Kyoritsu 3125A – 5kV Digital High-Voltage Insulation Resistance Tester (Up to 1 TΩ)

Professional-Grade Megohmmeter for High-Voltage Electrical Testing

The KEW 3125A is no longer available, replaced by KEW 3125B

Product Overview:
The Kyoritsu 3125A is a high-performance 5kV digital insulation resistance tester engineered for industrial and utility applications. With an insulation resistance range up to 1 TΩ (1 tera-ohm) and selectable test voltages from 250 V to 5000 V, this tester is ideal for checking insulation integrity in high-voltage equipment such as transformers, switchgear, cables, and rotating machinery.

Its large LCD with bar graph, built-in memory, and intuitive interface make the 3125A a top-tier instrument for electrical engineers and maintenance professionals conducting regular testing and commissioning in high-voltage environments.

Key Features:

• Test Voltages: 250 V, 500 V, 1000 V, 2500 V, 5000 V

• Insulation Resistance Range: Up to 1 TΩ (1000 GΩ)

• Auto Discharge Function for operator safety

• Dielectric Absorption Ratio (DAR) & Polarization Index (PI) testing

• Large Backlit Digital Display with Bar Graph

• Memory for Data Storage (up to 43 readings)

• Timer Function for Timed Insulation Tests

• Overload Protection on all ranges

• IEC 61010-1 CAT IV 600 V Safety Rated

Best For:

• High-voltage maintenance and commissioning

• Substation and power utility testing

• Transformer, motor, and generator insulation checks

• Industrial reliability and predictive maintenance programs

What's Included:

• Kyoritsu 3125A 5kV Insulation Tester

• High-voltage test leads and alligator clips

• Carrying case

• Instruction manual

• Batteries (installed)

🔍 How It Compares: