In modern industrial automation, power quality monitoring, and renewable energy systems, accurate current measurement is the foundation of efficiency, protection, and data‑driven decision‑making. Traditional current transformers (CTs) often struggle with magnetic saturation, limited bandwidth, bulky size, and difficult installation – especially in retrofit projects or high‑current scenarios.

Rogowski coils overcome these limitations. Their air‑core design eliminates saturation, provides a wide frequency response (from a few Hz to MHz), and offers a flexible, lightweight structure that can be installed around existing cables without interrupting power. This makes them the preferred choice for engineers and system integrators worldwide.

We offer three Rogowski coil series – WRC, RV, and RN-XL – each engineered for a specific class of applications. Below is a detailed look at what makes each series unique and how to choose the right one for your project.

WRC Series: High‑Accuracy Online Monitoring with Direct System Integration

The WRC series is built for permanent, continuous, high‑precision current monitoring in industrial and commercial facilities.

WRC-100

Key technical features:

• Accuracy: ±0.5% (system‑level, including integrator)
• Current range: 0.5A – 200kA (wide dynamic range, from low load currents to fault currents)
• Frequency response: 5Hz – 5kHz (covers fundamental, harmonics up to the 100th, and typical switching frequencies)
• Output options: 4‑20mA (loop‑powered) or RS‑485 (Modbus‑RTU) – no external integrator needed
• Installation: Flexible, wrap‑around design; length can be customized for large busbars or small cables
• Operating temperature: -20°C to +70°C
• Certifications: CE, RoHS

What makes WRC stand out:
It is a plug‑and‑play solution for energy management systems (EMS), SCADA, PLCs, and building automation. The integrated electronics directly output a standardized signal, saving engineering time and reducing component count. This makes the WRC ideal for:

• Motor condition monitoring and predictive maintenance
• Machine‑level energy tracking in manufacturing plants
• Compressor, pump, and fan efficiency analysis
• Sub‑metering in data centers and commercial buildings

If you need reliable, long‑term current data without designing a separate signal conditioning circuit, the WRC is your best choice.

RV Series: All‑Purpose High‑Current Measurement – The Workhorse

The RV series is our most versatile Rogowski coil, designed to handle a vast majority of industrial and power distribution applications. It strikes an excellent balance between performance, robustness, and cost‑effectiveness.

Key technical features:

• Accuracy: ±1% (reading)
• Current range: 10A – 300kA (from load current to severe fault current)
• Frequency response: 10Hz – 1MHz (captures up to the 400th harmonic, ideal for power quality analysis)
• Output: Standard AC voltage (e.g., 80mV@1000A at 50Hz) – requires an external integrator or connection to instruments with built‑in integration
• Optional features: Electrostatic shielding for superior external magnetic field rejection
• Coil flexibility: Standard lengths (300mm, 500mm, 700mm, 1000mm); custom lengths available on request
• Operating temperature: -20°C to +70°C
• Certifications: CE, RoHS

Why RV is the go‑to choice for system integrators:

• No power interruption needed – wrap the coil around existing cables or busbars without shutting down the panel.
• Excellent anti‑interference – the optional shielding ensures accurate measurements even in crowded switchgear with strong magnetic fields from adjacent phases.
• Wide application range:
  • Retrofit energy monitoring in distribution cabinets
  • Power quality analyzers (harmonics, flicker, transients)
  • Switchgear protection and fault recording
  • High‑current testing (e.g., welding equipment, electrolytic cells)
  • Renewable energy: wind turbine output monitoring, PV inverter testing

The RV series is the workhorse you can stock for most customer needs – from a simple ammeter retrofit to a sophisticated power quality study.

RN-XL Series: Ultra‑Flexible High‑Frequency Specialist for R&D and Power Electronics

The RN-XL is a specialized tool for engineers working with high‑speed switching power supplies, wide‑bandgap semiconductors, and RF current measurements. Its extremely thin profile and ultra‑wide bandwidth set it apart.

