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Energy meters for billing purposes

Energy meters with MID approval for billing purposes enable cost-center-specific energy data billing. EMpro AC energy meters record all key electrical parameters such as currents, voltages, power factors, power ratings, and energy values in all four quadrants via direct connection or current transformers. The EMpro DC energy meter enables the direct measurement of currents and voltages with up to 650 A/1,000 V DC. The measurement data is provided via standard communication interfaces.

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Go to Product Detail Page for item 1311993
EEM-EM157-EE - Measuring instrument
EEM-EM157-EE - Measuring instrument
1311993

This device is a digital single-phase electric energy measuring device, suitable for measuring active power in the 230 V / 45 A power grid by the method of direct measurement, with 2 pulse outputs, RS-485 interface, and operating temperature up to +70°C, certified in accordance with the MID directive.

Go to Product Detail Page for item 1311985
EEM-EM357-EE - Measuring instrument
EEM-EM357-EE - Measuring instrument
1311985

This device is a digital three-phase electric energy measuring device, suitable for measuring active power by direct measurement in the power grid not exceeding 480 V / 100 A, with 2 pulse outputs, RS-485 interface, and operating temperature up to +70°C, certified in accordance with the MID directive.

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DC energy meter with calibration approval on a DIN rail

DC energy meters with calibration approval

Designed for charging infrastructure

The extremely compact EMpro DC energy meter enables the space-saving, direct measurement of currents and voltages up to 650 A/1,000 V DC. The proven RS-485 interface and calibration approval are ideal for billing purposes in charging infrastructure.

Main features

  • Measurement of up to 650 A/1,000 V DC
  • Accuracy class B (EN 50470-3)
  • Dimensions: 107.2 mm x 116 mm x 67 mm
  • Operating temperature: -40°C … +80°C
  • SLIP interface with OCMF data format
  • Cable-loss compensation
  • In accordance with VDE-AR-E-2418-3-100

Your Advantages

  • DC direct measurement without converter with a space-saving design
  • High reliability with a maximum permissible operating temperature of +80°C
  • Simplified point-to-point protocol with a standardized e-mobility data format
  • Calibration approval for billing purposes
  • Ideal in combination with the CHARX DC charging controller

Energy meters for billing purposes in comparison Overview of DC and AC energy meters

Find the right energy meter for your application

DC energy meter
AC energy meter
DC energy meter

For direct measurement

AC energy meter

For direct measurement or via current transformer

Maximum input current 650 AC Direct measurement: 40 A AC (1-phase); 63 A / 80 A AC (3-phase)
    Current transformer: 1A / 5 A AC (3-phase)
Input voltage range 1,000 V DC 1-phase: 1 x 184 V … 276 V
    3-phase: 3 x 184 V … 288 V (320 V … 500 V)
Tariff input (digital) No Yes
Maximum measurement connection Yes No
  No Yes
Supply voltage M10 nut Alternating current energy meters: 1.5 mm² … 6 mm²
Connection method   Three-phase energy meter: 1.5 mm² … 35 mm²
Communication protocol 24 V DC (-20% … +50%) Supply from the measuring circuit
  Screw connection Screw connection
Communication interfaces SLIP Modbus/RTU
    Modbus/TCP
  3 x RS-485 (RJ12) RS-485
S0 output   Ethernet (RJ45)
Ambient temperature range   M-Bus
  No Yes
Compliance - 40°C … +80 °C - 25°C … +55°C (40 A AC / 63 A AC)
EMpro DC energy meters with calibration-law approval

DC energy meters with calibration approval

The compact EMpro DC energy meter enables the space-saving, precise, and tamper-proof direct measurement of currents and voltages of up to 650 A/1,000 V DC. The proven RS-485 interface with SLIP protocol in OCMF data format and calibration-law approval are ideal for billing charging processes in e-mobility.

Your advantages

  • Space-saving and accurate DC direct measurement up to 650 kW in a compact design
  • Ideal for billing purposes with calibration-law approval and tamper-proof electromechanics
  • High reliability with extended an temperature range from -40 to +80°C with adjacent heatsink with integrated shunt measurement
  • Simple communication of measurement data to higher-level control systems via standardized plug-and-play connection
  • Ideal for e-mobility charging processes with the OCMF data format, digital compensation of cable power loss, and interaction with the CHARX DC charging controller

DC energy meters with calibration-law approval – your advantages in detail

EMpro DC energy meters with calibration-law approval
EMpro DC energy meters with calibration-law approval
EMpro DC energy meters with calibration-law approval
EMpro DC energy meters with calibration-law approval
EMpro DC energy meters with calibration-law approval
EMpro DC energy meters with calibration-law approval

The DC energy meter enables the measurement of direct current and voltages up to 650 A/1,000 V in accordance with accuracy-class-B (EN 50470-3), without the need for an additional current transformer. Connect live copper rails or cable lugs of circular conductors directly to the through-holes of the integrated busbars. The voltage is measured via a sensor line via the screw connection. Despite the compact dimensions of 107 (W) x 116 (H) x 67 (D) mm, it is possible to measure powers of up to 650 kW.

