Author Archives: LUOKECT LIMITED

In distributed energy monitoring, legacy panel retrofits, and edge metering scenarios, engineers often face two challenges: no available power supply for the meter (e.g., outdoor enclosures, EV chargers, temporary distribution points), and difficult wiring with high communication costs. Traditional energy meters require separate power cables and RS485 communication lines, leading to long installation times and high retrofit costs.

The Roc61 is a self-powered, built‑in WiFi three‑phase IoT energy meter designed specifically for edge nodes where “power is hard to get and wiring is a hassle”. It draws power directly from the measured circuit (85–265VAC) – no external power supply needed. Built‑in 2.4GHz WiFi supports MQTT protocol for direct cloud platform upload. The whole unit weighs only 59g and can be flexibly deployed in space‑limited distribution boxes. One meter makes wireless energy monitoring as easy as connecting a home router.

Core Advantages: Power, Connectivity, Installation – Three Steps Done

1. Self‑Powered Design – No External Supply, Install and Go

The Roc61 uses three‑phase self‑powering technology, drawing operating power directly from the voltage between V1/V2/V3 and VN, with a working range of 85–265VAC. This means:

• Retrofit projects: No need to find an auxiliary power terminal inside the panel – eliminates wiring steps.
• Outdoor scenarios: For light poles, EV chargers, small PV combiner boxes – no extra 220V supply line required.
• Cost savings: Saves one power module per meter and the associated wiring labor.

2. Built‑in WiFi + MQTT – Direct Wireless to the Cloud

The Roc61 features 2.4GHz WiFi (IEEE 802.11 b/g/n) and supports MQTT protocol, sending real‑time data directly to an IoT cloud platform (our platform or any other MQTT broker). No RS485 gateway, no 4G DTU – just a WiFi hotspot. Remote data viewing, alarm push, and firmware upgrades are all supported. The LED status indicator provides clear feedback: alternating red/green means network configuration in progress, fast green blinking means parameter config mode, and steady red means AP configuration mode.

3. Ultra‑Compact Size + Integrated Design – Fits Any Enclosure

The Roc61 measures only 75×37×24mm and weighs 59g – about the size of a lighter. The current sensors and metering module are integrated into one unit, easily fitting into tight distribution boxes, EV charger enclosures, or equipment cabinets. It supports five wiring modes (3P4W_3CT, 3P3W_3CT, 3P3W_2CT, 1P3W, 1P2W), compatible with most global low‑voltage systems.

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

Self‑powered 85–265VAC, no auxiliary supply needed
Draws power directly from the measured circuit – suitable for most single‑phase/three‑phase low‑voltage systems. No separate power cabling required, especially valuable for outdoor, elevated, or legacy panel retrofits. Saves about 30 minutes of installation labor per meter on average.

• Built‑in 2.4GHz WiFi, MQTT protocol
  Wireless range up to 30–50 meters indoors (depending on environment). Data goes directly to the cloud – no extra gateway or communication wires. Fast network configuration via mobile App (EspTouch). Long press the Reset button for 7 seconds to erase network settings and reconfigure.
• Ultra‑small size 75×37×24mm, weight only 59g
  Only 1/10 the volume of a traditional DIN‑rail meter. Can be placed inside already crowded enclosures or zip‑tied next to cable trays. Ideal for EV chargers, outdoor metering boxes, mobile distribution units, and other compact applications.
• Wide current range: Rogowski coil 0–12,000A, voltage‑output CT 0–99,999A
  One meter covers from small branch circuits (a few amperes) to main feeders (tens of thousands of amperes). Rogowski coils allow non‑invasive installation – no modification of existing busbars, safe and convenient.
• Active energy Class 0.5S (IEC 62053‑22), voltage ±0.2%, current 0.1%
  Billing‑grade accuracy – can be used for electricity cost settlement. High precision ensures credible data for energy‑saving retrofits or load analysis.
• 1st–50th harmonic analysis (THD, TOHD, TEHD), percentage and magnitude
  Real‑time monitoring of harmonic pollution from VFDs, UPS, LEDs, etc. Helps detect risks such as neutral overheating or capacitor bank damage early.
• 6‑tariff multi‑rate energy, demand calculation (sliding/fixed)
  Supports time‑of‑use billing and peak demand charge calculation – ideal for tenant sub‑metering and commercial/industrial energy storage optimization.
• Operating temperature -25℃ to +70℃, IP20 protection
  Reliable in high‑temperature summer switchgear or cold winter outdoor enclosures. 12‑month warranty.
• International standards: CE, IEC 62053, EN 61010‑1
  Passes multiple EMC tests (ESD Level IV, surge Level IV) – stable operation in harsh industrial electromagnetic environments.

