IEC61850 Ultra-compact AC/DC Energy Meter & Power Quality Analyzer

Description

EM335 PRO is a ultra-compact power meter in DIN-rail form factor with 1.77” TFT display. It monitors voltage, current, power, frequency, and energy measurements, while also providing power quality analysis and data logging capabilities.

EM235 PRO supports multiple communication protocols, including IEC 61850, DNP3, and IEC 60870-5-101/104, along with dual-port Ethernet connectivity. As a result, it serves as the ultimate solution for power monitoring, meeting and even exceeding the current requirements in utility, substation, industrial automation, and commercial energy management applications.

DC Metering

The EM235 PRO features precise Direct Current (DC) Metering using Direct Current sensors, setting it apart as a distinctive meter suitable for DC applications like renewable energy systems and data centers.
It seamlessly integrates SATEC's features, including data logging, high accuracy, and advanced communication protocol options.

Dynamic Containment

The Dynamic Containment guidelines include the technical specifications for fast response to frequency fluctuations and the required metering scheme and report, which must be sent to National Grid's data concentrator.

SATEC EM235 PRO have been uniquely adjusted to comply and exceed the requirements for monitoring, specified in Dynamic Containment. This includes:

• Providing frequency readings at a 4 decimal resolution
• Providing a bespoke data log for the required parameters to be sent to the data concentrator

The EM235 PRO meter is an extremely advanced analyzer, compliant with the Class A, Ed. 3 category of power quality analysis, per IEC 61000-4-30.

Digital Substation & Industrial Energy Management

Today's world of power metering and telemetry requires full connectivity, relying on advanced communication protocols and enveloping cyber-security. Featuring a comprehensive communication platform, including Dual Port Ethernet, IEC 61850 communication protocol, DNP3 and IEC 60870-5101/104 the EM235 PRO meter is designed to answer the needs of the modern digital substation.

By integrating attachable digital I/O modules and leveraging measured electrical parameters, these meters offer versatile control capabilities. They not only monitor energy consumption in industrial processes but also assess efficiency, detect irregularities, and trigger actions such as shutting down power or alerting critical failures via relay outputs. With combined AC and DC metering, they become a potent tool for managing energy consumption across diverse industrial applications.

Ultimate Performance

The EM235 PRO is SATEC's power meter specifically designed for advanced power applications. Equipped with waveform recording capabilities and a 16GB of storage, it serves as a powerful analyzer and event recorder. Its design places significant emphasis on user experience and intuitive navigation.

Applications

Marketing Materials

• PRO EM235 / PM335 Datasheet
• PRO Series Flyer
• SATEC Device Selection Guide
• SATEC Billing and Revenue Metering Catalog
• High Accuracy Current Censors (HACS) Datasheet
• 100A Hall Effect Split Core DC Current Sensor
• 1000A Hall Effect DC Current Sensor
• 2000A Hall Effect Split Core DC Current Sensor
• SATEC Voltage Ratio Module (VRM) for Direct Current Applications

Power Quality Monitoring

The EM235 PRO also serves as a power quality analyzer, with Class A / S compliance for power quality analysis, generating EN50160 power quality reports.

Harmonic Analysis: THD of voltage and current, custom alarming, TDD, K factor, Crest factor. Individual harmonics, up to the 63rd harmonic

Voltage Calculation, analysis & Recording: ½ cycle RMS calculation, symmetrical components, Voltage Dips/Sags, Interruptions, Swells, Unbalance, Transient and THD events recording

Waveform Capture: Provides simultaneous capture for all voltage and current channels with choice of sample rate, up to 256. Selectable pre-fault / post-fault recording length.

The EN 50160:2022 PQ recorder features:

• IEC 61000-4-30 class A performance compliance
• Monitoring, detecting and recording power quality incidents for all voltage characteristics listed by EN 50160:2022
• Collecting statistical information upon EN 50160:2022 indices including percentiles, maximum values over a period of time and indicative statistics for voltage events
• Printable EN 50160:2022 compliance reports with selectable voltage characteristics, accompanied by optional user information and company logo
• Configurable power quality indices including compliance limits, hysteresis and weekly/daily percentiles in accordance with the requirements of the particular installation

Plug-In Modules & External Accessories

SATEC EM235 PRO enables the utilization of up to 4 expansion modules simultaneously, allowing the user to adjust the PRO meter to any required application.
Modules are no longer mutually exclusive.

