Upgraded replacement for Upgraded replacement for model 3025A.

Kyoritsu KEW 3125B High Voltage Insulation Resistance Tester – 5kV, USB, CAT IV

The KEW 3125B is a powerful 5kV insulation resistance tester designed for professionals who demand reliable performance in high-voltage environments. It combines fast measurement, modern safety features, and a USB interface for easy data transfer—everything needed for industrial, utility, and commissioning work.

What it does:

• Measures insulation resistance up to 1 TΩ with selectable test voltages (500V to 5kV)

• Provides reliable results for cables, transformers, motors, and switchgear

• Includes USB communication for logging and reporting

Who it's for:

• Electrical contractors

• Industrial maintenance teams

• Utility and commissioning engineers

• Anyone upgrading from KEW 3025A

Why it's better:

• Improved measurement accuracy

• Modern safety design (CAT IV 600V)

• Auto-discharge and timer functions

• USB output standard

• Enhanced screen readability and faster response

✅ Technical Specifications:

• Test Voltages: 500V / 1000V / 2500V / 5000V

• Insulation Resistance Range: 0.01 MΩ to 1 TΩ

• Short-Circuit Current: 1.5 mA max

• Display: Dual digital with bar graph

• Power Supply: Rechargeable battery or AC adapter

• Safety Rating: IEC 61010-1 CAT IV 600V

• Data Output: USB

• Accessories: Test leads, alligator clips, carrying case, USB cable

Full specifications and manuals available from the manufacturer:
Kyoritsu KEW 3205B on KEW Japan website (in English)