UNI-T UT513B 5kV Digital Insulation Resistance Tester with Advanced Measurement Technology

Overview

The UNI-T UT513B is a professional-grade 5kV digital insulation resistance tester engineered for electrical engineers, maintenance professionals, and contractors who demand precise measurements and comprehensive diagnostics for high-voltage equipment. With its innovative dot matrix display and measurement capability up to 2TΩ, the UT513B represents a significant advancement in portable insulation testing technology.

Featuring multi-voltage testing capabilities, advanced timing functions, and integrated analysis tools like PI and DAR measurements, the UT513B delivers laboratory-grade precision in a field-ready instrument. The rechargeable lithium battery provides extended operation for comprehensive testing sessions, while the CAT IV 600V safety rating ensures maximum protection in industrial environments.

Whether you're testing motors, transformers, cables, or switchgear, the UNI-T UT513B combines powerful diagnostic capabilities with user-friendly operation to streamline your testing process and provide the insights needed for confident decision-making about critical electrical systems.

Key Features

• High-voltage output up to 5kV with precise control
• Ultra-wide insulation resistance measurement range up to 2TΩ
• Selectable test voltages: 250V, 500V, 1000V, 2500V, and 5000V
• Dot matrix LCD screen for enhanced data visualization
• PI (Polarization Index) and DAR (Dielectric Absorption Ratio) testing capabilities
• Automatic leakage current display during measurements
• 10% stepping voltage function for detailed insulation profiling
• Timer measurement for standardized testing protocols
• Comparison function for quick pass/fail assessment
• Extensive data storage for 999 measurement sets
• USB interface for PC data transfer and analysis
• Automatic discharge function for safety after testing
• High voltage output alarm with visual indicator
• 14.8V 5200mAh rechargeable lithium battery
• CAT IV 600V safety rating for industrial environments

UNI-T UT513B Details

State-of-the-Art Measurement Technology

The UT513B features advanced measurement circuitry that delivers exceptional accuracy across its entire measurement range. With insulation resistance testing capability up to 2TΩ, this instrument easily handles the most demanding industrial applications, including high-voltage transformers, long cable runs, and precision electronic equipment. The 10% stepping voltage function allows for detailed insulation stress testing, revealing potential weaknesses that standard fixed-voltage tests might miss and providing a comprehensive profile of insulation behavior under varying voltage conditions.

Intelligent Diagnostics and Analysis

Beyond basic insulation resistance measurements, the UT513B performs sophisticated time-based analysis through its PI and DAR functions. These critical measurements reveal insulation degradation, moisture ingress, and contamination that might not be apparent from standard resistance readings. The tester's comparison function allows setting of threshold values for quick pass/fail assessment, streamlining testing procedures and ensuring consistent evaluation standards across multiple equipment points or testing personnel.

Advanced User Interface

The UT513B's dot matrix display represents a significant upgrade over traditional segment LCDs, providing clearer readings and enhanced data visualization capabilities. Multiple measurements can be displayed simultaneously, showing both primary test values and supporting data like leakage current and test duration. The intuitive menu system puts all functions within easy reach, while the logical control layout ensures efficient operation even when wearing protective equipment. The backlit screen ensures perfect visibility in all lighting conditions, from bright outdoor sun to dimly lit equipment rooms.

Industrial-Grade Reliability

Designed for demanding field applications, the UT513B features robust construction that withstands the rigors of daily professional use. The high-capacity 14.8V 5200mAh lithium battery provides extended operation for comprehensive testing sessions without frequent recharging, while the instrument's internal design protects sensitive electronics from dust, humidity, and electromagnetic interference commonly encountered in industrial environments. The CAT IV 600V safety rating ensures maximum protection when working on industrial distribution systems or outdoor utility equipment.

Professional Applications

Electric Power Generation and Distribution

Power engineers rely on the UT513B for comprehensive testing of transformers, generators, switchgear, and cable systems. The 5kV test capability meets industry standards for medium-voltage equipment, while the 2TΩ measurement range accommodates modern high-resistance insulation materials. The data storage and USB interface facilitate detailed documentation for regulatory compliance and asset management programs.