Key technical features:

• Accuracy: ±2% (typical – optimized for waveform shape and timing, not absolute low‑current accuracy)
• Current range: 10A – 300kA
• Frequency response: 10Hz – 20MHz (captures nanosecond transients)
• Coil cross‑section: Only φ1.6mm – can fit through TO‑220, TO‑247, and even smaller device leads
• Output: Custom integrator options (e.g., ±5V, ±10V) – can be tailored to your oscilloscope or data acquisition system
• Low insertion impedance: Negligible impact on the circuit under test
• Operating temperature: -20°C to +70°C
• Certifications: CE, RoHS

Where RN-XL excels (unique applications):

• Double‑pulse testing of SiC and GaN MOSFETs – measure fast switching currents with minimal loop inductance.
• High‑frequency power supply design (resonant converters, class‑E amplifiers) – verify current waveforms at MHz switching frequencies.
• EMI debugging – identify common‑mode or differential‑mode current paths with a flexible, low‑invasive probe.
• Semiconductor device characterization – capture di/dt during turn‑on/turn‑off events.
• Inverter motor drive development – analyze high‑frequency bearing currents or leakage paths.

If your work involves third‑generation semiconductors, MHz switching, or lab‑grade current waveform analysis, the RN-XL is the only coil in our lineup that can keep up. Its ultra‑thin profile also makes it invaluable for retrofitting inside densely packed equipment where even a 5mm coil cannot pass.

How to Choose the Right Series – A Quick Summary

If your priority is…	Choose
Direct connection to PLC/EMS without extra signal conditioning	WRC (4‑20mA or RS‑485)
Retrofitting existing panels, measuring up to 300kA, good accuracy at low cost	RV (standard AC output)
Measuring high‑frequency switching currents (MHz range) or fitting into tiny gaps	RN-XL (φ1.6mm, 20MHz bandwidth)
Long‑term permanent installation with data logging	WRC
Power quality / harmonic analysis up to the 400th order	RV (with shielding)
R&D lab, SiC/GaN double‑pulse test, EMI troubleshooting	RN-XL

All three series share key advantages:

• No magnetic saturation – accurate even during fault currents.
• Flexible, non‑invasive installation – wrap around existing cables without powering down.
• Lightweight and compact – fits in crowded electrical cabinets.
• Customizable – coil length, lead length, output scaling, and special connectors available for OEM orders.

About Us

We are an experienced manufacturer specializing in smart energy meters and Rogowski coils for industrial IoT, power monitoring, and renewable energy applications. Our products are exported to markets worldwide and trusted by system integrators, facility managers, and R&D engineers.

What sets us apart:

• In‑house R&D – we design both the coils and the integrating electronics, ensuring perfect matching.
• Strict quality control – each coil is calibrated and temperature‑compensated before shipment.
• Localized support – technical guidance from pre‑sales to post‑installation.
• OEM/ODM capabilities – custom lengths, output types, connectors, and even fully integrated meters with our coils.

Whether you need a single sample for a lab test or a thousand units for a large‑scale energy monitoring project, we are ready to support you.

Optimize Your Current Measurement Solution Today

Choosing the right Rogowski coil means more accurate data, more reliable systems, and lower total cost of ownership. Contact us to request samples, technical datasheets, or a one‑on‑one consultation. Our engineering team will help you match the correct WRC, RV, or RN-XL to your specific application – from a factory floor to a semiconductor lab.

Let’s measure smarter.

In today’s fast-evolving industrial and commercial landscape, energy efficiency is no longer just a cost-saving measure — it is a strategic imperative. From manufacturing plants and data centers to commercial buildings and renewable energy installations, the ability to monitor, analyze, and act upon real-time energy data has become essential for staying competitive. Yet many organizations still struggle with fragmented monitoring systems, limited data visibility, and complex integration challenges.

Enter the Roc-PQP Smart IoT Power Quality Analyzer — a compact, panel‑mount three‑phase power quality analyzer that combines high‑accuracy measurement, massive onboard storage, and versatile connectivity in a single space‑saving package.

