UT281E+ 10,000A Flexible AC Current Meter

UNI-T UT281E+ 10000A Flexible Clamp Meter

High-Capacity Current Measurement with Exceptional Flexibility

The UNI-T UT281E+ is a high-precision True RMS flexible clamp meter designed for measuring extreme currents up to 10,000A AC. Featuring an extra-long 1100mm (43-inch) flexible coil that can accommodate conductors up to 340mm in diameter, it provides unmatched versatility for challenging measurement scenarios. With 6000-count resolution, inrush current capability, and 999-set data storage, this professional-grade instrument delivers reliable performance for power distribution, industrial manufacturing, electrical engineering, smelting operations, and renewable energy installations where traditional rigid clamps cannot reach or handle the extreme current levels.

Key Features

• Exceptional Current Range: Measures up to 10,000A AC with precision
• Extra-Long 1100mm (43-inch) Flexible Coil: Easily fits around large bus bars and cable bundles
• True RMS Measurement: Accurate readings on non-sinusoidal waveforms and distorted signals
• 6000 Count Resolution: High precision for detailed analysis
• Inrush Current Measurement: Captures startup current spikes in motors and equipment
• Data Storage: Records up to 999 measurements for later analysis
• Full-Range Overload Protection: Enhanced safety in high-current environments
• Comprehensive Measurement Capability: AC current, voltage, frequency, and resistance
• Dual Display: Shows current and frequency simultaneously
• CAT III 1000V / CAT IV 600V Safety Rating: Professional-grade protection for industrial environments

Superior Flexibility for Challenging Measurement Environments

The UT281E+ features an innovative 1100mm (43-inch) flexible Rogowski coil that can measure conductors up to 340mm in diameter, enabling measurements in areas where traditional rigid clamp meters cannot access. This exceptional flexibility allows technicians to navigate crowded electrical panels, tightly packed cable bundles, and irregularly shaped conductors without compromising measurement accuracy.

The flexible design eliminates the alignment and jaw opening limitations of conventional clamp meters, making it ideal for measuring large bus bars, multiple cables, and awkwardly positioned conductors in industrial power distribution systems. Combined with its 10,000A measurement capacity, the UT281E+ provides unprecedented capability for heavy industrial applications and high-capacity power systems.

Comprehensive Measurement Capabilities

The UT281E+ combines essential electrical measurements with specialized industrial functions to deliver complete diagnostic capabilities for power professionals. Beyond high-capacity current measurement, it offers:

• AC voltage measurement up to 1000V with True RMS precision
• DC voltage measurement across multiple ranges for system diagnostics
• Frequency measurement for power quality analysis
• Resistance measurement up to 60MΩ
• Continuity testing with audible indication
• Inrush current capture for motor and equipment startup analysis
• Data storage for 999 measurements to track system performance
• Dual display showing current and frequency simultaneously
• Data hold function for convenient reading capture
• Low voltage indication to prevent unreliable measurements
• Auto power-off for extended battery life
• High voltage alarm for enhanced safety awareness

This comprehensive measurement suite makes the UT281E+ the ideal tool for industrial professionals who need to evaluate high-capacity current systems without interrupting circuits or requiring system shutdown.

Professional Applications

Power Distribution Systems

Power engineers and maintenance technicians rely on the UT281E+'s flexible coil and high current capacity for:

• Main feeder current monitoring in industrial facilities
• Load balancing across three-phase systems
• Substation current measurement
• Generator output verification
• Distribution panel load analysis

Industrial Manufacturing

Maintenance engineers leverage the UT281E+'s flexible design for diagnostics in complex manufacturing environments:

• Large motor current consumption analysis
• Production line power verification
• Machinery start-up current profiling
• Electrical system troubleshooting
• Predictive maintenance current monitoring

Renewable Energy Systems

Solar and wind system technicians utilize the UT281E+ for:

• Large-scale solar inverter current verification
• Wind turbine generator output measurement
• Battery storage system performance analysis
• DC-AC conversion efficiency testing
• Photovoltaic array combined current monitoring

Smelting and Heavy Industry

Process engineers in heavy industrial facilities depend on the UT281E+ for:

• Furnace and heater element current verification
• High-capacity motor load analysis
• Power consumption monitoring of industrial processes
• Electric arc furnace current measurement
• High-current bus bar verification