Digital & Analog I/O Options

• Built-in I/O:
  • 2 digital inputs
  • 1 SSR output
  • 1 analog input
• Add-on I/O:
  • Up to 3 add-on I/O modules

Module Configuration

• Up to 4 Expansion Modules Side by Side
• Up to 2 expansion modules: self-energized
• 3 expansion modules: requires additional module of AUX power supply

Automation & Control Modules

Auxiliary Power Supply Module

Direct Current Accessories

Tech Specs

• • Multi-Functional 3-Phase Power Meter

    • Class 0.2S IEC 62053-22 / Class 0.2 ANSI C12.20 four-quadrant active and reactive energy polyphase meter
    • Real time ½ cycle true RMS calculation of voltage, current, power, power factors, demand, energy, unbalance and neutral current
    • Vector diagram and symmetrical components
    • Precise Energy and Power Demand Meter:
      • 16 Summary (totalization) and TOU energy and demand registers for substation energy management
      • Accumulation of energy pulses from external watt-meters
      • Block and sliding demands
      • Harmonic demands
      • Up to 64 energy sources

  • Revenue Metering (Billing)

    • Advanced Time Of Use (TOU) features for complex billing schemes:
      • 16 Energy sources include external digital pulses
      • up to 4 seasons
      • 4 daily profiles
      • 8 Tariffs
      • Flexible automatic calendar
      • Internal or external tariff control
    • Class 0.2 per IEC 61557-12 (PMD standard)
    • Anti-tamper enclosure and protection seals
    • Expertpower client for MODBUS/TCP communication with either a Remote or Local (Stand Alone) SATEC Expertpower server

• Power Quality Analyzer

  • Class A (Edition 3.1) PQ analyzer per IEC 61000-4-30
  • EN50160 reports
  • Screen display of waveforms and power quality data
  • Up to 0.0001 Hz resolution
  • Leakage current detection via 4th current input
  • Harmonic Analyzer:
    • up to 63rd harmonic for volts and amps
    • directional power harmonics and power factor
    • phasor
    • symmetrical components
  • THD of voltage and current, custom alarming, TDD, K factor, Crest factor
  • Voltage analysis: ½ cycle RMS calculation, symmetrical components, Voltage Dips/Sags, Interruptions, Swells, Unbalance, Transient and THD event recording
  • Selectable pre-fault / post-fault recording length
  • Waveform capture and recording up to 256 samples/cycle:
    • 8 Fast Waveform recorders: 7-channel (V1-V3, I1-I4) simultaneous recording
    • selectable AC sampling rate of 32, 64, 128 or 256 samples per cycle
    • 20 pre-fault cycles
    • synchronized waveforms from multiple devices in a single plot
    • PAS software supports exporting waveforms in COMTRADE and PQDIF file formats

• • AC Measurements

    EM235 PRO offers fully isolated AC inputs for connecting to AC feeders:

    • Three isolated AC voltage inputs (Rating: 10-1000V AC (L-L) @ 50/60 Hz)
    • Four isolated AC current inputs

  • DC Measurements

    EM235 PRO measures DC voltage and current, calculating DC Power.

    • DC Current Metering
      • Four isolated 40mA DC current inputs (the HACS model)
      • up to 4000A DC (via Hall Effect sensors)
      • DC Current Accuracy - 0.2%
    • DC Voltage Metering
      • Three isolated DC voltage inputs (from 10 to 820V DC)
      • Optional: up to 3000V DC via Voltage Ratio Module (VRM)
      • DC Voltage Accuracy - 0.2%

• Current Inputs Options

  • Standard 1A or 5A current inputs
  • Flex Clamp:
    • 200A/2V
    • 30A-300A-3000A/3V Rogowski coil
  • 40mA inputs, designed for:
    • SATEC HACS CTs
    • DC metering: Current Measurements using Hall Effect Sensors
  • RS5: Special 5A input for 5A clip-on HACS for retrofit installation on existing MV/HV CT secondary.
  • GWP interface (current and voltage): 225mV inputs, interfacing Greenwood Power's MV sensors

