Kyoritsu KEW 3128 High Voltage Insulation Testers

The Kyoritsu 3128 is a CAT IV high-voltage digital insulation tester capable of testing insulation resistance up to 35 TΩ at a test voltage of up to 12 kV. The Kyoritsu 3128 is IP64 certified for field use and features a large backlit LCD display.

(2 customer reviews)

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Kyoritsu KEW 3128 High Voltage Insulation Testers

The Kyoritsu KEW 3128 is a high voltage insulation tester that is modern and efficient. It is designed for accurate measurements of high voltage insulators. This gadget provides precise testing and measuring of various insulators at high voltage levels due to its excellent precision and unique capabilities. Users may perform tests and monitor insulation effectiveness in a variety of contexts thanks to the user-friendly design and easy accessibility.

KEW 3128 Features

  • Microprocessor-controlled high-voltage insulation resistance meter with diagnostic functions.
  • Suitable for analyzing the insulation characteristics of cables, transformers, motors, generators, high-pressure switches, insulators, wiring systems, etc.
  • 6 ranges: 500 V, 1000 V, 2500 V, 5000 V, 10000 V, 12000 V
    Fine adjustment of voltage in each range is also possible
  • Graphical display of insulation resistance and leakage current versus time on a large bar graph display with backlight.
  • Can be powered by a built-in rechargeable battery or by AC.
  • Automatic discharge after test with monitoring of discharge voltage.
  • Internal memory can store approximately 43,000 data (max).
  • Rugged design for field use with IP64 protection (when the lid is closed).

High Voltage Insulation Testers Kyoritsu KEW 3128 Specifications:

Voltage Measurement

  • Measuring Range:DCV:±30 to ±600 V, ACV:30 to 600 V(50/60 Hz)
  • Accuracy: ±2%rdg±3dgt

Current Measurement

  • Measuring Range:5.00nA – 2.40mA (Depending on the insulation resistance)

Capacitance Measurement

  • Measuring Range: 5.0nF to 50.0μF (500V/1000V/2500V/5000V),5.0nF to 1.0µF (display range: 5.0nF – 50.0µF) (10000V/12000V)
  • Accuracy:±5%rdg±5dgt


  • Applicable Standards: IEC 61010-1 CAT IV 600V Pollution degree 2, IEC 61010-031, IEC 61326, IEC 60529 (IP64): with the lid closed.
  • Power Source: Rechargeable 12V Lead Storage Battery
  • Dimensions:13 x 16.1 x 7.1″ (330 × 410 × 180 mm) (Instrument and Hard Case)
  • Weight:19.8 lb (9 kg) approx. (including battery) (Instrument and Hard Case)
2 reviews

2 reviews for Kyoritsu KEW 3128 High Voltage Insulation Testers

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  1. Jonathan

    It’s Great

  2. stephen

    high-quality product

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Kyoritsu Corporation Since its founding in 1940, Kyoritsu has made customer satisfaction and providing high quality products and services their top priorities. State of the art electrical measurement technology products are the backbone of their company's business. Kyoritsu's wide line of testers has contributed to technological developments and industrial infrastructures worldwide.


Data Sheet