Products catalog

Home/Product Catalog/Automation and Control Systems/Automation control accessories/Energy meters/Three-phase electricity meters | energy metering devices
  • New item   Modular three-phase multifunction energy meter | remote reading | 3×230/400 V | RS485 | DIN | ESSDE330-C
    New item   Modular three-phase multifunction energy meter | remote reading | 3×230/400 V | RS485 | DIN | ESSDE330-C 1

    Modular three-phase multifunction energy meter | remote reading | 3×230/400 V | RS485 | DIN | ESSDE330-C

    Code: ESSDE330-C
    Inquire about this item
    Price 145.20 € VAT incl.
    ( 120.00 € VAT excl. )
    Want another price? Suggest yours!

    ESSDE330-C – a compact (36 mm wide) three-phase energy meter, CT operated via external current transformers and mounted on a 35 mm DIN rail. It measures energy in circuits up to 6000 A and transmits data over an RS485 interface to an energy management, SCADA or building automation system. Designed for energy monitoring in manufacturing plants, warehouses, commercial buildings and distribution cabinets, including environments with a wide temperature range.

  • Product description

    Modular three-phase multifunction energy meter | remote reading | 3×230/400 V | RS485 | DIN | ESSDE330-C

    ESSDE330-C – a compact (36 mm wide) three-phase energy meter, CT operated via external current transformers and mounted on a 35 mm DIN rail. It measures energy in circuits up to 6000 A and transmits data over an RS485 interface to an energy management, SCADA or building automation system. Designed for energy monitoring in manufacturing plants, warehouses, commercial buildings and distribution cabinets, including environments with a wide temperature range.

    Key idea:
    Direct-connected meters stop at 100 A – beyond that you need to measure through current transformers and collect the data automatically, because nobody wants to walk the workshop floor with a notebook any more. The ESSDE330-C is built precisely for that: current measurement through external CTs up to 6000 A, accuracy class 1.0S, an RS485 data line and a width of just 2 modules, so ten of these meters fit in a single panel. It has no display, and doesn't need one – readings are read from the system.
    Current measurement
    via external CTs, up to 6000 A
    Rated voltage
    3×230/400 V AC (up to 415 V), 50/60 Hz
    Communication
    RS485, 1200–38400 bps
    Accuracy class / mounting
    1.0S; 35 mm DIN rail

    How it works

    The meter measures voltage directly from the three phases and neutral, and current through external current transformers: the primary busbar or cable passes through the transformer window, and the meter's current terminals receive a proportional secondary current. Once the transformer ratio has been set, the meter calculates true power from the measured values and accumulates energy over a range of 0–999,999,999 kWh. This connection allows any size of incoming supply to be measured – from 100 A to 6000 A – without passing high current through the device itself.

    Data is transmitted over the RS485 interface – a two-wire industrial bus that lets several meters be connected to a single controller or gateway. The supported speed of 1200–38400 bps allows both long cable runs and fast polling. A controller, SCADA or energy monitoring application cyclically polls the meters and stores readings for history, reporting and cost allocation. Accuracy class 1.0S to IEC 62053-21 means the measurement stays accurate even at low load, not only at rated current.

    What makes the ESSDE330-C worthwhile?
    A single 36 mm module covers a three-phase supply or branch circuit of any size and joins an existing RS485 network without extra gateways. When ten lines need measuring in one panel, the space saved and the simplicity of a single data bus determine both the installation cost and the ongoing maintenance.

    Technical specifications

    Model ESSDE330-C
    Product type Three-phase multifunction energy meter, CT operated, modular
    Rated voltage 3×230/400 V AC (up to 415 V), 50/60 Hz
    Current measurement Via external CTs, up to 6000 A
    Communication RS485, 1200–38400 bps
    Accuracy class / mounting 1.0S; 35 mm DIN rail
    Communication protocol Per manufacturer datasheet
    Energy measurement range 0–999,999,999 kWh
    Display None – readings are read via RS485
    Operating temperature -20…+70 °C
    Dimensions (W x H x D) 36 x 89 x 74 mm (2 modules)
    Weight 120 g
    Standard IEC 62053-21
    Certificate CE
    MID certificate Not stated – check manufacturer datasheet

    Key features

    • Measurement via current transformers – any size of incoming supply up to 6000 A, without high current passing through the meter.
    • RS485 data transmission – several meters on one bus, at a speed of 1200–38400 bps.
    • Accuracy class 1.0S – reliable readings even at low load, to IEC 62053-21.
    • Large energy register – up to 999,999,999 kWh, suited to high-power sites without overflow.
    • Wide temperature range – -20…+70 °C, works in unheated and hot cabinets.
    • Compact enclosure – 36 mm wide, 120 g, dense layout in distribution panels.

    Where is it used?

