UNI-T UT513A 5kV Insulation Resistance Tester for Industrial Applications

Overview

The UNI-T UT513A is a professional-grade 5kV insulation resistance tester designed for electrical engineers, maintenance professionals, and contractors who require reliable high-voltage testing capabilities in demanding industrial environments. This powerful diagnostic instrument delivers precise measurements up to 1000GΩ, making it ideal for evaluating the insulation integrity of heavy machinery, power distribution equipment, and critical electrical infrastructure components.

With multiple test voltage settings ranging from 500V to 5000V, the UT513A provides the versatility needed to test various types of electrical equipment according to industry standards. Its comprehensive measurement capabilities, including Polarization Index (PI) and Dielectric Absorption Ratio (DAR) testing, offer invaluable insights into insulation quality that go beyond basic resistance readings.

Engineered for field reliability with a rugged housing and intuitive interface, the UNI-T UT513A combines industrial-grade performance with user-friendly operation to streamline your insulation testing workflow.

Key Features

• High voltage output up to 5kV for testing heavy industrial equipment
• Wide resistance measurement range up to 1000GΩ
• Selectable test voltages: 500V, 1000V, 1500V, 2500V, and 5000V
• Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurement
• Automatic voltage discharge after test completion for safety
• Large LCD with backlight for clear visibility in all working conditions
• Analog bar graph with 30 segments for trend visualization
• Comparison measurement function for quick pass/fail assessment
• High voltage warning indicators for enhanced operator safety
• Data storage for 18 measurement sets
• Auto power-off function to conserve battery life
• CAT III 600V safety rating for industrial environments
• Powered by 8 x 1.5V batteries with extended operating time

UNI-T UT513A Details

Versatile High-Voltage Testing

The UT513A excels in diverse testing scenarios with five selectable test voltages (500V, 1000V, 1500V, 2500V, and 5000V). This versatility allows technicians to match test voltage to equipment specifications or comply with specific industry standards. The wide measurement range from 0.5MΩ to 1000GΩ enables comprehensive testing of everything from small motors to large power transformers and underground cables, making this a truly versatile instrument for any electrical maintenance professional.

Advanced Insulation Analysis

Beyond simple resistance measurements, the UT513A performs time-based insulation quality assessments through Polarization Index (PI) and Dielectric Absorption Ratio (DAR) functions. These critical measurements provide deeper insights into insulation condition, revealing issues like moisture ingress, contamination, and aging that standard resistance tests might miss. By identifying these problems early, maintenance teams can prevent costly equipment failures and extend asset lifespans.

Operator-Focused Design

The UNI-T UT513A features a thoughtfully designed interface that prioritizes operator comfort and safety during extended testing sessions. The large, backlit LCD display ensures clear reading of measurements in any lighting condition, while the analog bar graph provides visual indication of measurement trends. The comparison measurement function allows quick pass/fail assessment against predetermined standards, streamlining the testing process and reducing the chance of misinterpretation.

Comprehensive Safety Features

Safety is paramount when working with high voltages, and the UT513A incorporates multiple protective features to safeguard both the operator and the equipment under test. Automatic voltage discharge after test completion prevents dangerous residual voltages, while high voltage warning indicators provide clear visual notification when the instrument is generating test voltages. The live circuit detection prevents accidental testing on energized equipment, and the CAT III 600V safety rating ensures protection in industrial environments.

Professional Applications

Electric Power Distribution

Power distribution engineers and technicians rely on the UT513A for comprehensive insulation testing of transformers, switchgear, and underground cables. The 5kV test capability meets utility industry standards, while the PI and DAR functions help identify aging insulation before failures occur, preventing costly outages and service interruptions.

Industrial Maintenance

Maintenance professionals depend on the UT513A to implement effective predictive maintenance programs for motors, generators, and critical electrical systems. By establishing baseline insulation measurements and tracking changes over time, maintenance teams can identify deteriorating insulation before equipment failure, reducing unplanned downtime and extending asset life.

