Skip to content

High Current Low Resistance Testing with a 100A DLRO

Vanguard Auto-Ohm100A 10 ampere Digital Low Resistance Ohmmeter is sufficient for many low resistance measurement applications. However, industry standards and guidelines will recommend, if not require a minimum of a 100 amps DC source when evaluating connections relating to medium and high voltage power system apparatus. Very small changes in contact resistance can have significant impacts on these apparatus in terms of how they perform in service.  The use of higher current helps in the precision of the measurement and is therefore preferred when evaluating connections in higher voltage applications.

Contact Us Now

One of the most commonly used high current digital low resistance Ohmmeters is the Vanguard Auto-Ohm 100 100A Micro-Ohmmeter. This test set features a resistance range of 1 micro-Ohms to 300 milli-Ohms. Its output current can be adjusted from 10 amperes to 100 amperes depending on the application. A selectable current output makes this test instrument ideal for measurements in a much broader range of applications. Its powerful microprocessor gives you fast and accurate results. It has an automatic mode which makes it ideal for testing multiple resistances in a circuit breaker. Results can be directly taken from its back-lit LCD screen which is viewable even in bright conditions. You also have the option to change test leads to accommodate varying sizes of components to be tested.

The Vanguard Auto-Ohm 100 is available for rent from Protec. Choose from a wide range of Vanguard test equipment and other high voltage test equipment from popular brands. 

Related electrical test equipment available for rent from Protec:

AEMC 6250 10A Micro-Ohmmeter

Megger DLRO600 600A Digital Microhmmeter

Raytech Micro Junior 10A Precision Micro Ohm Meter

This electrical test equipment is available for rent, lease, or purchase from Protec Equipment Resources. We are here to help you with your testing equipment needs.

Wherever the job takes you (and the equipment), with Protec’s multiple locations, we always ship from the office closest to your desired drop location (if the electrical test equipment you need is in-stock at that location), and the equipment can be returned to the nearest office.

We always consider ALL shipping options in order to save you the most time and money.

Also, if you happen to be close to one of our many office locations, walk-ins are always welcome!

Rely on the Electrical Test Equipment Rental Experts, we are there when and where you need us.

Visit Our Website

Editor’s Note: This post was originally published March, 2011 and has been updated freshness, accuracy and comprehensiveness.