5 Steps to Test Insulation Resistance in Failed Motors

Facilities that use a run-to-fail maintenance approach have added pressure to bring motors and other systems back up and running as quickly as possible. Every minute a motor is down has a costly effect on the company. Suddenly, troubleshooting a failed motor becomes an emergency. Not all facilities have on-staff resources to perform preventive maintenance on their motors. Many rely on outside experts to rescue them when motors fail. And while preventive and predictive maintenance…

Dirty Power Quality

Is dirty power dirtying your profits? In today’s manufacturing facilities, it is extremely common to find that there are large amounts of machinery that depends on high quality, clean electrical energy to keep it operating. Plant managers and technicians are often tasked with making sure this machinery is running at optimum levels to keep operating costs down. Wasted energy, downed machinery and dirty power can suck up your profits almost instantly. There is a very…

Common Power Quality Issues

Often times when dealing with a power logger or power analyzer you will see a waveform trend and maybe not be the most informed on what exactly it means. Below are the most common waveform patterns and a quick run down of what they mean as well as common causes and results of the waveform. JM Test is an authorized distributor of Fluke power analyzers and loggers. If you would like to rent or…

Choosing the Right Ground Resistance Tester

There are a wide variety of ground resistance testers available on them market today. These vary in design, features, and complexity, and include small handheld models as well as larger field instruments that are often packaged as part of a complete kit. These products also range in price, from few hundred up to several thousand dollars. In this article, we discuss several critical questions to consider when selecting a ground…

5 Key Steps to Perform a 30-day Load Study with Fluke Power and Energy

When adding new loads to an existing electrical service or set of feeders, the first thing to determine is whether the existing system is capable of supporting the new loads. In other words, what is the highest load the system carries? What you need to know To determine existing equipment capacity, factor in the incoming conductor size, the ratings of the equipment, and space for new circuits. To determine present loading, you’ll need to either precisely…

Digital Voltage Phasing Meter Part 2 – Phasing a Distribution Circuit

Digital Meter Provides Better Accuracy Use the Hastings 6702 Digital Voltage Phase Meter to make sure you have voltage on both sides of power line switches/cutout fuses and check all the phases.  With the digital readout you see the small differences in the voltage reading.  Both sides of the cutout fuses should read zero volts but could possibly show 200-400 volt fluctuations. HIpot Underground Cable The purpose of hipoting underground cable is to…