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Three Phase Four Wire 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 Meters (3P4W) are the robust industrial standard for measuring energy in balanced and unbalanced three-phase networks. Essential for manufacturing plants, commercial malls, and large residential estates, these meters measure energy across three live phases and a neutral connection, ensuring complete accuracy even when phase loads are unevenly distributed. As a specialized manufacturer, Zhejiang Yongtailong has optimized the internal architecture to withstand the heavy electrical noise and harmonic distortion common in industrial environments. Featuring high-surge immunity and optional remote communication modules, our 3P4W meters provide utility-grade precision for revenue billing and power monitoring, ensuring that every phase of your operation is measured with unmatched reliability and legal compliance.

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Technical Datasheet

Technical Category3P4W Industrial Specs
Voltage Connection3x230/400V (Standard) / 3x120/208V (ANSI)
Current RangeDirect Connect (up to 120A) or CT-operated (1.5/6A)
Reference Frequency50Hz or 60Hz (+/- 5%)
Operating Temp-40掳C to +70掳C (Extended Industrial Range)
Protection ClassIP54 (Dust and Water Splash Resistant)

Product Application

  • Heavy Industrial Plants
  • Main Office Distribution
  • Cold Storage Warehouses

Heavy Industrial Plants

Specifically built for factories running large 3-phase motors and CNC machinery. The meter accurately tracks energy even when phase loads fluctuate rapidly, providing essential data for calculating production energy costs per unit and identifying inefficient shifts.

Main Office Distribution

Installed at the main breaker of commercial office buildings to monitor total consumption. It handles the unbalanced loads caused by lighting and computer equipment distributed across different floors and phases, ensuring fair and accurate utility billing.

Cold Storage Warehouses

Ideal for refrigeration facilities where power reliability is critical. The meter monitors phase voltage and current in real-time, alerting facility managers to phase loss or voltage drops that could damage cooling equipment and lead to spoiled inventory.

Product Advantages

Phase Loss Detection

Immediately records an event and alerts the system if one phase goes down, protecting 3-phase motors from expensive "single-phasing" damage and burnout.

High Surge Immunity

Equipped with 6kV impulse voltage protection to withstand lightning strikes and switching surges commonly found in heavy-duty industrial power grids.

Unbalanced Load Precision

Engineered to maintain Class 1.0 accuracy even in extreme cases where one phase is heavily loaded while others are idle, a common issue in commercial buildings.

Frequently Asked Questions

  • Q: Can this be used in a 3-wire system without a neutral?

    A: No, 3P4W meters require a neutral connection for accurate measurement and internal power supply. For 3-wire systems, please see our dedicated 3P3W models.

  • Q: What is the benefit of the 4th wire (Neutral)?

    A: The neutral wire allows the meter to measure each phase independently against ground, which is essential for accuracy in systems where loads are not perfectly balanced.

  • Q: Do you offer DIN-rail or Wall-mount versions?

    A: Yes, we provide both compact 7-module DIN-rail models for modular panels and traditional wall-mount versions for utility meter boxes.

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

    A: Our standard 3P4W direct meters handle up to 100A or 120A per phase. For currents exceeding this, a CT-operated version (1.5/6A) must be used.

  • Q: Does it measure individual phase voltage?

    A: Yes, the meter displays and records the voltage, current, and power factor for Phase A, B, and C individually on the LCD and through the data interface.

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 Meters manufacturers and Three Phase Four Wire 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
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