In industrial power distribution, commercial buildings, and energy retrofit projects, engineers often need to monitor multiple points within limited space. Traditional meters are bulky, complex to install, and lack flexibility in current sensor selection — Rogowski coils, voltage-output CTs, and conventional 5A CTs often require different hardware versions, leading to lengthy selection processes and high inventory costs.

The Roc231 is a DIN-rail three-phase multi-function energy meter designed for compact distribution boxes, switchgear, and distributed energy monitoring. It supports direct connection to Rogowski coils, voltage-output CTs, and conventional CTs, offering 0.5S class active energy accuracy, comprehensive power quality analysis (harmonics, demand, multi-tariff, alarms), and standard Modbus-RTU communication. One meter meets the majority of metering requirements from low-voltage branch circuits to medium-voltage secondary sides.

Core Advantages: Flexible, Compact, All-in-One

1. Flexible Current Sensor Compatibility – One Model for All Scenarios

The Roc231 supports Rogowski coils (no external integrator needed), voltage-output CTs, and conventional 5A current transformers directly connected. This means:

• Retrofit projects: No power shutdown or rewiring – simply clamp the Rogowski coil around cables or busbars, reducing installation time by over 80%.
• New installations: Freely choose sensors according to current range, covering from 5A up to 6000A.
• Spare parts management: Only 1–2 models need to be stocked to handle most site requirements.

Technical support:

• Rogowski coil input: Supports sensitivities such as 22.5mV/kA, 50mV/kA, 85mV/kA, 100mV/kA.
• Voltage-output CT input: 0–7A AC.
• Voltage input: Direct connection 0–600VAC (phase voltage), max 720VAC.

2. Standard DIN-Rail Mounting + Compact Design – Fits Any Cabinet

The Roc231 uses 35mm DIN-rail snap-on mounting with a width of only 72mm (4P) and moderate depth, easily deployed in space‑limited floor distribution boxes, drawer‑type switchgear, or small outdoor metering enclosures. No panel cutout required – just clip onto the rail for instant fixing, drastically reducing assembly time for panel builders and field engineers.

• Dimensions: Standard DIN-rail meter size (refer to datasheet)
• Mounting: 35mm DIN rail, snap‑on fixing
• Light weight, suitable for high‑density deployment

. Rich Measurement and Advanced Functions – More Than Just an Energy Meter

The Roc231 not only provides basic three‑phase voltage, current, power, frequency, and power factor data, but also integrates:

• Harmonic analysis: 1st to 50th harmonic percentage and magnitude for voltage and current, including THD, TOHD and TEHD.
• Demand calculation: Fixed or sliding interval; records active, reactive and apparent demand with peak demand timestamp.
• Multi‑tariff energy (6 tariffs): RTC‑scheduled or manual switching, ideal for time‑of‑use billing.
• Alarm output: Configurable thresholds for overcurrent, overvoltage, harmonic exceedance etc., with relay output association.
• Digital input + relay output + energy pulse output – easy integration with external status monitoring, alarm control, and pulse counting.

Accuracy class:

• Active energy/power: IEC 62053‑22 Class 0.5S
• Reactive energy/power: IEC 62053‑21 Class 1S
• Voltage: ±0.2% (60V–600V)
• Current: 0.1% + sensor accuracy
• Frequency: ±0.01Hz