Electrical Contracting

Electrical contractors use the UT513A for commissioning and acceptance testing of newly installed equipment and cables. The comparison measurement function allows quick verification against specification requirements, while the data storage feature provides documentation for quality assurance and client reporting.

Manufacturing Quality Control

Manufacturing quality control departments implement the UT513A in production testing protocols for motors, transformers, and high-voltage components. The instrument's reliable measurements and comparison capabilities ensure that only products meeting insulation standards are shipped to customers, maintaining quality reputation and reducing warranty claims.

Technical Specifications

Package Contents

• UNI-T UT513A Insulation Resistance Tester
• 2pcs of one plug test leads to one alligator clip (black and green)
• 1pc of two plugs test lead to one alligator clip (red)
• USB cable
• Power adaptor
• 8 x 1.5V LR14 batteries
• English user manual
• Carrying case
• Test certificate

UNI-T Insulation Tester Comparison Table

FAQ

What is the difference between Polarization Index (PI) and Dielectric Absorption Ratio (DAR)?

PI is the ratio of insulation resistance measured at 10 minutes compared to the value at 1 minute, providing insight into long-term insulation quality and moisture/contamination presence. DAR is the ratio of resistance at 60 seconds to the value at 30 seconds, offering a quicker assessment of insulation condition. Both measurements help evaluate insulation beyond simple resistance readings.

How often should I calibrate my UT513A?

For critical applications, annual calibration is recommended to ensure measurement accuracy. However, if the instrument is frequently used in harsh environments or shows signs of measurement drift, more frequent calibration may be necessary.

What makes the UT513A suitable for industrial environments?

The UT513A features a rugged construction designed to withstand industrial conditions, a CAT III 600V safety rating for protection in high-energy environments, and a high voltage output up to 5kV that meets testing requirements for industrial equipment. Its comprehensive measurement capabilities and intuitive interface make it ideal for field technicians working in demanding conditions.

How does the UT513A compare to competitors in the same price range?

The UNI-T UT513A offers exceptional value with features often found in more expensive models. Compared to similar 5kV testers like the ETCR 3500, the UT513A delivers comparable accuracy and functionality at a more accessible price point. Its combination of advanced measurement capabilities, user-friendly interface, and robust construction makes it an excellent choice for professionals seeking reliable performance without premium pricing.

Can the UT513A be used to test photovoltaic installations?

While the UT513A is capable of high-voltage insulation testing required for many components in photovoltaic systems, UNI-T offers specialized models like the UT503PV specifically designed for PV applications with additional features tailored to solar installations. For comprehensive PV testing, consider the specialized model.

Customer Testimonials

"After using the UT513A for six months in our preventive maintenance program, we've identified several motors with deteriorating insulation before they failed. The PI function is particularly valuable for assessing moisture issues in our humid environment." - Ahmed K., Maintenance Supervisor

"As an electrical contractor working in industrial facilities, I need reliable tools that provide accurate readings every time. The UT513A has become my go-to insulation tester due to its consistent performance and versatility across different equipment types." - Joanna W., Master Electrician

"The 5kV test capability of the UT513A allows me to properly test medium voltage equipment according to IEEE standards. The analog bar graph is particularly helpful when looking for insulation trends during the test period." - Tomas R., Power Systems Engineer

Warranty and Support

UNI-T provides a comprehensive 12-month warranty on the UT513A insulation resistance tester, covering manufacturing defects and component failures under normal use conditions. Our global technical support team is available to assist with operation questions, application guidance, and troubleshooting to ensure you get the most from your investment.

Take Your Electrical Testing to the Next Level

The UNI-T UT513A 5kV Insulation Resistance Tester delivers professional-grade performance, reliability, and safety features at a price point that provides exceptional value. Whether you're implementing preventive maintenance programs, commissioning new equipment, or troubleshooting electrical issues, the UT513A provides the accuracy and versatility you need to make informed decisions about your electrical assets.

Order your UNI-T UT513A today and experience the perfect combination of performance and value in insulation testing.