EW800A DEM

 

For an accurate monitoring of the electric energy consumption and relevant line parameters

The Distributed Electricity Meter (DEM) performs an accurate monitoring of the energy usage and line quality of a three-phase load (up to the level of a single machinery). It allows the user to collect in a very distributed way all the relevant energy consumption values and the relevant electrical parameters, including harmonic content up to 51st harmonic.

The data of each single DEM will then be sent to a data manager with either RS485 or Radio interfaces.

A network of DEM connected to a single data manager can count up to 250 devices.

A remote user can get the data from the data manger using the embedded web server in a HTML5 compatible format.

Features:

  • Energy meter single- or three-phase
  • Measurement of active, reactive and apparent energy
  • Measurement of active, reactive and apparent power
  • Parameters: current, voltage, power factor
  • Direct measure up to 64 ARMS
  • Line quality: harmonics (1st…51th), THD
  • Up to 250 devices connected to a single Data Manager
  • Precision class (active energy): 1%.
  • Communication (options): RS485 ModBus, Radio Sub1Ghz (868MHz), Powerline

User Interface:

  • Graphic Display 256×96 pixels, with white LED backlight
  • Intuitive menus using a resistive touch screen interface
  • Data refresh on display: 1 s

TECHNICAL DATA
Nominal Phase Current (A): IPN 48 ARMS direct connection
Current Operating Range (A) 1 … 64 ARMS
Max Current Peak (A) 100 APEAK
Nominal Voltage Phase to N (V): UPN 230 VRMS
Nominal Voltage Phase to Phase (V): UPh-Ph 400 VRMS
Nominal Voltage Range Phase to N (V) 184 … 276 VRMS
Nominal Voltage Range Phase to Phase (V) 319 … 480 VRMS
Rated Supply Voltage Internal supply from any of Phase to N line (230 VAC)
Max power consumption 2W max
Operating temp. -10…55 °C
Storage temp. -25 +75°C
Relative umidity 5- 80% (no condensation)
Certification EN 61010-1 (Safety)
EN 61326-1 (EMC)
Isolation Class II, EN 61010-1 CAT III 300 VRMS, Pollution degree: PD2
Mounting
Housing
DIN Rail
DIN 43880

 

ACCURACY:
Frequency (Hz): 45 …65 Hz
Apparent Energy (kVAh) ± 1.0% Max
Active Energy (kWh) ± 1.0% Max
Apparent Power (kVA) ± 1.0% Max
Active Power (kW) ± 1.0% Max
Current RMS @ IPN ± 0.5% Max
Voltage RMS @ VPN ± 0.5% Max

 

MEASUREMENTS:
Active Energy E1, E2, E3, ETOT
Active Energy (export) Ee1, Ee2, Ee3, EeTOT
Reactive Energy Eq1, Eq2, Eq3, EqTOT
Apparent Energy Es1, Es2, Es3, EsTOT
Active Power P1, P2, P3, PTOT
Active Power (export) P1e, P2e, P3e, PeTOT
Reactive Power Q1, Q2, Q3, QTOT, inductive or capacitive
Apparent Power S1, S2, S3, STOT
Voltage V1, V2, V3, V12, V23, V31, VAVG, VcAVG
Current I1, I2, I3, In, IAVG
Max Voltage V1+, V2+, V3+, V+ TOT, V1-, V2-, V3-, V- TOT
Max Current I1+, I2+, I3+, I+ TOT, I1-, I2-, I3-,I- TOT
Frequency F
Power Factor PF1, PF2, PF3, PFTOT
Total Harmonic Distorsion THD1, THD2, THD3, THDTOT
Voltage harmonic (% of fundamental) 1st…51th
Current harmonic (% of fundamental) 1st…51th