Typical Applications

1. Edge Node Metering (EV Chargers, Street Lights, Outdoor Cabinets)

For EV chargers, smart street lights, outdoor communication cabinets, etc., there is often no dedicated meter power supply and wiring is difficult. The Roc61 draws power directly from the charger input side, connects via WiFi to a local hotspot (or mobile phone hotspot), and reports charging energy, power, and current data to the O&M platform, helping operators with remote billing and fault alerts.

2. Legacy Factory Panel Retrofits – No Circuit Changes, No Extra Wiring

Many factory panels older than 20 years have no free space and cannot be de‑energized for retrofits. The Roc61’s tiny size allows it to be zip‑tied in an unused corner. Rogowski coils clamp onto busbars without disconnecting existing wiring. Self‑powering eliminates the need to find an auxiliary supply. WiFi data can be sent to an industrial router or mobile hotspot placed outside the panel, achieving low‑cost digital upgrades.

3. Temporary Power Monitoring (Exhibitions, Construction Sites, Events)

Temporary distribution points (exhibition booths, site temporary power, event broadcast vans) need short‑term monitoring but cannot justify expensive fixed meters. The Roc61 is plug‑and‑play: connect voltage wires to the breaker output side, clamp on current coils, and view real‑time power and energy on a mobile phone. Data can be uploaded to the cloud, supporting multi‑site centralized viewing. When the event ends, simply remove the device.

4. Commercial Building Tenant Sub‑Metering

Floor distribution rooms often lack space for standard DIN‑rail meters. The Roc61 can be placed directly inside cable trays or wire ducts. WiFi sends each tenant’s energy data to the property cloud platform, supporting 6‑tariff time‑of‑use billing. No RS485 bus wiring needed – dramatically reduces retrofit cabling costs.

5. Small PV and Energy Storage System Monitoring

Residential rooftop PV or commercial/industrial storage systems typically need bidirectional energy monitoring at the grid connection point. The Roc61 supports forward/reverse active energy metering, recording both generation (Export) and grid purchase (Import). Through WiFi to the home router, users can view real‑time generation power and revenue on a mobile App. Harmonic monitoring also helps verify inverter output quality.

Configuration & Commissioning – Done Wirelessly

The Roc61 offers two wireless configuration methods:

• Cloud network configuration: Use the mobile App (EspTouch) to scan the device QR code, enter the WiFi password, and complete configuration. The LED changes from alternating red/green to steady green, indicating successful connection.
• Local AP configuration: Briefly press the Reset button for 1.5 seconds to enter AP mode. Connect your phone to the hotspot “MC61-SN” (password 12345678). Open a browser to 192.168.4.1 to access the configuration page, where you can modify wiring mode, CT ratio, voltage range, and other parameters.

After all parameters are set, restart the device to apply the changes. Cloud platform address: https://overall.iot-safe.com/ – supports real‑time data monitoring, historical curves, report export, and more.

Quality and Certifications

The Roc61 is designed and manufactured to meet international standards, with CE certification, compliance with IEC 62053‑22 (Class 0.5S) , IEC 62053‑21 (Class 1) , EN 61010‑1, and others. Its EMC performance reaches IEC 61000‑4 highest level (Level IV) , ensuring stable operation in harsh industrial environments with VFDs, welders, etc. Operating temperature -25℃ to +70℃, storage -40℃ to +85℃ – suitable for demanding outdoor distribution applications.

About the Company

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 the best IoT meter should require no external power, no complex wiring, and be ready to use out of the box. The Roc61 embodies this philosophy – it turns traditional energy meters from “cabled burdens” into “wireless nodes”, making energy data accessible anytime, anywhere.

Start Your Wireless Energy Monitoring Journey Today

Whether you are retrofitting old panels, deploying EV charger networks, or conducting short‑term energy audits, the Roc61 helps you reduce installation costs, shorten deployment time, and access energy data anytime with its self‑powered, built‑in WiFi, and ultra‑compact size.

Contact our sales team for the Roc61 datasheet, pricing, and cloud platform trial accounts. We look forward to working with you to build smarter, more convenient energy monitoring networks.