EMpro DC energy meters with calibration-law approval

For use in kWh-accurate billing systems, the DC energy meter has approval in accordance with Annex 4 Module B of the German Measurement and Calibration Regulation. The sealable housing covers for protecting the connection elements from unauthorized access and encrypted data transmission ensure manipulation detection. With the storage of the energy value data, permanent traceability of the charging processes is guaranteed. In addition, all events in the calibration log that have an impact on billing are recorded.

EMpro DC energy meters with calibration-law approval

Shunt measurement is integrated into the heatsink of the product, enabling reliable operation in an extended temperature application range from -40°C to +80°C. You can use the DC energy meter in all DC applications with outputs of up to 650 kW, even under extreme ambient temperatures.

EMpro DC energy meters with calibration-law approval

The integrated RS-485 interface with the simplified SLIP protocol (Serial Line Internet Protocol) enables the communication of measurement data to higher-level control systems. The standardized OCMF (Open Charge Metering Format) data format is ideal for billing purposes in charging infrastructure. Save cabling effort with the RJ12 connectors which facilitate the connection of several DC energy meters in series with a versatile design.

EMpro DC energy meters with calibration-law approval

Send billing-relevant data yourself in the standardized OCMF (Open Charge Metering Format) data format to end devices identified as being secure by compiling signed identification, meter, time, and private key values.

EMpro AC energy meters

AC energy meters with MID approval

EMpro energy meters with MID-certification in accordance with EN 50470 enable cost center-accurate energy data billing.
The measuring devices measure the important electrical parameters such as currents, voltages, power factors, and outputs, as well as energy values in all four quadrants. This provides you with information on the feed-in and drawing of active and reactive energy.
The data is transmitted to your higher-level control system via conventional communication interfaces: for example, an energy management system.

Your advantages

  • Easy bus and network connection via M-Bus, Modbus/RTU, or Modbus/TCP interface
  • Narrow on the DIN rail with widths of just 17.5 mm or 72 mm
  • Time and cost savings with versions for direct current measuring up to 40 A AC or 80 A AC
  • Remote data access, storage, and export with Ethernet-based devices

AC energy meters with MID approval – your advantages in detail

Woman and man talking in front of a PC screen
Two EMpro AC energy meters on a DIN rail, installed in a control cabinet
View over the shoulder of a person in front of a PC screen with web server for EMpro energy meters
Open AC charging station with eGolf in the foreground
Woman and man talking in front of a PC screen

With the MID-certified measuring devices of the EMpro product family, you can easily and cost-effectively measure energy data and bill energy consumption in accordance with the European Measuring Instruments Directive. The continuous data acquisition provides you with the basic data you need for your energy audit.

Two EMpro AC energy meters on a DIN rail, installed in a control cabinet

All product types are available either with a measurement input for an external current transformer or with an input for direct measurement. The current transformer measurement input is configurable for 1 A or 5 A transformers. The transformer ratio can also be configured. Currents up to 40 A or 80 A are captured directly via an internal current transformer.

View over the shoulder of a person in front of a PC screen with web server for EMpro energy meters

The integrated web server of the Ethernet-based measuring devices gives you remote configuration, remote data access, and energy data storage. The data can be downloaded manually or exported automatically via the FTP function.

Open AC charging station with eGolf in the foreground

Special versions of our EMpro AC energy meters are particularly suitable for collecting energy data for billing purposes in e-mobility charging stations. The Modbus/RTU register tables are optimized for communication with charging technology components.

Your advantages in charging infrastructure:

  • Direct measurement of charging currents up to 80 A AC
  • Space-saving with narrow overall width of just 17.5 mm or 72 mm
  • Designed for extreme temperatures up to +70°C
  • Billing of charging processes with MID approval
  • Fully bidirectional four-quadrant measuring for all energy and power values

Intelligent energy monitoring
Products and services for your energy management
Easy energy management: our innovative and coordinated portfolio of sensors and measuring technology can save you a great deal of effort when it comes to energy data acquisition. Future-oriented communication solutions and digital services help you to integrate, manage, and process your data.
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