ETCR 3520B 10kV High Voltage Insulation Tester Megohm Meter 20T 7mA electrical system tool

10 kV Insulation Tester for High-Voltage Assets

The ETCR 3520B is a new high-voltage insulation tester built for 10 kV test voltage. It measures insulation resistance, polarisation index, dielectric absorption ratio, step voltage, ramp voltage, dielectric discharge index, distributed capacitance and AC/DC voltage. A colour touchscreen shows live data and history records on one display. Strong anti-interference technology keeps readings stable on long cables and in substation environments.

Suits Preventive Maintenance on Large Plant

This instrument fits engineers who run scheduled insulation checks on cables, motors, transformers and switchgear in high-capacity, high-inductive settings. Custom test-voltage, duration and PI/DAR formulas adapt to site-specific procedures. Automatic voltage monitoring blocks testing above 36 V to protect the operator and the unit. Automatic discharge removes stored charge after each test without external gear. Buyers needing only basic low-voltage continuity checks should look at simpler multimeters.

10 kV Test Voltage Decides the Application

The single figure that determines suitability is the 10 kV maximum test voltage. It qualifies the tester for medium- and high-voltage apparatus but rules it out for low-voltage control wiring or extra-high-voltage transmission lines. The 20 T model number and 7 mA short-circuit current support the same high-energy testing envelope. Match this rating to the insulation class of the equipment under test.