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.