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E31 Series Installation Guide
Data Outputs (cont.)
Z205667-0G
Page 8 of 23
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• Signed power factor: By default the E31 reports power factor as an unsigned value. The user can set it to report as a
signed value, where the sign indicates whether the current phase angle leads or lags the corresponding voltage phase.
• Demand/snapshot time interval source: The E31 offers two mechanisms for driving the demand/snapshot time
interval, an interval timer or an RTC (real-time clock). The legacy mode (default) uses an interval timer that does not
need to be set to an absolute time. When using the interval timer the demand/snapshot interval can be set from
10 to 32767 seconds (over 9 hours). An alternate mode utilizes an RTC set to a specific date and time to synchronize
the results with a larger system. The RTC must first be set in order to run and capture demand values and energy
snapshots. When power is interrupted, the RTC resets to a default date and time and must be set again in order to run.
When using the RTC, the demand/snapshot interval can be set from 10 to 3600 seconds (1 hour).
Monitoring of Mains
Current: multi-phase average and per phase
Current phase angle
Real power (kW): multi-phase total and per phase
Apparent power (kVA): multi-phase total and per phase
Real Time Measurements
Power factor: multi-phase average and per phase
Voltage - L-L: multi-phase average and per phase
Voltage - L-N: multi-phase average and per phase
Frequency (phase A)
Current present demand: multi-phase average and per phase
Demand Measurements
Real Power (kW) present demand: multi-phase average and per phase
Maximum instantaneous current: multi-phase average and per phase
Maximum current demand: multi-phase average and per phase
Historic Maximums
Maximum real power demand: multi-phase total and per phase
Accumulated Energy
Energy (kWh): multi-phase total and per phase
Energy Snapshots
Energy (kWh): multi-phase total and per phase
Monitoring of Branch Circuits
Current: multi-phase average and per phase
Current phase angle per branch
Real power (kW): multi-phase total and per phase
Real Time Measurements
Apparent power (kVA): multi-phase total and per phase
Power factor: multi-phase average and per phase
Current present demand: multi-phase average and per phase
Demand Measurements
Real power (kW) present demand: multi-phase average and per phase
Maximum instantaneous current: multi-phase average and per phase
Maximum current demand: multi-phase average and per phase
Historic Maximums
Maximum real power demand: multi-phase total and per phase
Accumulated Energy
Energy (kWh): multi-phase total and per phase
Energy Snapshots
Energy (kWh): multi-phase total and per phase
Voltage over/under
Branch current over/under
Alarms
Mains current over/under
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Modbus Alarms
TM
E31A
E31B
E31C
0815
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