Product Overview
The YADA ET903-E / ET70-E series power meter are engineered to reliably monitor three-phase electrical systems. They support a wide range of electrical measurements including voltage, current, active and reactive power, total energy (kWh / kVarh), power factor, and more. With built-in communication (Modbus RS-485, optional RS-232, TCP/IP, etc.), these meters can integrate into SCADA, BMS, and energy management systems for real-time data acquisition and monitoring.
This robust meter suits distribution panels, factories, energy control centers, and commercial buildings. It is designed to deliver long-term stability and accurate readings under varied load conditions.
Key Features & Benefits
Class 0.5S Accuracy
Provides high-accuracy electrical measurement for reliable energy data and professional power monitoring.
Three-Phase Multifunction Measurement
Measures key electrical parameters including voltage, current, power, power factor, frequency and energy.
CT-Based Current Measurement
Supports flexible current measurement through external current transformers for distribution and high-current applications.
RS485 Modbus RTU
Uses standard RS485 Modbus RTU communication for easy integration with EMS, SCADA, BMS and PLC systems.
Panel-Mount Installation
Designed for convenient installation in electrical distribution panels, control cabinets and monitoring systems.
Technical Specifications
| Product Name | YADA ET903-E/ ET703-E Multi-functional 3-Phase Power Meter | |||
| Meter Type | Three Phase Power Meter | |||
| Model No. | ET903-E/ ET703-E Series | |||
| Brand Name | YADA | |||
| Display Type | LCD Display | |||
| Measuring Energy Range | 0-99999.99kWh | |||
| Phase | 3 Phase | |||
| Accuracy Class | Class 0.5s | |||
| Operating Temperature | -10℃~ 50℃ | |||
| Communication | RS485(Modbus-RTU) | |||
| Installation | Panel Mounted, Size 92*92mm, 68*68mm optional | |||
| Input current | 5(6)A | |||
| Input Voltage | AC220V/380V | |||
| Auxiliary Power | AC85-265V / DC100-330V | |||
| Certificate | CE Certification(EN61010-1:2010, EN61000-6-1:2007+A1:2011, EN61000-3-2:2014, EN61000-3-3:2013, EN61000-6-2:2005) | |||
| Warranty | 2 Years | |||
| Dimensions | ET903-E: 98mm*98mm*78mm | |||
| ET703-E: 74mm*74mm*88mm | ||||
| Panel Mounted Size | 68*68mm | |||
| Net Weight | 0.327KG | |||
Wiring
Dimension & Installation
Certificates
Applications
The YADA ET903-E/ ET703-E three-phase energy meter is ideal for:
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Industrial plants and manufacturing facilities
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Commercial buildings and offices
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Energy management systems in factories
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SCADA / BMS / EMS integration for centralized monitoring
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Billing and load analysis systems
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Renewable energy plants and solar power systems
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Data centers and infrastructure monitoring
Why Choose YADA ET903-E / ET703-E?
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Proven Expertise — Decades of specialization in energy metering and power instrumentation
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Reliable Performance — Strict quality control, CE compliance, stable long-term operation
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Customization Options — Support for optional interfaces, firmware modifications, labeling
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Global Support & Warranty — Technical support, replacement policy, long-term parts availability
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High Precision & Stability — Suitable for both monitoring and billing-level accuracy
FAQ
What is the accuracy class of this meter?
The meter provides Class 0.5S measurement accuracy for reliable electrical and energy monitoring.
Does the meter support RS485 communication?
Yes. The meter supports RS485 communication with Modbus RTU protocol for integration with EMS, SCADA, BMS and PLC systems.
Does it require an external CT?
The meter uses CT-based current measurement. The appropriate CT ratio should be selected according to the actual current range and project requirements.
Can the meter be used for solar PV systems?
Yes. It can be used for electrical monitoring in suitable AC-side solar PV applications.
Can multiple meters be connected to one monitoring system?
Yes. RS485 Modbus RTU communication allows multiple meters to be networked for centralized monitoring, subject to the system architecture and communication configuration.
Can YADA provide the CT together with the meter?
Yes. YADA can provide compatible current transformers to support complete meter + CT measurement solutions.
What applications is this meter suitable for?
Typical applications include industrial distribution, energy management, solar PV, smart buildings, data centers, control panels and commercial energy monitoring.
Can you support OEM or ODM projects?
YADA supports OEM, ODM and project-based requirements depending on product configuration and customization requirements.
How do I select the correct meter configuration?
Please provide your system voltage, CT ratio or current range, wiring type, communication requirements and application. Our engineers can recommend a suitable configuration.
Can I request a technical datasheet before ordering?
Yes. Contact YADA with your project requirements and we can provide the relevant technical information for product selection.
Global Project Support
YADA provides professional power measurement and control products for industrial, commercial and new-energy applications.
With in-house R&D, manufacturing, testing and technical support capabilities, YADA supports OEM, ODM and project-based requirements.
Need a Suitable Configuration?
Send us your:
- System voltage
- Current or CT ratio
- 3P3W or 3P4W system
- Communication requirements
- Application
Our engineers can recommend the suitable meter configuration and compatible CT solution for your project.
Contact YADA for Technical Recommendation and Project Support.