ABB has produced a range of technical guides that offer concise explanations of the major technologies and technical issues in low voltage AC drives. ...

Collection of links to various places with useful motor information. I’ll try and return to the page every now and again to update it with any motor notes...

One of the requirements to ensuring that everything works is to have equipment selected, manufactured and verified [tested] to IEC standards. Not all equipment...

Photovoltaic (PV) systems are typically more efficient when connected in parallel with a main power gird. During periods when the PV system generates energy...

Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...

In three phase systems, the use of transformers with three windings (or legs) per side is common.  These three windings are often connected in delta or...

This is the first of two posts on the resistance of conductors. In the next post I will look at the ac resistance, including skin effect and we deal with...

Two driverless and solar power vans have departed from Italy on their way to China via the silk road. During the 13,000 kM trip the vans will drive themselves...

The following tables provide quick order of magnitude fault levels for a a range of typical low voltage situations.

Many medium voltage (MV) indoor switchgear rooms  exist worldwide. The complexity of these rooms varies considerably depending on location, function and...