An AC energy meter is a specialized device engineered to collect AC power data for a single load or an entire system. Installed near panelboards or switchgear, it continuously provides insight into consumption patterns, load profile trends, and overall system performance.
Power Meters
BRN-D603
The BRN-D603 series power quality online monitoring device is a high-precision, multifunctional power quality monitoring solution, available in two form factors: the single-circuit portable model (BRN-D603) and the multi-circuit rack-mount model (BRN-D603S). It comprehensively covers voltage and current sampling, harmonic analysis, flicker monitoring, unbalance analysis, fault recording, and event logging. Compliant with IEC 61000-4-30 Class A standards, the series is ideally suited for precision power quality monitoring and energy efficiency management in medium- and low-voltage distribution networks, industrial parks, commercial buildings, data centers, substations, and renewable energy sites.
Built on a high-performance hardware platform and embedded operating system, the BRN-D603 series delivers 0.1%-class voltage and current measurement accuracy, harmonic analysis up to the 63rd order, and COMTRADE-format waveform recording capabilities. The device supports multi-protocol communication including Modbus, IEC 61850, and IEC-103, enabling seamless integration with SCADA, BMS, and EMS systems. The multi-circuit model can monitor up to 12 three-phase circuits simultaneously, with support for customizable limit alarms, event-triggered recording, and remote operation and maintenance. Designed specifically to meet the demands of grid upgrades, harmonic mitigation, comprehensive power quality management, and refined energy management in the context of carbon reduction initiatives, this series is the ideal choice for enhancing power supply reliability and optimizing energy efficiency.
- Measurement Accuracy: Voltage/current RMS accuracy Class 0.1, power accuracy Class 0.5, harmonic voltage accuracy 1.0 (when >1% of nominal) or 0.05% of nominal (when <1% of nominal), frequency accuracy ±0.001Hz, fully compliant with IEC 61000-4-30 Class A standards.
- Display & Operation: 4.3-inch (BRN-D603) / 7-inch (BRN-D603S) full-color TFT LCD with 640×480 resolution, adjustable brightness, 11/12 function keys, multi-language interface, and support for multiple views including real-time parameters, waveforms, bar charts, and phasor diagrams.
- Core Functions: Three-phase full electrical parameters (V/I/P/Q/S/PF/frequency), harmonic/inter-harmonic/higher-order harmonic analysis up to the 63rd order, three-phase unbalance calculation, flicker (PST/PLT) monitoring, COMTRADE-format waveform recording (manual/event/digital input triggered), and power quality event logging including swells/sags/interruptions/inrush currents.
- System Integration & Expansion: Standard Modbus protocol (RS-485), with optional IEC 61850/IEC-103 support for the multi-circuit model D603S, capable of monitoring up to 12 three-phase circuits simultaneously (D603S), with customizable limit alarms, event-triggered recording, and remote operation and maintenance capabilities.
Overview
Select communication protocol, CT/PT ratio, alarm thresholds, and wiring templates to match your deployment requirement in commercial or industrial power systems.
Software Overview
BRN Energy Management System is the digital solution to monitor and optimize your energy consumption and CO2 footprint, giving you the chance to make faster and better decisions based on data insights.
Book a live demo
- Energy management tool for small to large size sites, including industry-specific features
- Innovative cloud-based or on-premise platform and ready-to-use solution thanks to a Software-as-a-Service business model and pre-engineered functionalities which ensure on-site commissioning in less than 1 day
- Cost-efficient solution with add-on and premium services
Energy Manager Modules
Start Matching
- Gain access to site performance data without having devices connected
- Benchmark with other similar buildings in the country
- Access investment opportunities to save energy and lower carbon footprints
- Advise on possible enhancements
- Evaluate achievable targets to improve energy efficiency
Watching
- Visualize real-time and historical trend data from your multi-utility devices
- Assess energy consumption for the different areas, including the one necessary for auditing processes
- Quickly get reports from your energy devices on consumption & generation with related cost allocation
- Forecast your energy profile and ensure bench-marking of data from different sites
Performing
- Immediately recognize site performance by Energy Performance Indicators
- Collect time series data that affect that may affect energy consumption in your plant
- Get rationales by APIs or E-kit
- Integrate distributed energy resources together with energy multi-utility, electrical distribution and industrial equipment
Scanning
- Detect power quality anomalies from your medium and low voltage electrical distribution
- Identify power quality recurrence and impacts according to standardized KPIs
- Be advised on actions which can improve the power quality in your site
- Keep track of improvement activities to measure your benefits
Diagram
Reference wiring and deployment views for installation planning and system integration.
