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Wenzhou Legy Electric Meter Technology Co., Ltd., established in 2002 in Wenzhou, China, is a specialized manufacturer dedicated to the engineering and production of Three Phase Multifunction Energy Meters. As a trusted B2B supplier, our factory delivers robust power monitoring instruments that prioritize comprehensive parameter visibility and offline reliability for industrial facilities, commercial complexes, and energy management integrators. Leveraging over two decades of electrical manufacturing expertise, every Three Phase Multifunction Energy Meter is built with rigorous quality control, ISO9001 certification, and international safety approvals including CE, and ROHS. We combine precision three-phase metering with intuitive multi-parameter display capabilities to provide global partners with reliable products that enable on-site electrical diagnostics and proactive maintenance without reliance on external communication networks.
A Three Phase Multifunction Energy Meter is an advanced electronic instrument designed to measure and record three-phase electrical parameters including voltage, current, active/reactive/apparent power, power factor, frequency, and energy consumption. It integrates precision three-phase metering with real-time parameter display and data logging capabilities, providing a complete picture of three-phase electrical system performance. Belonging to the category of offline power monitoring instruments, it is an essential tool for three-phase load balancing, equipment protection, and energy efficiency management, enabling users to identify phase imbalances, prevent equipment damage, and optimize power usage in three-phase applications without requiring smart grid connectivity.
Three Phase Multifunction Energy Meter features a 4-line dot-matrix LCD that displays all three phase voltages, currents, and total active power simultaneously on a single screen, eliminating the need to toggle between phases and enabling instant visual assessment of three-phase system health.
Equipped with a dedicated "MOD" key that cycles through power factor, frequency, reactive power, and phase angle on the top line while keeping three-phase current and voltage fixed on the lower lines, allowing electricians to monitor critical parameters without navigating complex sub-menus.
Supports local configuration of current and voltage transformer ratios using only physical buttons, with a shift+increase key combination for decimal point adjustment, enabling on-site calibration without laptops, communication cables, or proprietary software.
Offers both fixed display mode for locking onto specific parameters like total kWh during routine checks, and auto-cycle mode that rotates through all measured values at user-defined intervals for comprehensive monitoring without manual intervention.
Utilizes industrial-grade non-volatile memory to store cumulative three-phase energy and parameter data for over 10 years without power, ensuring data integrity and continuity even during extended outages or in off-grid installations.
The Three Phase Multifunction Energy Meter 4-line simultaneous display architecture removes the critical safety and diagnostic blind spots inherent in single-line or scrolling meters. By presenting all three phase voltages and currents concurrently, it prevents the misdiagnosis of intermittent phase imbalances that often occur between button presses, ensuring that maintenance personnel never miss a transient fault that could lead to motor burnout or equipment failure.
Operating entirely without communication modules or cloud dependencies guarantees absolute data sovereignty and immunity to cyber threats. This offline architecture is specifically engineered for high-security industrial facilities, government installations, and remote sites where network isolation is mandatory, ensuring that sensitive three-phase energy data remains physically contained and tamper-proof.
The physical button interface with decimal point adjustment enables complete meter reconfiguration in the field without any external tools, laptops, or proprietary software. This design eliminates the logistical burden of carrying calibration equipment to remote sites and allows electricians to adapt the meter to changing CT/PT ratios or phase sequences on the spot, reducing commissioning time from hours to minutes.
The fixed lower lines for three-phase current and voltage combined with the single-key cycling of derived parameters on the top line create a consistent visual hierarchy that reduces operator cognitive load. This intuitive layout minimizes training requirements and prevents configuration errors, as maintenance staff can instantly recognize the meter's state without memorizing complex menu trees or button sequences.
By removing communication modules, cloud service subscriptions, and software licensing fees, the meter delivers comprehensive three-phase monitoring at a fraction of the total cost of ownership of smart alternatives. This cost structure makes advanced three-phase parameter visibility accessible to budget-constrained facilities and retrofit projects where the premium for connectivity cannot be justified, while still providing the diagnostic capabilities needed for proactive maintenance.