    • Manufacturing plant supplies and workshop branch circuits with currents above 100 A
    • Energy monitoring in warehouses and logistics centres
    • Cost allocation for tenants of commercial buildings via a BMS
    • Distribution cabinets and busbar systems with many lines to measure
    • Energy metering for solar plant and generator supplies
    • Cost control for compressor rooms, refrigeration and ventilation equipment
    • Unheated outdoor cabinets and hot technical rooms
    • Data collection for energy management (ISO 50001) systems

    Use by need

    For the domestic user.
    In a household this meter is rarely used – it requires current transformers and an RS485 reading system. It makes sense only where the home already has a controller with an RS485 interface and there's a wish to monitor a solar plant or the overall supply balance without a display in the panel.
    For businesses and industry.
    This is the main field for a meter like this: one ESSDE330-C with a CT for every line, all connected to a single RS485 bus, with an energy monitoring application showing exactly how much each workshop or tenant consumes. The result is cost allocation based on fact, recognition of load peaks, and data for an energy management system.
    For electricians / engineers.
    Select the CT to match the line current (primary current close to the actual load, not the rating of the incoming breaker), observe CT polarity (P1/P2, S1/S2) and phase correspondence with the voltage terminals. Use screened twisted-pair cable for the RS485 line, with a termination resistor at the end; assign each meter a unique address and matching baud rate. Protect the voltage circuit with separate fuses.

    Practical example

    A metalworking company with a 630 A supply needs to measure three workshops separately. An ESSDE330-C with matching current transformers is fitted for each branch circuit (250 A, 200 A and 160 A), all three joined into a single RS485 line at 9600 bps and polled by the energy monitoring server every 60 s. After a month it emerges that the 200 A workshop consumes 18 kW overnight on no-load due to a compressor left running – fixing the schedule saves about 4,000 kWh a month.

    Pros

    • Supply of any size – measures up to 6000 A via CT, where direct-connected meters stop at 100 A.
    • Industrial RS485 bus – several meters on one line to a controller or SCADA.
    • 1.0S accuracy – reliable even at low loads, suited to cost allocation.
    • Just 36 mm – ten lines in the same panel without an extra enclosure.
    • -20…+70 °C – works in outdoor and technical cabinets without extra protection.
    • Large register – 999,999,999 kWh, overflow is not a risk even for high-power sites.

    Cons / limitations

    • No display – readings cannot be seen without an RS485 reading system.
    • RS485 only – there is no Wi-Fi or other wireless link; data reaches the cloud only via a gateway.
    • Current transformers are required – extra cost, panel space and the need to set the correct CT ratio.
    • MID certificate is not stated in the manufacturer's data – check the manufacturer datasheet for billing metering with a supplier.
    • Communication protocol, number of tariffs and secondary CT current are not detailed in the source – check the datasheet before designing.

    Safety and installation notes

    • Never leave a CT secondary circuit open while current is flowing in the primary – a dangerous voltage appears at the terminals; short-circuit the CT before disconnecting the meter.
    • Observe CT polarity and phase correspondence – a swapped phase or direction gives incorrect (even negative) power.
    • Protect the voltage measuring circuit with separate fuses or a breaker; the meter does not protect either the wiring or the equipment.
    • Use screened twisted-pair cable for the RS485 line, connect A/B in series (daisy chain), and fit termination resistors at the ends.
    • Set the CT ratio, meter address and baud rate before commissioning, and verify the readings against a known load.
    • The meter operates over -20…+70 °C, but leave room for cooling between modules near the upper limit.

    Quick selection guide

    Current measurement
    via external CTs, up to 6000 A
    Rated voltage
    3×230/400 V AC (up to 415 V), 50/60 Hz
    Communication
    RS485, 1200–38400 bps
    Accuracy class / mounting
    1.0S; 35 mm DIN rail
    Suitable when you need:
    • to measure three-phase lines above 100 A via current transformers;
    • automatic reading over RS485 into a BMS, SCADA or energy monitoring system;
    • many meters in one panel, where every module counts.
    Check before use:
    • whether suitable CTs have been selected to match the actual line current and the meter's secondary input;
    • whether an RS485 reading device is available and the protocol and speed match;
    • whether the mains voltage does not exceed 415 V;
    • whether the site requires an MID certificate – if so, check the datasheet.
    Important reminder:
    Without an RS485 system, this meter will not show any readings – it's a monitoring component, not a standalone device. Only an MID-certified meter is suitable for billing a supplier, and a CT secondary circuit must never be opened while under load.

    FAQ

    Can it be connected directly, without current transformers?
    No – current is measured only via external CTs; only the voltage circuit is connected directly.
    How can readings be seen if there is no display?
    Via RS485 – in a controller, gateway or energy monitoring application that polls the meter.
    How many meters can be joined on one RS485 line?
    Several – as many as the protocol and line length allow; each is assigned a unique address.
    Is it suitable for billing an energy supplier?
    That requires an MID certificate, which is not stated in the manufacturer's data – check the manufacturer datasheet; it is suitable for internal cost allocation.
    What does class 1.0S mean?
    Accuracy of ±1% even at low load (S – "special" under IEC), not only at rated current.
    Will it work in an unheated outdoor cabinet?
    Yes, the operating temperature is -20…+70 °C, but the cabinet must be free of condensation.

    Modular three-phase multifunction energy meter | remote reading

    ESSDE330-C – a modular three-phase multifunction energy meter, 3×230/400 V, CT operated up to 6000 A, accuracy class 1.0S to IEC 62053-21, with an RS485 interface at 1200–38400 bps and a 36 mm DIN enclosure, operating over -20…+70 °C. Designed for energy monitoring in manufacturing, warehouses and commercial buildings, where readings are collected automatically into a BMS, SCADA or energy management system.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

  • Alternative products

  • Subscribtion to new arrivals

    privacy policy

    Information