Built for Demanding Environments

The Roc-PQP is purpose‑built for modern energy monitoring and power quality analysis. It supports multiple wiring configurations, including 3P4W, 3P3W, 1P3W, and 1P2W, making it suitable for diverse global installations. With external Rogowski coils or voltage‑output current transformers, the Roc-PQP enables non‑invasive testing, dramatically simplifying setup and reducing construction costs — whether you are monitoring secondary sides in medium‑ or high‑voltage substations or directly wiring into low‑voltage distribution panels.

Three Core Advantages That Set It Apart

1. Powerful Data Recording with Local Storage

One of the most distinguishing features of the Roc-PQP is its built‑in 32GB storage capacity. While many meters rely entirely on continuous cloud connectivity to retain historical data, the Roc-PQP empowers users with onboard logging capabilities. It supports programmable interval recording (data logger) and waveform capture, allowing engineers to analyze load profiles, detect power quality issues, and troubleshoot anomalies without the risk of data gaps. This is especially valuable in environments where network connectivity may be intermittent or where long‑term historical analysis is required.

2. Exceptional Flexibility and Expandability

The Roc-PQP fully supports Rogowski coils and voltage‑output current transformers, enabling non‑invasive, clamp‑on testing. This not only simplifies installation but also ensures operational continuity. The meter also accepts voltage inputs via external voltage transformers, adapting seamlessly from low‑voltage to high‑voltage measurement scenarios.

3. Comprehensive Communication Integration

On the communication front, the Roc-PQP is future‑ready. It includes both RJ45 Ethernet and RS485 ports as standard, supporting Modbus‑TCP and Modbus‑RTU protocols. This dual‑communication capability ensures seamless integration with SCADA systems, building management platforms, PLCs, and cloud‑based energy management software, making it a versatile component for new installations or retrofit projects.

Performance at a Glance

Model & Type – Roc-PQP , three‑phase power quality analyzer.
Applications – Power analysis, power measurement, power quality analysis.
Wiring Modes – 3P4W, 3P3W, 1P3W, 1P2W.
Current Sensors – Rogowski coil or voltage‑output CT.
Voltage Access – Direct (up to 600V CAT III) or via voltage transformer.
Storage – 32GB TF card; data export via USB flash drive (FAT32 format).
Communication – RJ45 Ethernet and RS485, supporting Modbus‑TCP and Modbus‑RTU.
Power Supply Options – Three variants: Roc-PQP‑2 (95‑265VAC / 110‑370VDC), Roc-PQP‑3 (5‑36VDC), RocPQP‑8 (90‑528VAC). Maximum power consumption: 5VA.
Display – 3.5″ IPS, 480×800 resolution.
Physical – 96×96×94mm, approx. 850g.
Environmental – Operating: -20℃ to +55℃, humidity ≤90% RH; Storage: -40℃ to +70℃, humidity ≤95% RH (non‑condensing).
Safety & Protection – Measurement category CAT III 600V, front panel IP30. Certifications: CE, RoHS, ISO.

Measurement Accuracy

• Voltage – 0.2%
• Current – 0.2% + sensor accuracy
• Frequency – ±0.001Hz
• Power factor – ±0.005
• Active power / energy – 0.5%
• Reactive power / energy – 1%
• Apparent power / energy – 0.5%

Where the Roc-PQP Excels

The versatility of the Roc-PQP makes it suitable for a broad spectrum of applications:

• Commercial Buildings – Perfect for tenant sub‑metering, HVAC monitoring, and whole‑building energy optimization.
• Industrial Facilities – Provides machine‑level energy tracking, load profiling, and power quality analysis to support efficiency initiatives.
• Data Centers – Delivers high‑accuracy metering with waveform capture to help optimize Power Usage Effectiveness (PUE).
• Renewable Energy Systems – Ideal for monitoring inverter output, grid interface points, and compliance reporting.
• Medium‑ and High‑Voltage Substations – Serves as a reliable secondary‑side metering solution with remote communication capabilities.
• Power Quality Audits – Offers unmatched convenience for non‑invasive power quality analysis and field testing.

