There are a lot of interesting two page type notes on various medium voltage topics – switchgear, circuit breakers, bus systems etc. It is on the Siemens...

Insulation on a motor prevents interconnection of windings and the winding to earth.  When looking at motors, it is important to understand how the insulation...

We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

GE have put together a time-lapse video shown flight take-off and landings at some airports. An interesting view:

The correct sizing of current transformers is required to ensure satisfactory operation of measuring instruments and protection relays. Several methods...

If you have a great idea or invent something the last thing you want is someone to steal the idea. One of the things you can do is protect the intellectual...

Following on from my post on railway electrification voltages, I thought an introduction to traction substations would be a good idea. Traction substations...

While not as popular as it once was, frame leakage protection does still have some use in some circumstances.  In essence frame leakage is an earth fault...

The fundamental component of any analogue computer is the operational amplifier, or op amp. An operational amplifier (often called an op-amp,) is a high...

This is the second post in a series of two on periodic electrical inspections. In the first post, I discussed how often inspections should be carried out...