Insulation Testers

Insulation testers are the ideal tool for preventative or predictive maintenance programs designed to identify potential equipment failures before they occur. They are perfect for testing a wide range of high voltage equipment including switchgear, motors, generators and cables.

Ideally all electrical current sent along a conductive wire should reach its intended destination. However you do find that some of it is lost along the way due to various reasons. Wires are insulated with a resistant sheathing to contain the conductivity of the typically copper or aluminium core, but even with this insulation in place, some of the current still manages to escape. The electricity that leaks out can be detrimental to electrical circuits and machinery. Testing can help you determine whether the insulation is performing at an effective and safe level. Excessive heat or cold, moisture, vibration, dirt, oil and corrosive vapours can all contribute to deterioration therefore routine testing can identify problems before they result in injury or equipment failure.

Testing the integrity of insulation requires measuring its resistance to current flow across it. A high level of resistance means that very little current is escaping through the insulation. Conversely, a low level of resistance indicates a significant amount of current may be leaking through and along the insulation.

What is the purpose of insulation testing?

A quality control measure at the time a piece of electrical equipment is produced.
An installation requirement to help ensure specifications are met and to verify proper hook-up
A periodic preventive maintenance task
A troubleshooting tool

Insulation testers provide noise free, reliable results. They are safe and easy to use and the ideal solution for troubleshooting, commissioning and preventative maintenance applications.

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Description Price Tester Type Minimum Test Voltage Maximum Test Voltage Maximum Insulation Resistance Measurement Display Type Calibrated Test Current Battery Life Minimum Operating Temperature Maximum Operating Temperature Power Source Safety Category Level Safety Category Voltage Safety Category
RS stock no. 794-3254
Mfr. Part No.93530-D
R 8,785.32
Each
units
Insulation Tester 100V 1000V 999kΩ LCD - 1mA - - - Battery CAT III 600V CAT III 600V
RS stock no. 914-2881
Mfr. Part No.P01140832
R 12,614.14
Each
units
Insulation & Continuity Tester 50V 100V 20GΩ Backlit LCD - 20mA, 200 mA 3000 Measurements, 6000 Measurements -20°C +55°C Battery CAT IV 600V CAT IV 600V
RS stock no. 175-7821
Mfr. Part No.FLUKE-1550C FC w/IR3000
BrandFluke
R 76,132.32
Each
units
Insulation Tester 250V 5000V 1TΩ LCD - 1 nA → 2 mA 750 Tests -20°C +50°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS stock no. 820-2976
Mfr. Part No.U1461A
R 21,820.08
Each
units
Insulation Tester 50V 1000V 260GΩ OLED - 1mA 160 h -40°C +55°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS stock no. 820-2970
Mfr. Part No.U1452AT
R 14,732.40
Each
units
Insulation Tester 50V 100V 66GΩ OLED - 1mA 270 h -20°C +55°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS stock no. 379-472
Mfr. Part No.IN2102
BrandMartindale
R 7,619.40
Each
units
Insulation & Continuity Tester 250V 1000V 5GΩ LCD - 200mA - 0°C +40°C Battery CAT III 600V CAT III 600V
RS stock no. 177-4976
BrandRS PRO
R 4,316.81
1 Kit
Kit(s)
Insulation Tester - 1000V 40MΩ LCD - 0.35mA - +5°C +40°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS stock no. 187-9915
Mfr. Part No.47339611
BrandSocomec
R 42,217.07
Each
units
Insulation Tester - - - LCD - - - -10°C +55°C - - - -
RS stock no. 379-476
Mfr. Part No.IN2101
BrandMartindale
R 6,710.70
Each
units
Insulation & Continuity Tester - 500V 1GΩ LCD - 200mA - 0°C +40°C Battery CAT III 600V CAT III 600V
RS stock no. 175-7819
Mfr. Part No.FLUKE-1555 FC Kit w/IR3000
BrandFluke
R 91,969.68
Each
units
Insulation Tester 250V 10000V 2TΩ LCD - 1 nA → 2 mA 750 Tests -20°C +50°C Battery CAT III, CAT IV 600 V, 1000 V CAT III 1000 V, CAT IV 600V
RS stock no. 471-3306
Mfr. Part No.DT-500
BrandCatu
R 7,641.71
Each
units
Insulation Tester - 500V dc 1MΩ Analogue - 1mA - - - Battery - - -