Quality You Can Rely On

Every Roc-PQP meter is manufactured under strict quality controls and carries CE certification, ensuring compliance with international standards for safety and performance. The compact 92×92mm panel‑mount design simplifies installation in crowded electrical panels, reducing both labor time and space requirements.

About the Company

Behind the Roc-PQP is  a company with years of dedicated experience in the development and manufacturing of Rogowski coils, integrators, smart meters, and power quality analyzers. We specialize in delivering reliable, intelligent, and cost‑effective monitoring equipment that empowers businesses to take control of their energy usage. Our products serve a wide range of industries — from manufacturing and infrastructure to commercial real estate and renewable energy — across global markets.

What sets us apart is our commitment to in‑house research and development, rigorous quality testing, and localized customer support. We believe that a meter is only as good as the results it delivers, and we work closely with system integrators, facility managers, and utility operators to ensure every installation meets the highest standards of performance and reliability.

Ready to Take Your Energy Monitoring to the Next Level?

In a world where energy data drives decisions, you need a metering solution that delivers accuracy, flexibility, and reliability. The Roc-PQP Smart IoT Power Quality Analyzer combines powerful local storage, comprehensive connectivity, and exceptional expandability in a compact, easy‑to‑install package — giving you the insights you need to optimize operations, reduce costs, and meet sustainability goals.

Contact us today to learn more about how the Roc-PQP can transform your energy monitoring infrastructure. Whether you are planning a new installation or upgrading an existing system, our team is ready to help you find the right solution for your unique requirements.

Discover the Roc131+GW30 multi-circuit measurement solution. Modular design, plug-and-measure installation, and Modbus-RTU upload for production lines and building sub-metering.

Figure 1:Roc131+GW30 Plug-and-Measure Installation Demo

In today’s industrial and commercial power distribution environments, electrical cabinet space continues to shrink while the number of circuits requiring monitoring grows. To address this challenge, the Roc131+GW30 multi-circuit measurement solution offers a compact, flexible, and easy-to-deploy alternative to traditional metering methods.

Traditional multi-circuit measurement approaches often require one meter per circuit, consuming significant DIN rail space. They also involve complex wiring and high installation costs, making them unsuitable for compact distribution panels, precision production lines, and distributed energy monitoring applications.

The Roc131+GW30 multi-circuit measurement solution combines high-precision energy acquisition with flexible data aggregation. It enables users to monitor multiple critical circuits—even in space-constrained electrical enclosures.

Solution Architecture: Designed for Synergy and Efficiency

This solution consists of two core components: the Roc131 Multi-Circuit Measurement Module and the GW30 Data Acquisition Gateway.

GW30: As a front-end data acquisition device, the GW30 collects raw current  from each circuit and transmits the acquired data to the Roc131 for further processing. The GW30 focuses on accurate signal acquisition and reliable data transmission.

Roc131: A multi-circuit measurement module that receives data from the GW30, performs energy calculations and data processing, and uploads the results via Modbus-RTU to SCADA, PLCs, or cloud platforms.

Three Core Advantages

1. Compact Footprint, Multiple Circuits

Traditional metering solutions typically require one meter per circuit, consuming significant DIN rail space. The Roc131 features a modular, expandable design. Each module is a 1P unit that monitors a single circuit. Depending on the number of circuits to be measured, users can freely select and combine the required number of modules. This flexible architecture minimizes space occupation inside electrical panels while adapting to various application needs. Whether it’s rotary table motors, main line power, lighting, or auxiliary circuits, all can be monitored by combining the appropriate number of Roc131 modules.

*Figure 2: Roc131 modules—the building blocks of this multi-circuit measurement solution.*

2. Tool-Free Installation, Simplified Deployment

The Roc131 works with split-core current transformers or flexible Rogowski coils, which can be directly clamped onto existing cables without disconnecting circuits or removing busbars. This is especially advantageous for retrofit projects on live electrical systems, significantly reducing downtime, lowering installation risks, and minimizing labor costs.

