Kyoritsu KEW 3125B Digital High Voltage Insulation Tester (5 kV)
April 22, 2026
Professional 5 kV Insulation Testing
The KEW 3125B is a digital high-voltage insulation tester designed for demanding industrial and utility applications. With test voltages up to 5000 V and insulation resistance measurement up to 1 TΩ, it delivers the accuracy and safety professionals need when working with large motors, switchgear, cables, and transformers.
Who It’s For
Engineers, maintenance teams, and utility technicians who require reliable high-voltage insulation resistance testing for compliance, commissioning, and preventative maintenance.
Why Choose the KEW 3125B
Unlike general-purpose insulation testers, the KEW 3125B provides extended voltage ranges (250 V to 5 kV) and extremely high resistance measurement capacity, all in a rugged portable unit. Its automatic discharge function, large backlit display, and intuitive controls make it both safe and efficient in the field.
Key Features
- Test voltages: 250 V / 500 V / 1000 V / 2500 V / 5000 V
- Insulation resistance up to 1 TΩ (teraohm)
- Auto-discharge after insulation test for safety
- Large backlit digital display for easy readability
- Timer function for timed insulation tests
- Rugged, portable design with shoulder strap
