Electrical and related buildings technology
When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...
The International System of Units (abbreviated SI) is the world's most widely used system of units. The system consists of a set of units and prefixes...
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...
Fault calculations are one of the most common types of calculation carried out during the design and analysis of electrical systems. These calculations...
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...
The windings of many medium and small sized transformers are protected by restricted earth fault (REF) systems. The illustration shows the principal of...
Various arguments exist around SF6 Gas Insulated (GIS) and Air Insulated (AIS) medium voltage switchgear. Recently we had to change a GIS design to AI...
One of the fundamental requirements of an alternating current distribution systems it to have the ability to change the magnitude of voltages. It is more...
IEC 61439 'Low-voltage switchgear and controlgear assemblies', specifies standard arrangements of switchboard (call forms of internal separation). The...
Problems on achieving maximum voltage drop within an installation come up often. Depending where you live, local regulations will have different limits...
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