Multi-measurement
• Currents
– I1, I2, I3, In, Isystem
• Voltages & frequency
– V1, V2, V3, VN, Vsystem, U12, U23, U31, Usystem, f
• Powers
– P1, P2, P3, ΣP, Q1, Q2, Q3, ΣQ, S1, S2, S3, ΣS
– Predictive powers ΣP, ΣQ, ΣS
• Power factor
– PF1, PF2, PF3, ΣPF
• Cos ϕ & tangent ϕ
– Instantaneous values per phase
Metering
• Active energy: +/- kWh
• Reactive energy: +/- kvarh
• Apparent power: kVAh
• Multi-tariff (8 max.)
• Hour Meter
Quality
• Voltage Unbalance
– Vdir, Vinv, Vhom, Udir, Uinv, Unba, Vnba, Vnb, Unb
• Current unbalance
– Idir, Iinv, Ihom, Inba, Inb
• Total harmonic distortion
– Currents THDi1, THDi2, THDi3,THDiN, TDDI
– Phase-to-neutral voltage THDv1, THDv2, THDv3
– Phase-to-phase voltage THDu12, THDu23, THDu31
• Individual harmonics up to rank 63
– Currents: I1h, I2h, I3h, INh
– Phase-to-neutral voltage: V1h, V2h, V3h
– Phase-to-phase voltage: U12h, U23h, U31h
• Quality events
– Voltage sags, cut-offs and swells EN50160
– Kfactor & Crest factor
• Events according to EN 50160
– Voltage dips, outages, voltage surges
Monitoring of protection
• Auxiliary contact monitoring
• Report and alarm on trips
• Number of operations
Load curves and historical records (max. 130 days)
• Active, reactive and apparent power
• Currents, voltages and frequency
Alarms
• Alarms for all electrical values, events and input status changes, possibility of logical combination
• Time-stamping of events
Communication
• DIRIS A-40 RS485 Modbus as standard
• DIRIS A-40 Ethernet Modbus
• DIRIS A-40 PROFIBUS DPV1
Inputs
• 3 digital inputs
– Power supplied from DIRIS A-40 or an external source
– Function: logic status, status of circuit breaker, counting of pulses or synchronization multifluid metering
• 2 logical outputs
– Function: Command, energy pulse output, load sheeding, alarm