In industrial power distribution, commercial buildings, and renewable energy sites, power quality issues (harmonics, sags/swells, unbalance) are becoming increasingly prominent. Traditional portable analyzers are expensive and unsuitable for long-term deployment, while ordinary energy meters lack waveform recording and event analysis capabilities. Engineers often find themselves caught between “too costly” and “not accurate enough.”

The RocPQD is a DIN-rail three-phase power quality analyzer designed for long-term online monitoring and professional field testing. It supports Rogowski coils and voltage-output CTs for non‑invasive installation, features a built‑in 32GB memory card for programmable interval data logging and waveform capture, and comes standard with RJ45 Ethernet and RS485 dual communication interfaces (Modbus‑TCP/RTU). One device covers everything from energy metering to comprehensive power quality analysis.

Core Advantages: Accurate, Persistent, Easy to Integrate

1. Non‑Invasive Installation + Wide Current Range – Zero Downtime for Retrofits

The RocPQD connects directly to Rogowski coils (no external integrator required) or voltage‑output CTs – no cable or busbar disconnection needed. Rogowski coils support a wide current range from 100A up to 12,000A, covering everything from branch circuits to main incomers. For projects where power cannot be shut down, installation time can be reduced by more than 80%, and no existing equipment needs to be replaced.Technical support:

• Voltage input: 0–600VAC (phase‑to‑neutral), max 720VAC
• Rogowski coil input: Supports sensitivities such as 50mV/kA, 85mV/kA, 100mV/kA
• Measurement accuracy: Voltage ±0.2%, Current 0.2% + sensor accuracy, Active energy Class 0.5S

2. 32GB Local Storage + Multi‑Function Recording – Data Never Lost

The RocPQD is equipped with a 32GB TF card and supports three recording modes:

• Data Logger: Records basic data (voltage, current, power, energy, harmonics, unbalance, etc.) at intervals from 5 seconds to 9999 seconds. Duration can be set from 1 hour to “Max” (continuous recording).
• Waveform Recorder: Sampling rates from 1kHz to 8kHz, duration from 5 to 40 seconds – captures real‑time three‑phase voltage and current waveforms.
• Event Recording: Automatically records voltage sags, swells, interruptions, frequency excursions, harmonic exceedances, etc., including start time, duration, and magnitude.

All recorded files are in CSV format and can be exported via USB flash drive (FAT32 format). Even if network communication fails, local data remains intact – ideal for unattended long‑term monitoring.

3. Dual Communication Interfaces + Standard Protocols – Easy Integration

The RocPQD features both RJ45 Ethernet and RS485 ports, supporting Modbus‑TCP and Modbus‑RTU protocols. It can directly connect to PLCs, SCADA systems, energy management platforms, or cloud gateways – no additional protocol converters needed. For sites with existing distribution automation systems, data integration is plug‑and‑play.

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

• Active energy Class 0.5S, voltage ±0.2%, current 0.2%+sensor accuracy
  Meets IEC 62053‑22 billing‑grade accuracy – can be used for energy cost settlement. High precision ensures credible before/after comparisons for energy‑saving retrofits.
• Rogowski coil measurement 100A to 12,000A
  One analyzer covers all current levels from low‑voltage branches to medium‑voltage incomers. No hardware changes required – significantly reduces spare parts and selection complexity.
• 32GB built‑in memory card, programmable data logging (5s – 9999s interval)
  Can record months or even years of trend data, supporting 30+ parameters including voltage, current, power, harmonics, unbalance, demand, etc. Data remains safe even if communication is interrupted.
• Waveform recording (1kHz – 8kHz sampling rate, 5 – 40 seconds duration)
  Captures transient disturbances (motor starts, capacitor switching, lightning transients) – helps analyze root causes of faults. CSV format allows direct import into Excel or dedicated analysis software.
• Event recording: sags/swells/interruptions, frequency excursions, harmonic exceedances, unbalance, etc.
  Automatically timestamps abnormal events with duration and magnitude – generates event reports. Configurable thresholds and hysteresis reduce false alarms.
• Dual communication: Modbus‑TCP (RJ45) + Modbus‑RTU (RS485)
  Simultaneously supports local serial communication and Ethernet networking. Suitable for new projects (Ethernet) and legacy upgrades (RS485) – compatible with mainstream monitoring systems.
• 3.5‑inch IPS display, 480×800 resolution
  On‑site viewing of voltage, current, harmonic bar charts, phasor diagrams, waveforms, etc. – no computer needed. Clear and intuitive for commissioning.
• Multiple power supply options: 95–265VAC / 5‑36VDC / 90‑528VAC
  Adapts to industrial AC, low‑voltage DC (battery cabinets), and ultra‑wide AC (mines/outdoor). Operates reliably from -20℃ to +55℃.
• IP30 protection, CAT III 600V
  Suitable for panel installation, meets industrial safety standards. CE certified, compliant with international export requirements.
• Rich power quality parameters
  • Harmonics: 1st–50th voltage/current harmonics (THD, TOHD, TEHD), percentage and magnitude
  • Unbalance: Negative‑sequence and zero‑sequence unbalance for voltage and current
  • Demand: Sliding or fixed active/reactive/apparent demand with peak recording
  • K‑factor, crest factor, phase angle, CO₂ emissions, and more