Technical Specifications

Additional Features

• Display Count: 6000
• True RMS Measurement: Yes
• Coil Length: 1100mm (43 inches)
• Maximum Measurable Conductor Diameter: 340mm (13.4 inches)
• Data Storage: 999 sets
• Frequency Response: 45Hz~500Hz
• Continuity Test: Yes
• Inrush Current Measurement: Yes
• Backlight: Yes
• Data Hold: Yes
• Low Voltage Indication: Yes
• Auto Power Off: Yes
• High Voltage Alarm: Yes
• Safety Rating: CAT III 1000V / CAT IV 600V
• Operating Environment: 0°C to 40°C (32°F to 104°F), Humidity ≤ 75%
• High Accuracy Range: 18°C to 28°C (64°F to 82°F), Humidity ≤ 75%
• Storage Temperature: -10°C to 50°C (14°F to 122°F)
• Power Supply: 3 x AAA 1.5V Batteries

Package Contents

• UNI-T UT281E+ Flexible Clamp Meter
• Test Leads
• 3 x AAA Batteries
• User Manual
• Carrying Case
• Certificate of Calibration

Product Comparison

Frequently Asked Questions

What advantages does the 1100mm flexible coil provide over traditional rigid clamp meters?

The UT281E+'s 1100mm (43-inch) flexible coil provides significant advantages in three key areas: access, conductor size, and measurement versatility. Unlike rigid clamp meters that require sufficient clearance to open their jaws around a conductor, the flexible coil can be easily threaded through tight spaces in crowded electrical panels. It accommodates conductors up to 340mm in diameter, far exceeding the typical 30-60mm limitation of rigid clamps. Additionally, the flexible design allows measurement of irregular shapes, bus bars, and multiple cable bundles that would be impossible with traditional clamps, making it invaluable for industrial applications where space is limited and conductors are large or unusually shaped.

How does the 10,000A measurement capacity benefit industrial applications?

The UT281E+'s exceptional 10,000A measurement capacity addresses the needs of heavy industrial applications, large-scale power distribution, and high-capacity systems that exceed the capabilities of standard clamp meters. This high range is essential for main feeders in industrial facilities, primary distribution panels, high-capacity motor systems, smelting operations, and large renewable energy installations. By providing accurate measurements at these extreme current levels, the UT281E+ eliminates the need for system interruption or installation of specialized measurement equipment, allowing technicians to safely evaluate system performance under full load conditions without downtime or complex setup procedures.

What makes the inrush current function valuable for maintenance technicians?

The inrush current function captures the momentary high-current spike that occurs when motors, transformers, and other inductive loads are first energized. This startup current can be 6-10 times higher than normal operating current and is a critical diagnostic parameter for evaluating system performance and preventing nuisance tripping of protective devices. The UT281E+'s ability to capture these transient events provides maintenance technicians with valuable insights for proper circuit breaker sizing, motor health assessment, and troubleshooting intermittent startup issues. Without this specialized function, these brief but significant current events would be missed during standard measurements, potentially leading to incorrect system evaluation.

How does the data storage capability enhance diagnostic procedures?

The UT281E+'s ability to store 999 measurements transforms it from a simple measurement tool into a comprehensive system analysis device. This storage capability allows technicians to record measurements at multiple points throughout a system without manually logging values, enabling complete circuit analysis and load distribution evaluation. The stored data facilitates trend analysis for detecting performance degradation over time, comparison of similar systems for efficiency evaluation, and documentation of system behavior under various load conditions. When combined with the high-capacity measurement capability and flexible coil, this storage function makes the UT281E+ particularly valuable for complex industrial systems where comprehensive analysis rather than spot-checking is required.

What safety features are incorporated into the UT281E+?

The UT281E+ incorporates multiple safety features for protection in high-energy industrial environments. Its CAT III 1000V / CAT IV 600V safety rating ensures protection against transient voltages in industrial power systems and service entrance locations. The full-range overload protection circuit prevents internal damage and operator hazards when encountering unexpected high currents. The high voltage alarm provides audible and visual warnings when dangerous voltage levels are detected, while the low battery indication prevents unreliable measurements that could lead to incorrect system evaluation. These comprehensive safety features, combined with the inherent safety advantage of flexible coil technology that maintains separation between the operator and high-current conductors, make the UT281E+ a secure choice for industrial power measurements.

Support and Warranty

UNI-T stands behind the UT281E+ with comprehensive technical support and a 1-year warranty. Our dedicated support team is available to assist with application questions, measurement techniques, and warranty service.

Professional Current Measurement for Extreme Industrial Applications

The UNI-T UT281E+ Flexible Clamp Meter delivers unmatched capability for high-current measurement in challenging industrial environments. With its exceptional 10,000A capacity, extra-long 1100mm flexible coil, and comprehensive measurement functions, it provides power professionals with the versatility and precision needed for today's demanding electrical systems. Whether evaluating main distribution feeders, troubleshooting large motor systems, or verifying renewable energy installations, the UT281E+ offers the perfect combination of flexibility, measurement range, and durability for professional technicians.

Order Your UNI-T UT281E+ Today and Experience Professional-Grade Flexible Current Measurement Capabilities