Product Map
Hardware layout reference for interface identification and installation planning.
Key Specs
Core performance highlights for specification review and project planning.
High-Accuracy Measurement
Compliant with IEC 61000-4-30 Class A standards, achieving 0.1% accuracy for voltage and current RMS measurements, and ±0.001Hz for frequency. Delivers trustworthy power quality data for mission-critical commercial and industrial distribution systems.
Wideband Harmonic Analysis
Supports harmonic analysis up to the 63rd order (covering inter-harmonics and higher-order harmonics as well). Accurately pinpoints harmonic sources, evaluates the effectiveness of filtering solutions, and enhances overall system reliability and power utilization efficiency.
Comprehensive Power Quality Event Monitoring
Integrates monitoring and waveform recording for voltage swells/sags, interruptions, inrush currents, and various steady-state limit violations. Supports COMTRADE-format waveform recording, providing solid evidence for fault diagnosis, troubleshooting, and post-event root-cause analysis.
Flexible Communication Integration
Standard Modbus protocol (RS-485) is included, while the multi-circuit model D603S optionally supports IEC 61850 and IEC-103 protocols. Seamlessly integrates with SCADA, BMS, EMS, and power monitoring backend systems for intelligent system-level management.
Versatile Application Scenarios
Available in two form factors: the single-circuit portable model (BRN-D603) and the multi-circuit rack-mount model (BRN-D603S). The multi-circuit version supports simultaneous monitoring of up to 12 three-phase circuits, flexibly addressing diverse monitoring needs ranging from individual critical loads to entire substation switchgear rooms.
Parameters
Detailed technical parameters for model selection and configuration review.
| Function / Parameter | BRN-D603 | BRN-D603S |
|---|---|---|
| General System Parameters | ||
| Dimensions | 230 × 145 × 83 mm | 482.8 × 277.5 × 83 mm |
| Weight | 2.0 kg | 9.5 kg |
| Operating Conditions | 0 °C to +45 °C, Humidity < 90% RH | -10 °C to +45 °C, Humidity < 95% RH |
| Storage Conditions | -20 °C to +50 °C, Humidity < 95% RH | -10 °C to +45 °C, Humidity < 95% RH |
| Input Voltage | AC 100V - 240V, 50Hz | AC 86~265 - 240V, 50Hz |
| Power Consumption | 7 W | Guess based on the power input range. |
| Battery Save | Adjustable LCD backlight brightness and standby time | No data loss during power outage and recovery (with built-in storage). |
| Memory Type | SD | SD |
| Capacity | 32 GB | 64 GB |
| Screen Size | 112.8 × 84.6 mm | 7 inch |
| Resolution | 640 × 480 pixels | 800 × 480 pixels |
| Measurement & Recording Functions | ||
| Waveform Real-time waveforms for Voltage and Current (Phases A, B, C, N) | ✓ | ✓ |
| Frequency / Voltage Frequency, RMS, Phase Angle, Peak Values | ✓ | ✓ |
| Power & Energy Active, Reactive, Apparent Power, Power Factor, 1-63th Harmonic Power | ✓ | ✓ |
| Harmonics THD, DC, Amplitude, Phase Angle, Content (1-63th) | ✓ | ✓ |
| Flicker PST (Short-term), PLT (Long-term) | ✓ | ✓ |
| Imbalance Sequence Voltage/Current and Imbalance Ratios | ✓ | ✓ |
| Event Recording Dips, Swells, Interruptions, Impulse Current, Limit Violations | ✓ | ✓ |
| Analysis Automatic/Manual fault recording and power quality reports | ✓ | ✓ |
| Parameter Accuracy Specifications | ||
| Frequency | 0.001 Hz | 42.5 Hz - 57.5 Hz | ±0.001 Hz | 0.001 Hz | 40.0 Hz - 70.0 Hz | ±0.001 Hz |
| Voltage (RMS) | 0.001 V | 1 V - 1000 V | 0.1% of Nominal | 0.001 V | 0 V - 750 V (Rated value 230V) | 0.1% of Nominal |
