Log in Registration Where to buy Contact us International English Products Applications Company Support Events Webinars Products Insulation testing AC insulation testing AC insulation testing High-precision C and DF measurement instrument CDAX 605 12 kV insulation diagnostic system DELTA4000 Series 100 kV 50 Hz test system HPA 100/110/120 AC and 130 DC AC HV test sets HPG35, HPG50, HPG58 and HPG78 DC and AC HV test system HPG50-D, HPG70-D and HPG80-D DC and AC HV test system HPG50-H, HPG70-H, HPG80-H and HPG110-H Insulation diagnostic analyser IDAX300 and IDAX350 INSULATION DIAGNOSTIC ANALYSER BASED ON HV DIELECTRIC FREQUENCY RESPONSE (DFR) IDAX322 Capacitance range extender Resonating inductor A.C. high voltage test system T22/1 High potential tester (Hipot) T22/13B 2 kV high voltage amplifier for IDAX300 VAX020 AC insulation tests are a popular response to the increasingly demanding industrial, power and domestic marketplaces. Insulation materials have had to become more efficient to keep up with demand; more efficient equipment requires less insulation material to meet the minimum acceptable value of insulation resistance. In turn, cables have become smaller and lighter. However, under certain higher stress testing conditions such as DC testing, cables like Crossed Linked Polyethylene (XLPE) can quickly degrade. AC insulation testing provides the ideal solution to testing these lighter cables. AC insulation testing better simulates the day-to-day stresses undergone by power systems, including frequencies like 50/60 Hz, without causing the insulation breakdown common in DC testing. Additionally, AC testing won’t affect XLPE cables when used for over-potential testing, to an agreed acceptable insulation resistance value. Because AC current alternates, many more parameters can be measured while an AC test is being conducted. These extra parameters include Power factor and Tan Delta values, as well as modern diagnostic techniques such as Sweep Frequency Response Analysis, Digital Frequency Response and Frequency Domain Spectroscopy. AC insulation testing may therefore be used in ‘condition monitoring’ of AC-powered apparatus. However, AC dielectric tests must supply both reactive and resistive currents to the items under test resulting in larger equipment in size than DC testing devices. Lower frequency AC testers can offer smaller sizes, making them more applicable to field work. POPULAR LINKS New in the technical library Upcoming Megger events Featured product videos Find a distributor Discover our product range ACCOUNT LINKS Login My account Service request Software downloads Product registration SITE LINKS Contact us Cookie policy Legal Modern Slavery Act Privacy policy Sitemap BRAND LINKS AVO Training Institute States Terminal Blocks and Test Switches SOCIAL LINKS Copyright © 2021 Megger, all rights reserved. We use cookies to provide you with a better experience. Read more on our cookie policy. Feedback