Three Phase Multifunction Energy Meter is installed directly on motor control centers to visually monitor phase voltage balance and current symmetry in real time. Maintenance teams can instantly spot phase imbalances or abnormal power factors through the multi-row display, preventing motor overheating and extending equipment lifespan without relying on remote software.
Used on individual heavy-duty machines like compressors and crushers to track three-phase active power consumption. The auto-cycle display allows operators to verify energy usage during shift handovers, ensuring fair cost allocation and identifying inefficient machinery through direct visual inspection.
Mounted inside tenant distribution panels to display three-phase voltage, current, and total kWh simultaneously. Property managers can verify meter readings on-site during inspections without needing communication software, ensuring transparent billing and reducing disputes over three-phase energy charges.
Monitors three-phase power consumption for central air conditioning and lighting systems. The fixed display mode locks onto total kWh for quick daily checks, while the auto-cycle mode reveals power factor and frequency during maintenance, helping facility teams optimize three-phase load distribution visually.
Used by electricians during panel commissioning to visually compare phase currents and voltages across all three lines. The 4-line display eliminates the need to toggle through menus, allowing instant identification of unbalanced loads and immediate adjustment of three-phase breakers on-site.
Deployed for temporary energy audits in facilities with no network coverage. The meter’s non-volatile memory stores 12 months of three-phase energy data, which can be read directly from the display or via infrared during site visits, providing reliable audit data without any communication infrastructure.
A: Yes, the Three Phase Multifunction Energy Meter 4-line LCD is specifically designed for three-phase visibility. The top line shows phase voltage or power factor, the second and third lines display three-phase currents and voltages respectively, and the bottom line shows total active power or kWh. This layout allows electricians to monitor all three phases and key parameters at a single glance without pressing any buttons.
A: Press and hold the "MOD" key for 3 seconds to enter the parameter menu. The display will show the current CT ratio on the top line. Use the shift and increase keys to adjust the value, and the decimal point can be set by pressing both keys simultaneously. Press "MOD" again to save and exit. The entire process takes less than 30 seconds and requires no external tools.
A: Yes, the meter uses industrial-grade non-volatile memory that retains all three-phase energy and parameter data for over 10 years without power. When power is restored, the meter resumes normal operation with all historical three-phase data intact, and the LCD backlight automatically activates to display the current three-phase parameters for immediate verification.
Wenzhou Legy Electric Meter Technology operates a 5,000㎡ dedicated production line for offline Three Phase Multifunction Energy Meters, featuring automated display calibration stations and environmental chambers simulating -25°C to +55°C temperature cycles and 95% humidity. Our quality assurance includes 100% three-phase display accuracy verification, 50,000+ cycle button durability testing, and non-volatile memory validation, ensuring every unit meets offline monitoring standards before shipment. We provide specialized OEM/ODM services for display-centric meters, including custom LCD layouts, button configurations, and enclosure adjustments for specific panel cutouts, with a minimum order of 200 units and a 25-day lead time for customized models. Our export team has 18+ years of experience in global electrical trade, offering end-to-end customs clearance and logistics support, with products certified for EU, North American, Middle Eastern, and Southeast Asian markets. We are committed to building long-term partnerships with global utilities, distributors, and EPC contractors, offering competitive pricing, flexible payment terms, and dedicated technical support to help partners succeed in the offline energy metering landscape.
We offer free technical training for distributors and installers, covering offline meter installation, physical button configuration, and display logic troubleshooting, ensuring optimal product performance in the field. Our after-sales team provides 24/7 technical support with a 48-hour response guarantee for critical issues, and we maintain a 98% on-time delivery rate across all global shipments. We actively participate in international offline metering standards development and collaborate with leading panel manufacturers on pilot projects, ensuring our display-centric metering solutions remain at the forefront of technological advancement. Our cooperative philosophy centers on "precision, reliability, and mutual growth," and we sincerely look forward to partnering with forward-thinking organizations to shape the future of offline three-phase multi-parameter energy measurement worldwide.
