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Power Quality Advanced

Not scared of some good harmonics every now and then? Follow this category for the nitty-gritty details on how you can keep the world up and running!

Future proofing your Power Quality measurement equipment with IEC 61000-4-30 third edition

What is IEC 61000-4-30 standard? The IEC 61000-4-30 standard ensures that the measurement results from Power Quality analyzers and loggers of different makes and models match up; so measurement results are comparable without any doubts. This is extremely important, especially...

Five key test points to understand motor drive efficiency and performance

Motor drives are a well-known technology for transforming the constant voltage from the main ac power supply into a voltage that varies to control motor torque and speed ideal for motors that are driving mechanical equipment loads. Motor drives...

Find problems early by monitoring motor and drive efficiency

More than 40% of industrial motors work at or below 40% of their load rating. That means poor power factor and inefficient operation. Efficiency of all motors can drop over their lifetime, which increases energy and maintenance costs and...

The surest way to diagnose high-voltage surge arresters

Surge arresters play a key role in protecting electrical devices and equipment in high-voltage electrical substations. Like other devices, they must be periodically diagnosed. The most common method is visual inspection: checking that the arrester has no visible external...

Electrical Power Explained – Part 5: finding and curing wasted power

We've extracted these Electrical Power Explained blogs from our comprehensive Electrical Power Explained course. We'll now round off with a couple of examples that fill in some figures suggesting the scale of the problem. This can come from poor...

Electrical Power Explained – Part 4: Unbalanced three-phase AC power

In our last blog, we described how balanced three-phase AC systems act like three independent single-phase systems. There's no neutral current, and the total active and reactive powers are just the sum of the active and reactive phase powers....
three-phase AC power

Electrical Power Explained – Part 3: Balanced three-phase AC power

Large three-phase motors and the equipment they drive should consume power equally from each of the three mains phases. However, that often doesn’t happen. Unbalance and harmonics can cause instability, with motor vibration that reduces both efficiency and lifetime....

Electrical Power Explained – Part 2: Single-phase AC power

You need a thorough grounding in single-phase power before you can understand the three-phase supplies used in large industrial and commercial facilities. That means understanding the relationships between the sinewave voltage supplied by your utility and the resultant non-sinewave...
DC power

Electrical Power Explained – Part 1: Basic DC power

'Classical' electrical power theory is no longer enough 'Classical' electrical power theory is fine for describing simple resistive loads. It cannot, however, handle complex three-phase inductive systems that generate harmonic, unbalance and neutral-line powers. So, classical theory is no use...

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How to setup the 173x series energy logger

Most of us work in tech support departments and one of the most frequently asked questions we receive is: how to set up a energy...

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