UT513C 5kV Advanced Insulation Resistance Tester

The UT513C is the top of the UT513 line: CAT IV 600 V, test voltages from 250 V to 5 kV, and insulation resistance up to 5 TΩ — the widest range in the family, for high-resistance modern insulation on transformers, large machines, and long cable systems. It adds capacitance measurement from 0.01 µF to 15 µF and a Bluetooth app alongside USB.

It runs the full diagnostic set — Polarization Index, Dielectric Absorption Ratio, a 0 s–99 m 59 s timer, and 10%-of-range stepped-voltage profiling — with live leakage display, automatic discharge, and a high-voltage alarm. Results store 999 sets and move to phone or PC. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.

Key Features

• Five selectable test voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V
• Insulation resistance up to 5 TΩ, accuracy ±(5%+5)
• Capacitance measurement 0.01 µF to 15 µF
• PI and DAR timed diagnostics with 0 s–99 m 59 s timer
• 10%-of-range stepped-voltage profiling
• Live leakage-current display and automatic discharge
• High-voltage output alarm
• 999-set storage, USB and Bluetooth app
• CAT IV 600 V; 14.8 V 5200 mAh rechargeable Li-ion

UT513C Details

5 TΩ Measurement Range

The UT513C reads insulation resistance up to 5 TΩ — the widest in the UT513 family — so high-resistance modern insulation on large transformers and long cable runs stays on-scale where lower-range testers top out.

PI, DAR & Stepped-Voltage Profiling

The full timed-diagnostic set runs here: PI and DAR separate sound insulation from moisture and contamination, while 10% stepped-voltage profiling stresses the dielectric in stages to expose marginal insulation a fixed reading would pass.

Capacitance Measurement

Built-in capacitance measurement from 0.01 µF to 15 µF adds context to insulation work — useful for characterizing cable and winding capacitance alongside the resistance reading.

Bluetooth App & USB

Beyond on-board storage of 999 result sets, the UT513C pairs to a Bluetooth app for live readout and report capture in the field, with USB transfer to a PC for records.

Safety & Field Build

Automatic discharge and a high-voltage alarm handle the hazards of 5 kV testing; the CAT IV 600 V rating and a 14.8 V 5200 mAh rechargeable pack suit full days on industrial and utility equipment.

Compare the UT513 Series

Applications

High-resistance insulation testing on large transformers and machines; medium-voltage cable and feeder systems; switchgear maintenance and acceptance testing; and any program where capacitance and app-based documentation add value to the insulation record.

Frequently Asked Questions