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Hybrid ANSI Revenue Meter
& Power Quality Analyzer

The EM920 is the ANSI version of the eXpertMeterTM Series of multifunctional power analyzers. This series was designed to deliver two functionalities that are present in every substation, in a single device:

  • PQ Analyzer & Power Meter, typically required by utility SCADA teams
  • Revenue Meter, typically operated and read by the utility billing department

Combining these functions simplifies design and eliminates redundancy.

Revenue Meter:

  • Class 0.2 per ANSI C12.20
  • Anti-tamper revenue grade design
  • 5A or 1A current inputs

Power Quality Analyzer

  • PQ monitoring per IEC 61000-4-30 Class A requirements
  • IEEE 1159 statistics and reports
  • Waveform capture and transient recording at 1024 samples per cycle

Transformer and transmission line losses calculation


  • IEC 61850
  • Built-in: RS485/232 / IR / IRIG-B
  • Optional ports: ETH; 2G/3G; USB
  • Open protocol: Modbus RTU; DNP3.0

Digital & Analog I/O: up to 8 I/O

Backup Battery: up to 6 hours of full operation. Rechargeable

Transformer/Line losses calculation

Based on parameters such as copper losses and iron losses, this unique economical feature enables the meter to accurately establish a virtual metering point. This eliminates the need to construct a costly high voltage metering point, requiring a metering cubicle, CT and PT.

Technical Specifications

Multi-Functional 3-Phase Power Meter

  • Voltage, current (including neutral current), power, energy, power factor, frequency, voltage/current unbalance
  • Current range up to 200% (120% for 100A model)
  • Ampere/Volt demand meter
  • 25, 50, 60 and 400 Hz measurements
  • 128 samples per cycle

Revenue Meter

  • Exceeds accuracy class 0.5S
  • Four-quadrant active and reactive energy poly-phase static meter
  • Three-phase total and per phase energy measurements; active, reactive and apparent energy counters
  • Time-of-Use, 4 totalization and tariff energy/demand registers x 8 tariffs, 4 seasons x 4 types of days, 8 tariff changes per day
  • One–time easy programmable tariff calendar schedule
  • Automatic daily energy and maximum demand profile log for total and tariff registers

Power Quality Analyzer

  • Power Quality Analysis according to IEC 61000-4-30 Class A
  • EN50160 monitoring, statistics & reports
  • 6 hour battery back-up and/or auxiliary power supply for continuous recording of major dips & interruptions
  • Harmonics & Inter-harmonics per IEC 61000-4-7
  • Voltage and current THD, TDD and K-Factor, up to 50th order harmonic
  • Voltage and current harmonic spectrum and angles
  • Directional power harmonics
  • Flicker measurement per IEC 61000-4-15
  • Waveform recording, up to 1024 samples/cycle*

*with transient recording module

Transient Recorder

  • Records fast transients overvoltages >17 microseconds
  • Transients measured relative to ground
  • Measures up to 2 kV pulses

Current Inputs

1A or 5A inputs

voltage input

Measurement and Power Supply*:

  • High-range power supply (207-480V option):96- 575V AC
  • Low range power supply (100-120V option): 45 – 250 V AC

*self-energized (SE) from voltage inputs



  • 2 Digital Inputs
  • 1 KYZ Relay

modular I/O (available options):

  • 6 Relay Outputs: 2 x Form A + 4 x Form C
  • 8 Digital Inputs
  • 4 Analog Outputs

(see Module tab for detailed spec)

Programmable Logical Controller

  • Embedded programmable controller
  • 16 control set points; programmable thresholds and delays
  • ½-cycle response time

Communication Interfaces


  • Standard 2-wire RS-485 serial port
  • IR (optical)
  • USB

Modular (optional):

  • IRIG-B
  • 4G modem
  • ETH
  • IRIG-B
  • 2G/3G/4G Cellular

Communication Protocols

  • IEC 61850
  • IEC 62056-21 (DLMS)
  • Modbus RTU
  • DNP 3.0
  • Modbus/TCP
  • DNP3/TCP

Meter Security

  • 3 levels Password security for protecting meter setups and accumulated data from unauthorized changes
  • anti-tamper design


Socket-mount: ANSI C12.10 – FORM 9S/9A


  • High contrast 4” Graphical backlit LCD display
  • 320×240 pixel (¼ VGA)
  • Auto-scroll option with adjustable page exposition time; auto-return to a default page
  • Multilingual (English/Spanish)

Real Time Clock

  • Built-in clock and calendar functions
  • 2 year battery backup
  • SNTP Time Synchronization

Power Supply

Available Options:

Self-energized (default):

  • 45 – 250 V AC
  • 96- 575V AC

Auxiliary power supply (module):

50-288V AC (0-400Hz) / 90-290V DC


Our software packages complete our product line, offering a total solution for your power system. SATEC’s on-line service, eXpertpower, collects, archives and analyses energy and power quality data. eXpertpower allows multiple users to view data, create automated billing, produce sophisticated reports and implement energy.

Plug-In Modules


The EM920’s unique “Add-On” modularity is the key to its remarkable versatility and unprecedented effort to add intelligence, control and communications to electrical metering. SATEC’s “Add-On” module concept allows you to configure the meter to your changing needs, thus saving valuable time in the field or future costly replacements.

Transient Recorder

Sampling rate up to 1024 samples per cycle

Auxiliary Power Supply

50-288V AC / 90-290V DC

Communication modules

Available modules:

  • ETH: includes IRIG-B and additional RS-232/485
  • Dual ETH: 2 x ETH + IRIG-B + additional RS-232/485
  • 2G/3G cellular
  • 4G cellular (Verizon)

Input / Output Modules

Available modules:

  • 6 Relay Outputs: 2 Form A + 4 Form C
  • 8 Digital Inputs module
  • 4 Analog Outputs module
    • ±1mA
    • 0-1 mA
    • 0-20 mA
    • 4-20 mA

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