Finder 7E.85.8.400.0312 – 7E Series Energy Meters

Why Choose the Finder 7E.85.8.400.0312 Three-Phase Energy Meter?

The Finder 7E.85.8.400.0312 is an advanced three-phase multifunction, bi-directional energy meter designed for accurate electricity monitoring, industrial energy management and building automation. Part of the Finder 7E Series, this MID-certified digital electricity meter combines high-precision energy measurement, dual-tariff recording, an integrated M-Bus communication interface and two S0 pulse outputs in a compact DIN rail-mounted enclosure.

Designed for use with external current transformers (CTs), the Finder 7E.85.8.400.0312 supports a 1 A reference current and 6 A maximum measuring input, allowing the monitoring of substantially higher installation currents through appropriately selected and configured CTs. Its programmable transformer ratio supports installations with primary currents up to 10,000 A, making it suitable for industrial distribution boards, commercial electrical installations and energy-intensive manufacturing facilities.

The meter supports three-phase three-wire and three-phase four-wire electrical systems, with a nominal supply of 3 × 230/400 V AC. Its illuminated LCD display provides access to active and reactive energy, voltage, current, power, power factor, frequency and harmonic distortion information. With accuracy class 0.5S / MID Class C, import and export energy recording, M-Bus remote communication and two-tariff operation, this Finder energy meter offers a comprehensive solution for professional electricity monitoring and consumption analysis.

Key Advantages

• MID-certified energy measurement for applications requiring a compliant electricity meter, subject to applicable metering regulations.
• Class 0.5S / MID Class C accuracy provides precise active energy measurement.
• Bi-directional metering separately records imported and exported electrical energy.
• Dual-tariff functionality supports electricity consumption monitoring across two tariff periods.
• Integrated M-Bus communication enables remote meter reading and connection to compatible building management systems.
• Two S0 pulse outputs support integration with pulse counters, monitoring equipment and automation systems.
• Current transformer operation allows measurement of high-current installations without routing the main load current through the meter.
• Programmable CT ratio supports applications with primary currents up to 10,000 A using suitable transformers.
• Three-phase three-wire and four-wire compatibility provides installation flexibility.
• Backlit LCD display provides convenient local access to electrical measurements.
• Multifunction electrical monitoring includes voltage, current, active power, reactive power, apparent power, frequency and power factor.
• Total harmonic distortion measurement helps identify voltage and current waveform distortion.
• Maximum demand monitoring supports electrical load analysis and energy management.
• Compact four-module DIN rail housing saves space in electrical distribution boards.
• IP51 protection rating provides protection suitable for specified indoor installation conditions.
• Wide operating temperature range supports demanding industrial and commercial environments.

Key Features

• Finder 7E Series multifunction energy meter.
• Type 7E.85 three-phase digital electricity meter.
• Bi-directional active and reactive energy measurement.
• MID Class C certification.
• Class 0.5S active energy accuracy according to the applicable measurement standard.
• 1 A reference current / 6 A maximum current.
• External current transformer connection.
• Programmable CT primary current up to 10,000 A.
• Nominal voltage of 3 × 230/400 V AC.
• 100–277 V AC line-to-neutral operating range.
• 100–480 V AC line-to-line operating range.
• 50/60 Hz operating frequency.
• Three-phase three-wire and four-wire configurations.
• Two selectable electricity tariffs.
• Integrated M-Bus interface compliant with EN 13757-3.
• Two S0 pulse outputs, including a programmable output.
• Backlit eight-digit LCD energy display.
• Front-panel programming and navigation buttons.
• Voltage, current and power measurements for comprehensive electrical monitoring.
• Power factor, frequency and harmonic distortion measurements.
• Maximum demand measurement.
• 35 mm DIN rail mounting according to EN 60715.
• Four-module housing width of approximately 72 mm.
• IP51 protection rating.
• Operating ambient temperature range of −40 to +70 °C.
• Sealable terminal covers for metering installation security.

