UNI-T UT513C Advanced Insulation Resistance Tester 5 kV, 5 T

The UT513C is the flagship of the UT513 series, delivering the widest insulation resistance range in the family up to 5 T making it the right tool for high-resistance modern insulation on large transformers, long cable runs, and heavy industrial machinery. Five selectable test voltages (250 V, 500 V, 1000 V, 2500 V, and 5000 V) give you precise control across a broad range of applications, from switchgear acceptance testing to medium-voltage feeder systems. Built-in capacitance measurement from 0.01 µF to 15 µF adds valuable context alongside resistance readings.

The full diagnostic suite includes Polarization Index, Dielectric Absorption Ratio, a 0s99m 59s measurement timer, and 10% stepped-voltage profiling to catch marginal insulation that a fixed reading might miss. Live leakage-current display, automatic discharge, and a high-voltage alarm keep field work safe at 5 kV. Results are stored in 999 sets and transferred via USB or a Bluetooth app for live readout and report capture. Rated CAT IV 600 V and powered by a rechargeable 14.8 V 5200 mAh Li-ion battery, the UT513C is built for full days on demanding industrial and utility equipment.