UNI-T UT513B 5kV Insulation Resistance Testers

UNI-T UT513B 5kV Insulation Resistance Testers

The UNI-T UT513B is a portable, battery-powered instrument engineered to measure insulation resistance up to 5 kV, providing technicians with a reliable means to verify the integrity of electrical assets. Housed in a rugged enclosure, the device incorporates a high-contrast, backlit LCD that displays real-time test values, leakage current, and a bar-graph representation of resistance. Upon powering on, users select one of five voltage ranges (250 V, 500 V, 1 kV, 2.5 kV, 5 kV) and adjust output in 10 % increments for fine control. During testing, the unit continuously monitors the object’s voltage, automatically discharging upon completion to ensure operator safety.

Internal storage can save up to 999 measurements, which are retrievable over USB. A built-in timer tracks test duration, while analog and digital indicators guide the user through functions such as polarization index (PI) and dielectric absorption ratio (DAR). The UT513B draws power from a 14.8 V, 5200 mAh lithium battery pack, granting approximately 15 minutes of continuous output per charge sufficient for most field inspections without AC power.

Integrated alarms warn of hazardous voltages exceeding 36 V, and the device supports resistance comparison with upper/lower limit settings. Designed for standalone operation, it combines data logging, self-discharge, and overload protection in a compact, ergonomically optimized chassis.

Features:

• Five selectable output voltages: 250 V, 500 V, 1 kV, 2.5 kV, 5 kV.
• Stepping adjustment at 10 % increments for each voltage range.
• Automatic leakage current display during tests.
• Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurement modes.
• Built-in timer with 0 s to 99 m 59 s range for timed tests.
• Resistance comparison function with pass/fail indication.
• Auto discharge of the tested object when the test ends.
• High-voltage warning alarm if residual voltage exceeds 36 V.
• Data storage for up to 999 test records.
• USB interface for data transfer to PC software.
• Rechargeable 14.8 V, 5200 mAh lithium battery pack (≈15 min runtime).
• Automatic power-off after 15 minutes of inactivity.
• Analog bar-graph display superimposed on digital readout.
• External voltage detection to prevent testing on live circuits.
• Overvoltage category rating: CAT IV 600 V.
• Backlit 5.1-inch LCD for clear visibility in low-light conditions.

Specifications:

Applications:

• Cable Insulation Resistance Testing.
• Motor Insulation Resistance Testing.
• Power Generator Insulation Testing.
• Transformer Insulation Testing.
• Mutual Inductor Insulation Testing.
• High-Voltage Switch Insulation Testing.
• Lightning Arrester Insulation Testing.
• Electric Power Industry Maintenance.
• Telecommunication System Maintenance.
• Meteorological Equipment Insulation Checks.
• Computer Room Insulation Monitoring.
• Oil Field Equipment Maintenance.
• Electromechanical Installation and Maintenance.
• Power Supply Department (Industrial & Mining).

Package Contents:

• 1x User Manual
• 1x High-Voltage Test Lead (Red)
• 1x High-Resistance Sampling Lead (Black)
• 1x Protective Test Lead (Green)
• 1x USB Cable
• 1x Lithium Battery Charger
• 1x Lithium Battery Pack (14.8 V, 5200 mAh)
• 1x Carrying Strap

UNI-T  UT513B Documents:

• Datasheet 
• User Manual