Industrial Maintenance

Maintenance professionals implement the UT513B in preventive maintenance programs for motors, drives, and critical electrical infrastructure. The PI and DAR functions provide early warning of insulation degradation before catastrophic failures occur, allowing planned interventions that minimize production downtime. The comparison function enables quick verification against established baseline values, streamlining routine inspection procedures.

Oil and Gas Facilities

Technicians in hazardous environments depend on the UT513B's CAT IV safety rating and comprehensive testing capabilities when maintaining electrical systems in oil and gas facilities. The instrument's ability to detect moisture ingress and contamination through PI/DAR measurements is particularly valuable in these demanding operating conditions, where insulation integrity is critical for both operational reliability and safety.

Telecommunications and Data Centers

Infrastructure specialists use the UT513B to verify insulation integrity in mission-critical power systems supporting telecommunications networks and data centers. The precision measurements and extensive data logging capabilities provide documentation for certification procedures and change management protocols, ensuring compliance with stringent uptime requirements.

Technical Specifications

Package Contents

• UNI-T UT513B Insulation Resistance Tester
• Test leads (red, black, green: 1 for each)
• USB cable
• 14.8V 5200mAh lithium battery pack
• Lithium battery charger
• Carrying strap
• English user manual
• Hard carrying case
• Test certificate

UNI-T Insulation Tester Comparison Table

FAQ

What advantages does the lithium battery provide over alkaline batteries?

The 14.8V 5200mAh rechargeable lithium battery offers several advantages over traditional alkaline batteries. It provides longer continuous operation, allowing for extensive testing sessions without interruption. The lithium battery maintains consistent output voltage throughout its discharge cycle, ensuring measurement accuracy even when battery charge is low. Additionally, the rechargeable design reduces operating costs and environmental impact over time compared to disposable alkaline batteries.

How does the UT513B compare to leading competitors in the same class?

When compared to similar 5kV insulation testers like the ETCR 3500 or Fluke 1550C, the UNI-T UT513B offers competitive features at a significantly lower price point. The UT513B matches or exceeds competitors in key areas like measurement range (up to 2TΩ), data storage capacity (999 sets), and safety ratings (CAT IV 600V). While premium brands may offer additional specialized features, the UT513B delivers the core functionality and accuracy that most professionals require for daily insulation testing tasks.

Can the UT513B be used for testing rotating machinery?

Yes, the UT513B is ideal for testing motors, generators, and other rotating machinery. Its PI and DAR functions are particularly valuable for assessing winding insulation quality, detecting moisture ingress, and identifying potential issues before they cause operational failures. The multiple test voltage options allow for testing various motor types according to manufacturer specifications and industry standards.

Customer Testimonials

"The UT513B has transformed our preventive maintenance program. We used to outsource annual insulation testing, but having this capability in-house has saved us thousands while allowing more frequent monitoring of critical equipment." - Elena M., Manufacturing Facility Manager

"As an electrical contractor specializing in industrial installations, I need reliable tools that won't let me down on big projects. The UT513B's lithium battery lasts through multiple days of commissioning work, and the 999-set memory means I can document everything for client reports without constant data transfers." - Carlos D., Industrial Electrical Contractor

"The comparison feature on the UT513B has standardized how our team evaluates insulation. We've established threshold values for different equipment classes, and now our maintenance decisions are based on consistent criteria rather than individual judgment." - Wei L., Power Plant Maintenance Supervisor

Warranty and Support

UNI-T provides a comprehensive 12-month warranty on the UT513B 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 maximum value from your investment.

Elevate Your Electrical Testing Capabilities

The UNI-T UT513B represents the perfect balance of advanced technology, user-friendly operation, and industrial durability. Its comprehensive measurement capabilities, extended battery life, and robust data management features make it an essential tool for professionals responsible for maintaining critical electrical systems and ensuring operational reliability.

Whether you're implementing a preventive maintenance program, commissioning new equipment, or troubleshooting insulation failures, the UT513B provides the accuracy, versatility, and reliability you need to make informed decisions about your electrical assets.

Order your UNI-T UT513B today and experience professional-grade insulation testing with confidence.