Kyoritsu KEW 3125B High Voltage Insulation Tester

Included Accessories:

The KEW 3125B comes with several essential accessories, including:

  • Line probe (3m)
  • Earth cord (3m)
  • Guard cord (3m)
  • Hook type prod
  • Carrying case (hard)
  • 8 LR14 alkaline batteries
SKU: 86038

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Kyoritsu KEW 3125B High Voltage Insulation Tester

The Kyoritsu KEW 3125B High Voltage Insulation Tester is a highly reliable tool designed for rigorous insulation testing in various electrical systems. This device is suitable for professionals needing accurate and comprehensive insulation resistance measurements.

This insulation tester is ideal for testing the insulation resistance in high-voltage electrical systems, making it suitable for use in power generation, distribution, and large industrial installations. to buy insulation resistance tester please contact us.

Kyoritsu KEW 3125B Key Features

  • Insulation Resistance up to 1TΩ
  • Short-Circuit Current up to 1.5mA
  • Wide Test Voltage from 250V to 5000V
  • Diagnosis Function of PI and DAR
  • Newly-designed alligator clip
  • It comes with a tough hard case
  • Filter function reduces noise interference for obtaining stable measurement
  • Large display with Bar Graph indication and backlight
  • Live voltage warning
  • Safety standard IEC 61010-1 CAT Ⅳ 300V / CAT Ⅲ 600V
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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.


Kyoritsu KEW 3125B Specifications

Test voltage 250V 500V 1000V 2500V 5000V
Measuring range 0.0 – 100.0MΩ 0.0 – 99.9MΩ
80 – 1000M Ω
0.0 – 99.9MΩ
80 – 999MΩ
0.80 – 2.00G  Ω
 0.0 – 99.9MΩ
80 – 999MΩ
0.80 – 9.99GΩ
8.0 – 100.0GΩ
0.0 – 99.9MΩ
80 – 999MΩ
0.80 – 9.99GΩ
8.0 – 99.9GΩ
80 – 1000GΩ
±5%rdg±3dgt ±5%rdg±3dgt ±5%rdg±3dgt ±5%rdg±3dgt ±5%rdg±3dgt
(100GΩ or more)
Short circuit current 1.5mA
Rated test current 0.7mA – 0.9mA at 0.25MΩ load 0.8mA – 1mA at 0.5MΩ load 1mA – 1.2mA at 1MΩ load 1mA – 1.2mA at 2.5MΩ load 1mA – 1.2mA at 5MΩ load
Open circuit voltage 250V

Voltage measurement

Measuring range AC: 30 – 600V (50/60Hz), DC: ±30 – ±600V
Accuracy ±2%rdg±3dgt


Applicable standards IEC 61010-1, 61010-2-030 CAT Ⅳ 300V / CAT Ⅲ 600V Pollution degree 2,
IEC 61010-031, IEC 61326-1, 2-2
Power source DC12V : LR14 × 8pcs
Dimension 177 (L) × 226 (W) × 100 (D) mm
300 (L) × 315 (W) × 125 (D) mm (Hard case)
Weight Approx. 1.9kg (including batteries)
Approx. 4kg (including accessories)
Accessories 7165A (Line probe: 3m),
7264 (Earth cord: 3m),
7265 (Guard cord: 3m),
8019 (Hook type prod),
9204 (Carrying case [Hard]),
LR14 (Alkaline battery size C) × 8,
Instruction manual
Optional Accessories 7168A (Line probe with alligator clip: 3m),
7253 (Longer line probe with alligator