*Figure3: Plug-and-measure installation—no wiring, no downtime.*

3. Centralized Data, Flexible Communication

The GW30 acts as a front-end data acquisition device, collecting raw current from each circuit and transmitting the data to the Roc131 for processing. The Roc131, equipped with built-in Ethernet and RS485 ports, handles energy calculations and data processing, and uploads the results via Modbus-RTU to SCADA, PLCs, or cloud platforms. For extended connectivity, optional 4G or Wi-Fi modules can be added to enable remote cloud-based management.

Typical Applications

Production Line Power Monitoring

On automated production lines, energy data from different workstations (such as rotary tables, lifts, and main drives) is critical for optimizing cycle times and calculating operational costs. The GW30 collects current signals from key circuits such as W28/W29/W30 Rotary Table Drives, W30 Main Line Drive, and Unloading Lift Drive, while the Roc131, installed compactly inside control cabinets, captures voltage signals from these circuits, processes the combined data, and uploads the results via Modbus-RTU to MES or energy management systems for line-level energy visualization.

*Figure 4: Production line monitoring using the Roc131+GW30 multi-circuit measurement solution.*

Distribution Panel Retrofits

 For existing distribution panels where additional circuit-level metering is required, traditional approaches often face space constraints and wiring difficulties. The Roc131+GW30 solution, featuring compact form factors and clamp-on current sensors, can be easily added to existing panels without altering the original layout, enabling new multi-circuit monitoring capabilities.

Commercial Building Sub-Metering

In commercial complexes, different loads such as lighting, HVAC, elevators, and general outlets require separate measurement. Roc131 modules can be flexibly deployed in floor-level distribution rooms, with the Roc131 processing the data and uploading it to building automation systems, supporting granular energy management.

*Figure 5: Floor-level deployment for building sub-metering applications.*

Quality and Reliability

Both the Roc131 and GW30 are designed to meet industrial-grade standards and carry CE certification, ensuring reliable operation in complex electromagnetic environments. They feature wide operating temperature ranges, making them suitable for applications ranging from factory floors to outdoor electrical enclosures.

About the Company

We are a technology company with years of dedicated experience in energy metering and industrial IoT solutions. Our capabilities span in-house R&D, manufacturing, and localized customer support. From core metering chips to communication protocol stacks, every aspect is optimized by our internal teams to ensure product reliability, stability, and continuous improvement.

Our products serve a wide range of industries, including manufacturing, infrastructure, commercial real estate, and renewable energy, and are part of the global supply chain for several internationally recognized companies. We understand that every project is unique, and we are committed to providing flexible product customization and technical support tailored to our customers’ specific needs.

Start Your Journey to Precise Multi-Circuit Measurement

Facing increasingly compact electrical spaces and growing demands for circuit-level monitoring, the Roc131+GW30 offers a simple, efficient, and scalable solution. Without major modifications, you can gain detailed energy visibility into every critical circuit, providing reliable data for energy optimization, cost control, and equipment maintenance.

Contact us today to learn more about how the Roc131+GW30 solution can meet your project requirements. Whether you are planning a new installation or upgrading an existing system, our team is ready to provide professional support and tailored recommendations.

Roc431-S Smart IoT Meter: Precision Energy Monitoring with Unmatched Connectivity and Storage

In today’s rapidly evolving industrial and commercial landscape, energy efficiency is no longer just a cost-saving measure — it is a strategic imperative. From manufacturing plants and data centers to commercial buildings and renewable energy installations, the ability to monitor, analyze, and act upon real-time energy data has become essential for staying competitive. Yet many organizations still struggle with fragmented monitoring systems, limited data visibility, and complex integration challenges.

Enter the Roc431-S Smart IoT Meter — a compact, rail-mounted three-phase energy meter engineered to deliver precise measurements, robust connectivity, and enterprise-grade data management in a single, space-saving package.

