Electrical and related buildings technology
The following tables provide quick order of magnitude fault levels for a a range of typical low voltage situations.
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Carrying out a protection system discrimination study is critical to ensure the correct functioning of the electrical system in the event of faults. ...
In the previous note we looked at the approach taken by the standard to the sizing of cables and illustrated this with an example. We then looked at one...
Many questions sent in to the site are in connection with motor starting and in particular star-delta. For all but the simplest application, there is...
Many medium voltage (MV) indoor switchgear rooms exist worldwide. The complexity of these rooms varies considerably depending on location, function and...
A UPS is an uninterruptible power supply. It is a device which maintains a continuous supply of electrical power, even in the event of failure of the...
Motor starting and its associated problems are well-known to many people who have worked on large industrial processes. However, these things are, of course...
Traditionally substations have used circuit breakers, current transformers (CT), voltage transformers (VT) and protection relays all wired together using...
The IEC publishes a series of documents and rules governing the preparation of documents, drawings and the referencing of equipment. Depending on country...
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