• Programmable Logical Controller

  • 64 control setpoints with programmable operate and release delays
  • Setpoint using OR/AND logic, extensive triggers, programmable thresholds and delays
  • 16GB memory for recording billing data, PQ logs, data logs, event logs and waveforms
  • 16 fast Data Recorders (16 parameters on each data log): From ½ cycle RMS to 2 hour RMS envelopes; programmable data logs on a periodic basis and on internal or external trigger
  • 32 digital counters for counting pulses from external sources and internal events
  • Up to 26 external digital triggers from protection relays; onboard zero-sequence currents and volts, current and voltage unbalance; fault waveforms and fast RMS trace; cross triggering between multiple devices via digital inputs for synchronous event capture and recording
  • 16 programmable timers from 1/2 cycle to 24 hours for periodic recording and triggering operations on a time basis
  • Event-driven data recording, cross triggering between multiple devices via ethernet for synchronous event capture and recording - up to sixteen triggering channels
  • ½-cycle response time
  • 1-ms resolution for digital inputs
  • TCP notification client for communicating with a remote MODBUS/TCP server on events or periodically on a time basis, with any IP enable communication port
  • Event recorder for logging internal diagnostics events, control events and I/O operations

• • Optional Built-In I/O Ports

    • 2 optically isolated inputs, 24V DC dry contact; programmable de-bounce time from 1ms to 1s; control setpoints, 1pps time synchronization; 1ms sampling rate
    • 1 Solid State Relay output; unlatched, latched and pulse operations, fail-safe operation for alarm notifications; programmable pulse width; direct remote relay control through communications
    • 1 optically isolated analog input; 1mA to 20mA

  • Modular Expansion Options

    • Up To 4 Expansion Modules Side By Side
      • Up to 2 expansion modules: self-energized
      • 3 expansion modules: requires AUX power supply module
    • 8 DI - 8 optically isolated digital input options:
      • Dry contacts
      • 24/48/125/250V AC/DC wet inputs. Programmable de-bounce time from 1ms to 1s; 1ms sampling rate; control setpoints, pulse counters and Energy / TOU sub-system, 1pps time synchronization; 1ms sampling rate
    • 4 RO - 4 relays: Electro-Mechanic (EMR) or Solid State (SSR) relay option. Unlatched, latched and pulse operations, fail-safe operation for alarm notifications, programmable pulse width and direct remote relay control through communications
    • Auxiliary Power Supply:
      • 88-264V AC
      • 125-300V DC

• Standard Communication Ports

  • Serial communication port; RS-485, up to 115,200 bps, MODBUS RTU/ASCII, DNP3.0 and IEC 60870-5-101 protocols
  • 2 x Ethernet 10/100 Base-T port, supporting MODBUS/TCP, DNP3.0/TCP, IEC 60870-5-104 and IEC 61850 protocols, up to 10 non-intrusive simultaneous connections per Ethernet port
  • Infrared port (19,200 bps) supporting MODBUS RTU/ASCII, DNP3.0 protocols and IEC 62056-21 for local meter data exchange
  • USB 2.0 port (type C)

• Communication Protocols

  • IEC 61850
  • Modbus RTU/TCP
  • ASCII
  • DNP 3.0/TCP
  • IEC 60870-101/104

• Real Time Clock

  • Built-in clock and calendar functions
  • Typical error ±15 seconds per month / < 5 minutes/year @ 25˚C
  • 1ms synchronization over SNTP
  • Internal clock with battery backup for three years retention time

• Meter Security

  • Three-level Password security for protecting meter setups and accumulated data from unauthorized changes
  • Anti-tamper design

• Compliance

  The PRO series is designed to comply with standards:

  • IEC/AS 62052-11
  • IEC 62053-22/24
  • IEC 61557-12 (PMD-Sx)
  • EN 50470
  • WELMEC 7.2
  • MID MI-003
  • ANSI C12.1/20
  • UL Listed

• • Power Supply

    • Standard: 57.7-277V AC / 48-290V DC
    • AUX: 88-264V AC / 125-300V DC
    • DC AUX: 24V DC (9-36V DC)

  • Mounting & Display

    • DIN35 form factor
    • 1.77” LCD TFT color Display, 120 x 160 dots resolution