Typical Applications

1. Power Quality Monitoring on Industrial Production Lines

In factories with dense VFDs, welders, and large motors, the RocPQD can run online for extended periods. Using 32GB storage to record harmonic trends and transient events, maintenance staff can identify which equipment causes voltage dips or harmonic exceedances, preventing unplanned downtime.

2. Data Center PUE Optimization and Power Quality Auditing

Data center UPS inputs and precision PDUs require high‑accuracy power quality monitoring. The RocPQD’s Class 0.5S active energy accuracy meets PUE calculation requirements, while waveform capture records voltage transients during UPS switching or load steps, supporting Tier certification documentation.

3. Grid Connection Points for Renewables (PV, Storage, EV Chargers)

PV inverters, energy storage converters, and EV chargers can introduce DC injection, harmonics, and power factor variations. The RocPQD records 1st–50th harmonics and power factor at the point of common coupling, helping verify compliance with grid codes (e.g., IEEE 519, GB/T 14549). Event logs provide voltage excursion timestamps for utility dispute resolution.

4. Power Quality and Sub‑Metering in Commercial Buildings

In high‑rise buildings, VFD elevators, central HVAC, and LED dimming systems may cause neutral overheating or capacitor bank failures. The RocPQD can be installed in floor distribution rooms to record harmonics and unbalance, enabling early warning for property management. The 6‑tariff multi‑rate energy function supports time‑of‑use billing for tenant cost allocation.

5. Long‑Term Health Monitoring of Critical Distribution Circuits

For critical power supplies (hospitals, airports, semiconductor fabs), the RocPQD can continuously record voltage deviation, frequency fluctuation, and harmonic distortion over months. The data logger at 1‑minute intervals creates long‑term trend profiles, helping predict equipment aging or line overload risks.

Quality and Certifications

The RocPQD is designed and manufactured to meet international standards, with CE certification and compliance with IEC 62052‑11, IEC 62053‑21/22, EN 61010‑1, and others. Its EMC performance reaches IEC 61000‑4 highest level (Level IV), ensuring stable operation in harsh electromagnetic environments. Operating temperature -20℃ to +55℃, storage -40℃ to +70℃ – suitable for demanding outdoor distribution applications.

About the Company

Our 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 power quality analyzer should deliver accuracy, data security, and deployment convenience at the same time. The RocPQD embodies this philosophy – it turns professional power quality analysis from an expensive, portable exercise into a permanently installed “guardian” of your distribution system.

Start Your In‑Depth Power Quality Journey Today

Whether you need a one‑time site diagnosis or a permanent online monitoring network, the RocPQD helps you reduce testing costs, obtain reliable data, and improve power supply reliability with its non‑invasive installation, 32GB local storage, and dual‑protocol communication.

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

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.

In power distribution retrofits and new projects, engineers often face a dilemma: achieving high-precision energy and power quality monitoring for three-phase circuits while being constrained by limited panel cutout space and complex wiring conditions. Traditional three-phase meters tend to be bulky, have fixed connections, 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 Roc337 is a standard 96×96mm panel-mount three-phase multi-function energy meter, designed for industrial power distribution, energy monitoring, and power analysis. It features snap‑on tool‑free installation, supports direct connection to Rogowski coils, voltage‑output CTs, and 5A CT inputs, offers multiple power supply options, and integrates advanced functions such as harmonic analysis, demand calculation, and multi‑tariff energy. One meter meets the majority of low‑voltage and medium‑voltage metering applications.