| Current (RMS) | 0.001 A | Dependent on Transformer | 0.1% + CT Accuracy | 0.001 A | 0 - 50 A (Rated value 5A or 1A) | 0.1% + CT Accuracy |
| Power | 0.001 W | Dependent on V/I Range | 0.5% + CT Accuracy | 0.001 W | Dependent on V/I Range | 0.5% + CT Accuracy |
| Unbalance | 0.00001 | N/A | Voltage ±0.2% / Current ±0.5% | 0.00001 | N/A | Voltage ±0.2% / Current ±0.5% |
| Flicker Accuracy | 0 - 20 | ±5% | 0 - 20 | ±5% |
| Harmonics Accuracy | Up to 50th Order | 1% nominal) | Up to 64th Order | 1% nominal) |
| Standards & Compliance | ||
| Power Quality | IEC 61000-4-30 (Class A) | IEC 61000-4-30 (Class A) |
| Flicker Standard | IEC 61000-4-15 | IEC 61000-4-15 |
| Harmonics Standard | IEC 61000-4-7 | IEC 61000-4-7 |
| Power Decomposition | IEEE 1459 | IEEE 1459 |
| EMC Immunity | GB/T 17626.2 / .3 / .4 / .5 / .8 / .9 / .12 | GB/T 17626.2 / .3 / .4 / .5 / .8 / .9 / .12 |
| Safety Level | CAT III 1000V / CAT IV 600V | CAT III 1000V / CAT IV 600V |
Related Industries
Software workflows for dispatch, forecasting, planning, and grid reliability.
Accessories
IP66/NEMA 4X Protective Cover
Tailor-made multi-specification protective enclosures for Brilliant industrial equipment. In harsh working conditions involving dust, water splashes, and other contaminants, they are essential. They provide physical protection for internal precision components, elevating the overall protection rating to IP66 or NEMA 4X, ensuring safe and worry-free equipment operation.
USB-to-RS485 Converter
This plug-and-play USB to Serial RS485 Converter is designed to provide a convenient and reliable connection from Brilliant meters or motor controllers to other devices with a USB port.
UL 508A Panel Shop
Pre-configured, pre-wired panel solution is ideal for on-site installations need to meet regional regulatory safety and environmental compliance. All panels are quality tested to be reliable and fault-free.
AC Current Transformers
An AC current transformer (CT) is a crucial measuring device in power systems. Operating on the principle of electromagnetic induction, it proportionally converts high primary currents into standardized low secondary currents (typically 5A or 1A) for use by meters and protective relays. Its primary functions are to provide electrical isolation from high-voltage circuits, ensuring safety, and to extend the range of measuring instruments. It is an essential component for power monitoring and revenue metering.
Inline Fuse
In-line fuse holders are used in places with spatial constraints to provide circuit protection in the event of a fault. It is designed to be safe to the touch and flexible for use in different types of applications.
Test Lead & Voltage Clip
A 4-color (yellow, green, red, black) test lead set featuring standard banana plugs for secure connections and durable flexible insulation. Specially designed for voltage measurement, circuit testing, and multi-channel wiring. The bright color-coding ensures quick identification, making it an essential diagnostic tool for engineers and electronics enthusiasts.
Frequently Asked Questions
Common questions on wiring, setup, and commissioning.
The primary difference lies in the number of monitoring circuits and application scenarios. The BRN-D603 is a single-circuit portable device, ideal for detailed power quality analysis on a single line. The BRN-D603S is a multi-circuit rack-mount device that supports up to 6 analog acquisition boards, capable of monitoring up to 12 three-phase AC circuits simultaneously. It is more suitable for centralized monitoring of entire switchgear rooms or multiple outgoing feeders.