Advanced Three-Phase Energy Monitoring, M-Bus Communication and Dual-Tariff Measurement

The Finder 7E.85.8.400.0312 is designed to provide detailed electrical consumption information in industrial and commercial installations. Unlike a basic kilowatt-hour counter, this multifunction energy meter measures a broad range of electrical parameters, allowing engineers and energy managers to understand how electricity is being consumed, distributed and returned to the supply network.

Its bi-directional measurement capability allows the meter to record both imported and exported electrical energy. This is especially valuable in installations incorporating on-site electricity generation, such as photovoltaic systems, where electrical energy may flow in either direction. Separate import and export measurements support more detailed energy analysis and reporting.

The meter operates with external current transformers, rather than carrying the main installation current directly through its measuring terminals. With a 1 A reference current and 6 A maximum current input, the device can monitor high-current installations when used with correctly selected and configured CTs. The programmable transformer ratio supports primary currents up to 10,000 A.

The dual-tariff function enables energy consumption to be recorded across two tariff periods. This is useful for installations where electricity is charged at different rates according to operating schedules, time periods or energy supply arrangements. The tariff configuration should be matched to the actual metering and control requirements of the installation.

A key feature of the 7E.85.8.400.0312 variant is its integrated M-Bus communication interface. M-Bus is widely used for remote meter reading in commercial buildings, industrial facilities and energy management systems. The interface supports the EN 13757-3 protocol, allowing compatible systems to collect electrical measurement data without relying solely on manual display readings.

The meter also includes two S0 pulse outputs. These provide additional integration options for external pulse counters, building management systems and monitoring equipment. One output is programmable, offering flexibility when configuring the energy monitoring system.

Its backlit LCD display provides local access to key electrical measurements. The available information includes phase and line voltages, phase currents, active power, reactive power, apparent power, power factor and frequency. Energy totals can be used to analyse electrical consumption over time, while the additional measurement functions support investigation of electrical load conditions.

The Finder 7E.85 also provides total harmonic distortion measurements for current and voltage. These measurements can help identify waveform distortion associated with non-linear loads such as variable speed drives, electronic power supplies and industrial power conversion equipment. Maximum demand monitoring provides further information for assessing electrical load peaks.

With MID Class C certification and Class 0.5S active energy accuracy, the meter is designed for applications requiring dependable electrical energy measurement. The relevant national regulations, installation conditions and certification requirements must be checked before using the meter for billing or other legally controlled metering applications.

The four-module DIN rail housing allows the meter to be installed within electrical distribution boards and industrial control panels. Its compact dimensions, sealable terminal covers and IP51 protection rating make it suitable for properly designed indoor electrical installations. The specified operating temperature range of −40 to +70 °C supports use in demanding environments.

For correct operation, the installer must configure the appropriate three-phase wiring system, current transformer ratio, tariff settings and M-Bus communication parameters. CT polarity, phase sequence and voltage connections are particularly important for accurate import and export measurement. Installation and commissioning should be carried out by a suitably qualified electrical professional in accordance with Finder's instructions and applicable electrical regulations.

Typical Applications

• Industrial three-phase electricity consumption monitoring.
• Commercial building energy management systems.
• Factory and manufacturing plant electrical monitoring.
• Electrical distribution boards and sub-metering installations.
• Building management systems using M-Bus communication.
• Industrial energy efficiency and consumption analysis.
• Photovoltaic installations requiring import and export energy measurement.
• High-current installations using external current transformers.
• Dual-tariff electricity consumption monitoring.
• Industrial machinery and production line energy measurement.
• Commercial and industrial tenant sub-metering, where permitted.
• Energy management and monitoring dashboards.
• Remote electricity meter reading systems.
• Industrial power factor and harmonic distortion monitoring.
• Electrical load and maximum demand analysis.
• Energy reporting and operational cost monitoring.