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Recently Published Blogs

Does AC and DC Hipot Testing Cause Damage?

by Protec Tech Team June 18, 2018

Hipot testing is primarily performed to make sure that high voltage insulation will hold up during service. Many equipment and plant owners share concerns regarding the possibility for causing damage or premature deterioration of insulation by performing hipot testing on their assets.

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Questions About VLF Hipot Tests

by Protec Tech Team May 15, 2018

We find there are often plenty of questions from readers about the differences between VLF, AC and DC hipot testing methods. And of course, plenty of arguments surround whether DC testing should be performed or completely replaced by VLF testing. 

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Performance Testing with DC and VLF Hipots

by Protec Tech Team May 01, 2018

When it comes time to test substations or medium voltage insulation testing, both DC Hipot and VLF Hipot technologies are can be uniquely helpful in their applications. 

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Understanding the Applications of VLF and DC Hipots

by Protec Tech Team May 01, 2018

Hipot testing is a stress test to determine the reliability of insulators and helps identify bad components. There are different high potential testing technologies available and it is important to understand the proper use of each. Using the wrong method can degrade or even cause an electrical component to fail.

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Proper Hipot Tests for Field-Aged and New Cables

by Protec Tech Team May 01, 2018


High potential testing is conducted to determine if the cables can withstand  normal operating voltages as well as over voltage conditions. There are specific tests suitable for field-aged cables as well as for newly installed cables. It is important to conduct the appropriate test in order to obtain as much information regarding the electrical health of the insulation without imposing detrimental effects in the process. Improper testing can lead to unexpected expenses and delays.

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What to Consider in DC Hipot Testing

by Protec Tech Team April 30, 2018

Ensuring electrical safety is a major aim of any electrical maintenance personnel. That is why when installing new cables, electrical testing should be carried out first. This testing is a quality control measure to ensure that only good cables will be used in the power facility.

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Rent the High Voltage VLF-65E for Safe and Reliable for Testing

by Protec Tech Team November 17, 2017

It is always recommended that electrical equipment be checked for problems even if it seems to be working fine, as electrical stress, normal weathering and contaminants can cause insulators to lose resistivity.

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AC Hipots and VLF AC Hipots Part of Protec's Rental Equipment Catalog

by Protec Tech Team July 06, 2017

Offered in either power frequency (50/60 Hz) or Very Low Frequency (VLF) models, AC hipots are capable of testing multiple types of substation apparatus, such as; motors/generators, isophase bus, and other loads requiring an AC withstand test.

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Now Part of Protec's AC Hipot Rental Inventory, High Voltage PFT-652CM

by Protec Tech Team January 10, 2017

The High Voltage PFT-652CM 65kV 2kVA AC Hipot is a Dielectric Test Set that provides continuously adjustable AC voltage.Contact Us Now

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Rent the HV Diagnostics TD90-MC Tan Delta System from Protec Today

by Protec Tech Team July 28, 2016

The HV Diagnostics TD90-MC 90kV Portable Tan Delta Measurement System is an easy to use, single piece, Digital Signal Processor based, field portable, fully automatic VLF (Very Low Frequency) high voltage measurement instrument developed for the high potential measuring of the insulation dielectrics of various types of electrical apparatus.

The HV Diagnostics TD90-MC is a versatile high voltage tan delta measuring system suitable for testing medium voltage electrical insulation systems such as cables (including: XLPE, PE, EPR, PILC etc.), capacitors, switchgear, transformers, rotating machines, insulators and bushings.

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HV Diagnostics HVA90 Now Available for Rent from Protec

by Protec Tech Team June 15, 2016

The HV Diagnostics HVA90 90kV VLF / DC High Voltage Test Instrument features the ability to test MV and Sub Transmission class cables including 69kV cable and below. The HV Diagnostics HVA90 not only produces some of the highest VLF AC voltages available, but it also has a very powerful output capability, facilitating the testing of long cables.

Setup of the HVA90 is simple and automatic with no cumbersome interconnecting of various modules. Automatic test sequences can be setup directly on the instrument or on the supplied HVA Control Center software, and test reports are downloaded to the instrument’s internal memory or to a USB flash drive.

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Rent the SKF (Baker) Static Motor Analyzer AWA-IV/12 from Protec

by Protec Tech Team March 22, 2016

Weak motor insulation often degrades to the point of causing premature and unexpected motor failure, which in turn can result in costly unplanned downtime of production machinery. The SKF (Baker) 12kV Static Motor Analyzer AWA-IV/12 is a fully-automated motor analyzer that automatically performs repeatable, user-programmable tests to thoroughly assess the strength of a motor’s insulation and circuit. The SKF AWA-IV/12 also used to assure quality of motor rebuilds or new production motors before they are placed into service.

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Protec Equipment Resources Inc.
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Suite 116
Grand Prairie, Texas 75050

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