Power Meter
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Multifunction power meters from YADA Electronics — a Guangdong-based manufacturer (Beijing Stock Exchange: 920556) building three-phase panel instruments for industrial distribution, commercial buildings and smart energy management. This category holds 3 models, all with RS-485 Modbus RTU and full three-phase electrical parameter measurement.
Multifunction Meter Or Energy Meter — Which One You Actually Need
An energy meter answers one question: how many kilowatt-hours passed this point. A multifunction power meter answers a different one: what is the electrical condition of this circuit right now — voltage balance, power factor, frequency, loading. Sites that only need billing data should buy an energy meter. Sites troubleshooting nuisance tripping, transformer heating or power-factor penalties need the multifunction instrument.
| Model | Role | Best Suited To |
|---|---|---|
| YD2040Y | Three-phase multifunction power meter with energy analysis | Industrial distribution boards, smart energy management systems. |
| YD2037Y | Three-phase multifunction power meter | Industrial power distribution where panel space is fixed. |
| ET903 / ET703 | Three-phase power quality analyser | Sites where distortion or voltage quality is under investigation, not just consumption. |
Power Meter Technical Specifications
| Parameter | Specification |
|---|---|
| Phase configuration | Three-phase |
| Measured parameters | Voltage, current, active / reactive power, power factor, frequency, energy |
| Communication | RS-485 Modbus RTU |
| Power quality | Supported on ET903 / ET703 |
| Application class | Industrial, commercial and smart energy management |
Typical Applications
- Industrial distribution boards — incomer and feeder monitoring.
- Energy management systems — Modbus data feeding cost-allocation and load-profiling platforms.
- Power-factor investigation — establishing whether a utility penalty is justified before buying correction equipment.
- Data centres and telecom facilities — continuous electrical condition monitoring.
- Commercial buildings — main-switchboard instrumentation.
How To Select A Power Meter
- Decide what question the meter answers. Consumption only, or electrical condition as well.
- Confirm the CT ratio feeding the meter and whether existing CTs can be reused.
- Check the panel cut-out and depth available behind the door.
- Confirm the protocol and register map your EMS expects — Modbus RTU register layouts are supplied with the meter.
- Decide whether power quality is in scope. If harmonics or voltage events matter, specify the ET903 / ET703 or a dedicated analyser.
Frequently Asked Questions
What is the difference between these and the AC energy meters?
These are panel-mounted multifunction instruments reporting the full electrical condition of a three-phase circuit. The AC energy meter range is DIN-rail mounted and optimised for kilowatt-hour accounting and billing.
Do they need external current transformers?
Yes — panel multifunction meters are CT-operated. YADA manufactures the matching current transformers, so ratio and accuracy class can be specified together.
Can they detect power-factor penalties?
Yes. Power factor is a standard measured parameter, which is normally the first evidence needed before investing in correction equipment.
Related Product Categories
- Power Quality Analyzers — for IEC 61000-4-30 Class A compliance measurement.
- Current Transformers — the CTs these panel meters require.
- AC Energy Meters — DIN-rail metering for billing and sub-metering.
- Active Harmonic Filters — correction equipment for the problems these meters reveal.
- Remote Signaling & Control Units — digital I/O alongside the analogue measurement.
Request A Power Meter Quote
Send the CT ratio, panel cut-out dimensions, the parameters you need reported and the protocol your EMS expects. YADA’s engineering team confirms the model and register map.