The device offers comprehensive measurement capabilities, including: 1、Basic electrical quantities: Voltage, current, frequency, phase angle, power (active, reactive, apparent), power factor. 2、Power quality indicators: Up to the 64th order voltage and current harmonics (plus inter-harmonics and higher-order harmonics), voltage fluctuation and flicker (PST, PLT), three-phase unbalance (positive, negative, zero sequence). 3、Energy and events: Four-quadrant energy metering, and recording of power quality events such as voltage swells/sags, interruptions, and inrush currents.
To facilitate integration with various backend systems, the device supports multiple mainstream protocols. The BRN-D603 supports the Modbus protocol (via RS-485). The BRN-D603S additionally supports IEC61850 and IEC-103 protocols to meet the higher communication requirements of power automation systems.
The device supports three typical wiring methods. You should select the appropriate method based on your actual power system configuration and correctly configure it in the device parameters: 1、Three-phase four-wire star (wye) connection (3P4W): For common three-phase four-wire systems (with neutral). 2、Three-phase three-wire star (wye) connection (3P3W): For three-phase three-wire systems (without neutral). 3、Three-phase three-wire delta connection (3P3W Delta): For delta-connected loads or lines.
The device's standard current inputs are typically 5A or 1A. When the measured line current is very high, CTs are necessary to step it down to a level the device can process. The CT ratio (e.g., 1000:5) should be selected based on the primary rated current of the line, ensuring that under normal operation, the CT's secondary output current is close to the device's rated input (5A or 1A) for optimal accuracy. An incorrect ratio will cause errors in all current-related readings.
When wiring the device, always follow these safety rules: 1、Reliable grounding: The device enclosure must be securely connected to the ground grid using a dedicated grounding wire of no less than 4mm². This is fundamental for safe operation and noise immunity. 2、Verify power supply: Before powering on, confirm that the device nameplate specifications (AC/DC, 110V/220V) match the on-site power source to prevent damage. 3、Check current circuits: Never open-circuit the secondary side of a CT. Ensure all terminals in the current circuits are tightly secured to avoid generating dangerous high voltages.
You need to operate through the device screen: Navigate to Main Menu -> Parameter Configuration -> Measurement Parameters. There you will find separate pages for Voltage Parameters and Current Parameters to input the ratios of your PT (voltage transformer) and CT (current transformer).
Go to Parameter Configuration in the main menu and select Event Parameters. In this interface, you can set individual trigger thresholds and hysteresis values for various power quality events (e.g., voltage sags, harmonic over-limits, frequency deviations). When the monitored values exceed the defined limits, the device will record the event.
All recorded files can be managed through the File Management menu: 1、Statistical files: Organized by date, storing statistical summaries of power quality parameters and various events. 2、Waveform recording files: Organized by date, storing raw voltage and current waveforms (COMTRADE format) captured during triggered recordings. You can use the F3 and F4 keys to batch delete or delete files individually, and use the F5 key to view detailed file information.
The device operates as a slave station, communicating with the host computer via the RS-485 interface. The communication parameters are fixed: 8 data bits, 1 stop bit, no parity. The protocol transmits data in Big-endian mode. All data (e.g., voltage and current values) are stored as 32-bit floating-point numbers, requiring 2 registers (4 bytes) for reading. The BRN-D603 Modbus address map provides the exact starting address for each parameter, facilitating host software development.
First, verify that the voltage and current wiring is correct, especially regarding phase and polarity. Next, confirm that the wiring method, PT ratio, and CT ratio set in the "Measurement Parameters" match the actual configuration. If the issue persists, check the device's grounding, as poor grounding can introduce interference and affect measurement accuracy.
If the screen freezes or buttons stop responding, it is likely a system software anomaly. Restarting the device will usually resolve most of these issues.
Follow these troubleshooting steps: 1、Try re-plugging the network cable. 2、Check whether the IP address, subnet mask, and gateway address configured in the system parameters match your local network settings.
Use a soft damp cloth and mild soap to wipe the device enclosure. Do not use corrosive agents, solvents, or alcohol, as they may damage the panel markings. For the magnetic pole pieces of the current clamp, you can occasionally wipe them with a slightly oiled cloth to prevent rust formation.
No. The device features a data retention function — data is not lost during power-off or restoration. No erroneous measurements are recorded at the moment of power loss, and upon power recovery, the device automatically resumes its pre-outage operating state and continues monitoring tasks.
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