs M-SYNC 3.11
Voltage
The BE1-951 meters A-phase voltage, B-phase voltage, C-phase voltage, voltage across phases A and
B, phases B and C, and phases A and C. Negative-sequence voltage and three-phase zero-sequence
(residual) voltage are also metered. The VTP connection determines what is measured. For the auxiliary
voltage input, fundamental (Vx) and 3
rd
harmonic voltages (V3X) are measured.
Current
Metered current includes A-phase current, B-phase current, C-phase current, neutral three-phase zero-
sequence current and ground current. Other metered currents include negative-sequence current and
derived neutral current. All current measurements are auto ranging. Current is displayed in amps up to
9,999 A and then switches to kilo at 10.0 kA to 9,999 kA.
Frequency
Frequency is metered over a range of 10 to 75 hertz. If the measured frequency is outside this range, the
nominal system frequency will be displayed. Frequency is sensed from A-phase to Neutral for four-wire
sensing systems or from A-phase to B-phase for three-wire sensing systems. The frequency of auxiliary
voltage VX is also measured. Refer to
Figure 5-2.
Figure 5-2. Relationship of Slip Frequency and Sync Angle to Synchroscope
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