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Three Phase Four Wire Smart Meters Manufacturer.

High-performance smart metering infrastructure for global utility networks and sustainable energy grids.

Product
Narrative

Technical Innovation & Quality Heritage

YTL’s Three Phase Four Wire Smart Meters (3P4W) are precision instruments designed for industrial, commercial, and high-load residential power systems. As a specialized manufacturer, Zhejiang Yongtailong ensures these meters deliver Class 0.5s or Class 1.0 accuracy while providing comprehensive monitoring of all electrical parameters, including per-phase voltage, current, and harmonics. Equipped with modular communication options like 4G, PLC, or RS485, these smart meters allow utilities to perform remote meter reading and load control with ease. Their rugged design and high surge protection make them ideal for distribution transformers and large-scale factory environments where stable, high-fidelity energy data is critical for operational efficiency and grid stability.

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Technical Datasheet

Technical Category3P4W Smart Meter Specification
Wiring Configuration3 Phase 4 Wire (Star/Wye Connection)
Voltage Rating3x230/400V, 3x120/208V (Customizable)
Current Range5(100)A Direct or 1.5(6)A via CT
Protocol SupportDLMS/COSEM, Modbus-RTU, IEC62056-21
ProtectionIP54 Water and Dust Resistance

Product Application

  • Industrial Factory Load Auditing
  • Commercial Building Sub-metering
  • Transformer Low-Voltage Monitoring

Industrial Factory Load Auditing

In large manufacturing plants, these meters are essential for monitoring high-power machinery and production lines. By tracking three-phase balance and power factor in real-time, engineers can identify equipment inefficiencies or potential failures before they cause downtime. The high-precision data allows for accurate energy cost allocation per unit of production, enabling the facility to implement targeted energy-saving measures and reduce overall operational expenses while maintaining the health of the electrical distribution network and avoiding peak demand penalties.

Commercial Building Sub-metering

Perfect for shopping malls and office towers that mix single-phase and three-phase loads across multiple floors. YTL’s 3P4W meters allow property managers to accurately bill individual tenants based on their actual consumption. Integrated communication modules enable automated billing, eliminating manual errors and reducing administrative labor. The ability to monitor voltage quality ensures that sensitive commercial electronics, such as server rooms and HVAC control systems, are protected from grid fluctuations, improving tenant satisfaction and building safety.

Transformer Low-Voltage Monitoring

Serving as a critical data node at the end of the distribution grid, these meters are installed on the low-voltage side of public transformers. They record voltage sags, swells, and total harmonic distortion (THD), providing utility companies with the data needed to analyze line losses and optimize grid performance. With integrated remote relay control, dispatch centers can manage loads during emergencies or enforce credit-based disconnections, ensuring the local power grid remains resilient and stable under varying demand conditions across the neighborhood.

Product Advantages

Full Parameter Monitoring

Measures active/reactive energy alongside voltage, current, power factor, and harmonics, providing a complete "health check" of your electrical system from a single device.

Modular Communication Slot

Supports swappable modules for 4G, PLC, or RF, allowing utilities to adapt to different infrastructure environments without replacing the entire meter hardware.

High Precision Metrology

Available in Class 0.5s accuracy, making it suitable for high-value industrial billing and grid-level monitoring where even small measurement errors can have significant financial impacts.

Frequently Asked Questions

  • Q: Can this meter work if one phase fails?

    A: Yes, our three-phase meters use a multi-source power supply design; as long as at least one phase is active, the meter remains operational and communicative.

  • Q: What is the maximum current for direct connection?

    A: Our direct-connect models support up to 100A per phase. For higher currents, CT-operated models (1.5(6)A) must be used with external transformers.

  • Q: Does it support Time-of-Use (TOU) billing?

    A: Yes, it features a temperature-compensated RTC and supports up to 8 tariffs and multiple seasons for complex utility billing structures.

  • Q: Can it detect energy theft?

    A: Absolutely. It includes sensors for terminal cover opening, magnetic interference, and phase-bypass detection to protect utility revenue.

  • Q: Is it compatible with DLMS protocol?

    A: Yes, YTL meters strictly follow the DLMS/COSEM global standard, ensuring seamless integration with diverse utility Head-End Systems (HES).

Welcome To A National High-tech Enterprise

Established in 2000, Zhejiang Yongtailong Electronic Co., Ltd. is located in Tongxiang. As a professional Three Phase Four Wire Smart Meters manufacturers and Three Phase Four Wire Smart Meters suppliers in China , YTL designs and produces electronic energy meters which are cost-efficient and ideal for the use in solutions for AMR/AMI at residential as well as industrial applications.YTL was one of the first companies in the domestic market with which had an internal R&D department as well as international sales business. Since our foundation in 2000 we have grown to a manufacturer which complies and meet to many specifications from our national and international partners. At present our export volume makes us a leading company for technology and product export to more than 60 countries throughout the world.YTL is devoted to develop and design all types of electronic energy meters, concentrators and solution applications. With a combined design of the special accessories, we have successfully developed series of competitive products of small size, multifunction, low power consumption and excellent performance. We offer a one-to-one service to our partners. With annually over 68 projects that are successfully finished and holding over 500 patents of design rights, we are also advanced in the technology and patents of current sampling.

  • 2000

    Established In

  • 500+

    Employees

  • 60+

    Export
    Countries

  • 500+

    Patent

  • 10million+

    sets per year

YTL Honor

  • MID
  • KEMA
  • DLMS
  • IEC
  • KEMA
  • SGS

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