 

Designed for Demanding Environments

The Roc431-S is purpose-built for modern energy monitoring applications. It supports a wide range of voltage configurations, including three-phase 230/400 V, single-phase 120/240 V, 277/480 V, and 230 V systems, making it suitable for diverse global installations. Whether you are monitoring secondary sides in medium- or high-voltage substations or directly wiring into low-voltage distribution panels, the Roc431-S adapts seamlessly with support for 3P4W, 3P3W, 1P3W, and 1P2W wiring systems.

Three Core Advantages That Set It Apart

1. Powerful Data Recording with Local Storage

One of the most distinguishing features of the Roc431-S is its built-in 32GB storage capacity. While many meters rely entirely on continuous cloud connectivity to retain historical data, the Roc431-S empowers users with onboard logging capabilities. It supports programmable interval recording and waveform capture, allowing engineers to analyze load profiles, detect power quality issues, and troubleshoot anomalies without the risk of data gaps. This is especially valuable in environments where network connectivity may be intermittent or where long-term historical analysis is required.

2. Extensive Connectivity and Expandability

The Roc431-S comes equipped with 4 digital inputs and 4 digital outputs as standard, enabling direct connection to alarms, pulse counters, and control devices. But its flexibility does not stop there. An expansion slot allows for customizable add-on modules — including zero-sequence current monitoring, temperature sensing, or additional input channels — ensuring the meter can grow with your application needs.

On the communication front, the meter is future-ready. It includes both RJ45 Ethernet and RS485 ports as standard, supporting Modbus-TCP and Modbus-RTU protocols. This dual-communication capability ensures seamless integration with SCADA systems, building management platforms, PLCs, and cloud-based energy management software, making it a versatile component for new installations or retrofit projects.

3. Flexible Power Supply Options

Installation environments vary widely, and the Roc431-S is designed to accommodate them. The meter is available in two power supply variants: 95–265 VAC for standard AC installations, and 5–36 VDC for low-voltage DC environments. For applications requiring even greater flexibility, an external expansion module can support 90–528 VAC for the main circuit, along with an auxiliary AC power supply — a feature particularly useful in industrial settings where voltage conditions may fluctuate.

Where the Roc431-S Excels

The versatility of the Roc431-S makes it suitable for a broad spectrum of applications:

Commercial Buildings: Perfect for tenant sub-metering, HVAC monitoring, and whole-building energy optimization.

Industrial Facilities: Provides machine-level energy tracking, load profiling, and power quality analysis to support efficiency initiatives.

Data Centers: Delivers high-accuracy metering with waveform capture to help optimize Power Usage Effectiveness (PUE).

Renewable Energy Systems: Ideal for monitoring inverter output, grid interface points, and compliance reporting.

Medium- and High-Voltage Substations: Serves as a reliable secondary-side metering solution with remote communication capabilities.

Quality You Can Rely On

Every Roc431-S meter is manufactured under strict quality controls and carries CE certification, ensuring compliance with international standards for safety and performance. The compact rail-mount design simplifies installation in crowded electrical panels, reducing both labor time and space requirements.

About the Company

Behind the Roc431-S is a company with years of dedicated experience in the field of energy metering and industrial IoT solutions. We specialize in developing reliable, intelligent, and cost-effective monitoring equipment that empowers businesses to take control of their energy usage. Our products serve a wide range of industries — from manufacturing and infrastructure to commercial real estate and renewable energy — across global markets.

What sets us apart is our commitment to in-house research and development, rigorous quality testing, and localized customer support. We believe that a meter is only as good as the results it delivers, and we work closely with system integrators, facility managers, and utility operators to ensure every installation meets the highest standards of performance and reliability.

Ready to Take Your Energy Monitoring to the Next Level?

In a world where energy data drives decisions, you need a metering solution that delivers accuracy, flexibility, and reliability. The Roc431-S Smart IoT Meter combines powerful local storage, extensive connectivity, and scalable expandability in a compact, easy-to-install package — giving you the insights you need to optimize operations, reduce costs, and meet sustainability goals.

Contact us today to learn more about how the Roc431-S can transform your energy monitoring infrastructure. Whether you are planning a new installation or upgrading an existing system, our team is ready to help you find the right solution for your unique requirements.