Amprobe AMB-55 Industrial High-Voltage Insulation Tester

(1 customer review)

  • Test insulation of wires, cables, transformers, motors, surge arrestors and generators
  • Selectable testing voltages – one testing instrument for low and high voltage systems from 250 V to 5000 V with 25 V increments
  • Insulation resistance measurement up to 10TΩ
    • R(t) graph – Real time resistance against time graph plotting facility to graphically illustrate the response of a material to an applied test voltage
    • User selectable Programmable Timer (1s to 99 min)
    • Automatic discharge of test object after completion of measurement
    • Capacitance Measurement
  • Diagnostic tools
    • Polarization index (PI)
    • Dielectric discharge (DD)
    • Dielectric Absorption Ratio (DAR) with automated resistance ranging (AR)
  • Step voltage test – Insulation resistance will be measured at five different, equality sequenced test voltages for in-depth insulation system diagnostic
SKU: 3730320 Category:


Eliminate downtime, predict the lifetime of equipment and reduce safety hazards with the Amprobe AMB-55 Insulation Resistance Tester that tests voltage and step voltage to 5,500 V.

You can accurately test cables, transformers, motors, surge arrestors and generators in noisy environments such as high voltage switchyards. It also boasts built-in noise rejection filters and shielded test leads to provide high EMI immunity.

Additional information



Insulation resistance 0 O → 999 kO, 1.00 O → 9.99 MO, 10.0 MO → 100.0 MO, 1.00 O- 9.99 GO
Test voltage and step voltage display range 0 V → 5500 V
Current display range 0.00 nA → 9.99 nA, 10.0 nA → 99.9 nA, 100 nA → 999 nA, 1.00 µA → 9.99 µA, 10.0 µA → 99.9 µA, 100 µA → 999 µA, 1.00 mA → 5.50 mA
Dielectric absorption ratio (DAR) 0.01 → 100.0
Polarization index (PI) 0 → 100.0
Dielectric discharge test (DD) 0 → 100.0
Leakage current display range 0 mA → 5.50 mA
External voltage measurement 0 V → 600 V
Capacitance measurement 0 nF → 99.9 nF, 100 nF → 999 nF, 1 µF → 50.0 µF
Download PC interface
Memory size 128 kB


High Voltage Insulation Resistance Tester

Don’t be caught off guard by deteriorating electrical insulation with AMB high voltage resistance testers.

What’s Included

  • AMB-55
  • Test lead
  • Large jaw alligator clips
  • Batteries
  • Carrying case
  • Software
  • RS-232 cable
  • USB cable


Datasheet »
Product Manual »

1 review for Amprobe AMB-55 Industrial High-Voltage Insulation Tester

  1. Lombard

    Nice unit but unreliable

    I bought this units, the specs are very nice, I love the shielded cables, but after a few months the pushbuttons began to fail, now the unit is not even generating high voltage and warranty just expired, heard that several users have the same problem, avoid this and the 10 KV unit

    ✘ No, I do not recommend this product

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