Three Core Advantages: Simplify Complexity

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

The Roc337 is available in two sub‑series: Type N (Rogowski coil and voltage-output CT) and Type C (5A/7A conventional CT input). This means:

• Retrofit projects: No power shutdown or rewiring required – 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 12,000A.
• 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 50mV/kA, 85mV/kA, 100mV/kA; measurable current up to 12,000A (50Hz).
• Voltage-output CT input: 0–7A AC.
• Voltage input: Direct connection 0–600VAC (phase voltage), max 720VAC.

2. Standard Panel Cutout + Snap-On Mounting – Fixed in 90 Seconds

The Roc337 uses the industry‑standard 96×96mm panel cutout, fully compatible with existing cabinets, instrument panels, and test benches. The rear features a snap‑on (tool‑free) design – no screws required; just push the meter into the cutout and it locks securely. For panel builders and field engineers, this dramatically reduces assembly time.

• Dimensions: 96×96×45mm (excluding terminal depth)
• Cutout size: 92×92mm, snap‑on fixing
• Weight: only 259g – lightweight yet robust

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

The Roc337 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.
• Phase sequence detection: Automatically identifies incorrect voltage or current phase sequence – instant field feedback.
• 2 digital inputs + 1 relay output + 1 energy pulse output: Easy integration with alarms, pulse counters or remote control.

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 up to 12,000A; direct CT input up to 7A
  Covers everything from low‑voltage branch circuits to medium‑/high‑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℃, humidity 95% RH
  Reliable in high‑temperature summer switchgear or cold winter outdoor enclosures; resistant to condensation – long‑term maintenance‑free operation.
• EMC highest level: IEC 61000-4-2/4/5 Level IV
  No data corruption or communication interruption in harsh interference environments such as VFD rooms, welding shops or HV switchyards – ensures data integrity.
• 96×96mm standard panel cutout, snap‑on mounting, no screws
  Compatible with all standard meter holes – retrofit without modifying cabinet doors. One person, 90 seconds to secure – 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) + phase sequence self‑check
  Supports TOU billing and peak demand charge calculation. Automatic phase sequence warning reduces on‑site commissioning time by more than 50%.
• 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 Roc337 mounts directly on cabinet doors or instrument panels. Non‑invasive Rogowski coils (no external integrator needed) 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 Roc337 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 Roc337 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 96×96mm panel size of the Roc337 fits easily. Combined with 6‑tariff capability, it accurately logs tenant consumption by time‑of‑use, supporting compliant utility billing.

Quality and Certifications

The Roc337 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

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 Roc337 embodies this philosophy – it turns a panel‑mount 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 panel or retrofitting an old cabinet, the Roc337 helps you reduce costs, shorten lead times and obtain trustworthy energy data with its standard size, versatile sensor compatibility, and fast installation.

Contact our sales team for the Roc337 datasheet, pricing and technical support. We look forward to working with you to build smarter, more efficient energy monitoring networks.

In today‘s industrial and commercial power distribution systems, the demand for circuit‑level energy monitoring is growing rapidly – yet panel space is becoming increasingly scarce. Traditional metering solutions typically require one meter per circuit, consuming excessive DIN rail space, demanding power shutdowns, complex rewiring, and high installation costs. For retrofit projects, dense distribution panels, or drawer‑type switchgear, these challenges are even more critical.

The Roc132 is a high‑performance energy meter designed specifically for multi‑circuit monitoring. With an ultra‑compact 1P (18mm) width, non‑invasive Rogowski coil or split‑core CT installation, and the ability to cascade multiple units sharing a single voltage reference, the Roc132 allows you to accurately measure dozens of circuits without modifying existing layouts or interrupting power.

Three Core Advantages – Told by Numbers

1. 1P Width – Save 60–80% of DIN Rail Space

Each Roc132 module occupies only 18mm (1P) of DIN rail space, while conventional three‑phase meters typically require 4P to 8P. For a project monitoring 10 circuits, the Roc132 saves over 180mm of rail length – turning an impossible retrofit into a simple installation. For space‑critical applications like drawer‑type switchgear or prefabricated substations, this is often the only feasible solution.

2. Non‑Invasive Installation – Reduce Labor Cost by >60%

The Roc132 works with flexible Rogowski coils (100A to 6000A) or split‑core CTs (≤100A). These sensors can be clamped directly onto cables, copper bars, or busbars – no circuit disconnection, no busbar removal, no power shutdown. Retrofits can be completed while production lines keep running, eliminating downtime, reducing electric shock risks, and cutting installation time to one‑third of conventional methods.

