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…
5 Key Steps to Perform a 30 Day Electrical Load Study
Why Load Studies Matter in Electrical Systems When adding new loads to an existing electrical service or feeder system, the first question is: can the system handle the additional demand? Overloading conductors, feeders, or switchgear can lead to equipment failures, safety hazards, and costly downtime. A 30-day load study provides a detailed profile of your system’s demand over time, allowing you to evaluate peak loads, compare phase balance, and verify capacity before adding new equipment….
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…
Digital Voltage Phasing Meter Part 1 – Potential Testing, URD Cable Testing
0-40KV Digital Volt Meter for Phasing Circuits The Hastings 6702 Digital Voltage Phasing Meter consists of high voltage resistors encapsulated inside two fiberglass housings. These resistors are connected together with a coiled cord. A digital display is attached to one of the encapsulated resistor housings. Attach each encapsulated resistor to a hot stick of appropriate length for the voltages to be tested. Measures overhead and underground voltages, Potential Testing and URD Cable Testing. Circuit Potential…
Is My AC Rotor Bad?
Can I Rule it In or Out as the Cause of Failure? Rotor bar problems are infrequent, in most applications. But, when they occur, they are easy to overlook. A lot of time is wasted on diagnosis when a rotor bar issue is not obvious. The guesswork about rotor bars being good or bad can easily and quickly be eliminated for a motor that can run. There are about 15 different ways to check for fractured…
Transformer Testing with a Megger DLRO10HD
Avoid Unexpected Outages with Regular Testing Regular testing of transformers can help identify problems that reduce system performance and can lead to unexpected outages. The dc resistance of a transformer winding can indicate the internal temperature of the winding when the resistance at ambient is compared to the hot resistance. The ideal test method is to make resistance readings at one minute intervals as the hot winding is cooling, using a