Performance at a Glance: Key Parameters and Their Real‑World Benefits

• Active energy Class 0.5S, voltage ±0.2%, current 0.1%+sensor accuracy
  Meets IEC billing-grade accuracy – can be used for electricity cost settlement. High measurement precision ensures credible before/after comparisons for energy‑saving retrofits.
• Rogowski coil measurement 5A to 6000A; direct CT input up to 7A
  Covers everything from low‑voltage branch circuits to medium‑voltage incomers with one meter – drastically reduces spare part types across the plant.
• 1st to 50th harmonic analysis (THD, TOHD, TEHD) with percentage and magnitude
  Quickly identifies harmonic pollution from VFDs, UPS, LEDs and other non‑linear loads – provides basis for filter design and extends transformer/cable life.
• Multiple power supply options: 95–265VAC / 9‑36VDC / 90‑528VAC
  Adapts to different site power standards worldwide – standard industrial AC, low‑voltage DC (instrument cabinets/EV chargers), ultra‑wide AC (mines/outdoor) – no extra power module needed.
• Operating temperature -20℃ to +70℃, storage -40℃ to +85℃
  Reliable in high‑temperature summer switchgear or cold winter outdoor enclosures – long‑term maintenance‑free operation.
• DIN-rail mounting, 72mm width
  Compatible with all standard 35mm rails – no cabinet modification needed. Single person, one‑minute fixing – dramatically reduces panel assembly man‑hours.
• RS485 Modbus‑RTU, baud rate up to 115200bps
  Direct connection to PLC, SCADA, energy management systems – no additional gateway required. High‑speed communication ensures timely refresh for large data points.
• 6‑tariff energy + demand calculation (fixed/sliding)
  Supports TOU billing and peak demand charge calculation – includes peak demand timestamps for load behavior analysis.
• Configurable alarms (overcurrent, overvoltage, harmonics, etc.)
  Can be linked to relay output for abnormal event alerts or automatic protection control – enhances distribution system safety.
• CAT III 1000V, CE, full IEC 62053 series certification
  Suitable for 277/480V secondary sides and meets international export requirements. Passes rigorous safety tests – protects maintenance personnel.

Typical Applications

1. Low‑Voltage Switchgear – Incomer and Feeder Metering

In factory, commercial building and data center LV rooms, the Roc231 mounts directly on DIN rails. Non‑invasive Rogowski coils avoid disconnecting busbars or cables. Data is aggregated via RS485 to power monitoring systems or EMS.

2. Medium‑/High‑Voltage Substation Secondary Side Monitoring

Using voltage transformers (VTs) and current transformers (CTs), the Roc231 can be safely connected to the secondary side of MV/HV systems. Its wide voltage measurement range and programmable PT/CT ratios (via Modbus) make it ideal for substation smart meter retrofits.

3. Power Quality Analysis for Ports, Mines and Heavy Equipment

Large motors, cranes and VFDs generate significant harmonics and unbalance. The Roc231 provides 1st–50th harmonic monitoring, unbalance and demand analysis – helping maintenance staff detect overload or distortion anomalies before unplanned downtime occurs.

4. Tenant Billing and Sub‑Metering in Commercial Buildings

Floor distribution rooms have limited space. The Roc231’s compact DIN-rail design fits easily. Combined with 6‑tariff capability, it accurately logs tenant consumption by time‑of‑use, supporting compliant utility billing.

5. Distributed Energy and EV Charger Monitoring

In PV grid cabinets, energy storage systems, or EV charger distribution boxes, the Roc231 monitors bidirectional energy (import/export), supports reactive power and harmonic analysis – helping optimize system operation and meet grid connection requirements.

Quality and Certifications

The Roc231 is designed and manufactured to meet international standards, with CE and IEC 62053 series certification as well as EN 61010‑1 safety compliance. Its EMC performance reaches Level IV (electrostatic discharge, EFT, surge), ensuring stable operation in complex industrial electromagnetic environments. The wide operating temperature range of -20℃ to +70℃ suits harsh outdoor switchgear environments.

About the Company

Our company has years of dedicated experience in Rogowski coils, power quality analyzers, smart meters and industrial IoT. We have full in‑house R&D capabilities – from core sensing elements to communication protocol stacks. Our products are widely used in electric power, manufacturing, infrastructure, commercial buildings and renewable energy projects, and we provide ODM and custom solutions to many multinational companies.

We believe that a great meter should deliver accuracy, flexibility and durability at the same time. The Roc231 embodies this philosophy – it turns a DIN-rail energy meter from a simple “number display” into a reliable sentinel for power management.

Start Your Precision Metering Journey Today

Whether you are designing a new distribution box or retrofitting an old panel, the Roc231 helps you reduce costs, shorten lead times and obtain trustworthy energy data with its DIN-rail quick installation, versatile sensor compatibility, and comprehensive power quality analysis.

Contact our sales team for the Roc231 datasheet, pricing and technical support. We look forward to working with you to build smarter, more efficient energy monitoring networks.