3. Cascading Design – One Voltage Connection for Dozens of Circuits

When multiple Roc132 meters are mounted side by side, a simple MC cascading component transmits the voltage reference (L1/L2/L3/N) and the RS485 bus from one meter to the next. This means: no matter how many circuits you monitor, you only need to connect voltage wires once. No more parallel wiring for each meter, no more dozens of terminal blocks – wiring errors approach zero.

Key Specifications – What the Numbers Mean for You

Parameter	Value	What It Delivers
Module width	1P (18mm)	10 circuits take only 180mm – saves >50% rail space vs. conventional meters
Current range	100A / 300A / 600A / 1000A / 3000A / 6000A	One solution covers everything from branch circuits to main feeders
Sensor type	Rogowski coil or split‑core CT	No power down, no rewiring – zero‑downtime retrofits
Active energy accuracy	Class 0.5S (IEC 61557‑12)	Billing‑grade accuracy for cost allocation and energy verification
Harmonic analysis	1st to 51st order (percentage & magnitude)	Diagnose power quality issues from VFDs, LEDs, UPS, and other non‑linear loads
Operating temperature	-25°C to +70°C	Reliable in outdoor cabinets and high‑temperature workshop environments
Communication	RS485 Modbus‑RTU	Plug‑and‑play integration with PLCs, SCADA, gateways, and energy management systems

Typical Applications

Drawer‑Type Low‑Voltage Switchgear

Space inside drawer compartments is extremely limited, making traditional meters impossible to install. The Roc132’s 1P width fits easily on the rear panel or side plate, while flexible Rogowski coils clamp directly onto the primary busbars – no disassembly required. Multiple drawers share a single voltage reference via the cascading component, and all data is collected centrally over RS485. This is currently the most space‑efficient drawer monitoring solution available.

Production Line Machine Monitoring

An automated production line typically includes rotary tables, lifts, conveyors, robots, and other workstations. Install one Roc132 per machine, cascade them along the DIN rail, and connect voltage only once. Real‑time current, power, and energy data flow into the PLC or MES via Modbus, helping production managers identify inefficient equipment, optimize cycle times, and calculate product‑level energy costs.

Commercial Building Sub‑Metering

In floor‑level distribution rooms, circuits for lighting, HVAC, elevators, general outlets, and fan coils need separate measurement. The Roc132’s small footprint allows retrofitting inside existing panels without any enclosure modification. The 51st‑order harmonic measurement also helps diagnose neutral overheating or transformer issues caused by non‑linear loads such as VFDs and LED drivers.

Data Center PDU Monitoring

Data centers demand continuous operation and maximum space utilization. The Roc132, paired with flexible Rogowski coils, can be added to PDU input or output busbars without any power interruption. Class 0.5S accuracy provides trustworthy data for PUE calculation, the cascading design reduces internal wiring clutter, and RS485 output integrates seamlessly with DCIM software.

Quality and Reliability

The Roc132 is designed and manufactured to meet IEC 61557‑12 (performance class PMD‑II/DD/K70/1) and carries CE certification. Key reliability features include:

• Measurement category CAT IV – suitable for distribution side applications
• Pollution degree 3 – designed for industrial dust environments
• Wide operating temperature (-25°C to +70°C) – no concerns about high temperatures inside electrical panels
• Factory full‑range calibration – guaranteed 0.5S accuracy over the entire current range

About the Company

We are a technology company with years of dedicated experience in energy metering and industrial IoT solutions. Our in‑house capabilities cover everything from core metering chips to communication protocol stacks. Our product portfolio includes Rogowski coils, split‑core CTs, single‑circuit and multi‑circuit energy meters, gateways, and cloud platforms, serving industries such as manufacturing, infrastructure, commercial real estate, and renewable energy. We understand that every project is unique, and we are committed to providing flexible product customization and professional technical support.

Start Your Multi‑Circuit Monitoring Upgrade Today

Facing tighter electrical spaces and growing demands for circuit‑level visibility, the Roc132 offers a simple, efficient, and scalable solution. No power shutdowns, no major modifications, no high upfront investment – just reliable, accurate energy data for every critical circuit, enabling energy optimization, cost control, and predictive maintenance.

Contact us today to learn how the Roc132 can meet your project requirements. Whether you are planning a new installation or retrofitting an existing system, our team is ready to provide professional advice and tailored recommendations.