Once you’ve decided that your facility can benefit from power factor correction, you’ll need to choose the optimum type, size, and number of capacitors for your plant. There are two… Read more
Feb 13, 2015 | Edvard
Formally, a relay is a logical element which processes the inputs (mostly voltages and currents) from the system/apparatus and issues a trip decision if a fault within the protection relay‘s… Read more
Feb 09, 2015 | Edvard
Lighting is defined as emergency lighting when it is intended for operation when standard lighting fails. Emergency lighting must be powered by an independent energy source (typically a central power… Read more
Feb 06, 2015 | Edvard
In an apparatus protection perspective, generators constitute a special class of power network equipment because faults are very rare, but can be highly destructive and therefore very costly when they… Read more
Feb 04, 2015 | Edvard
A building site is to have the following electrical equipment available for use: Tower crane, electric motors totalling 75 kW at 415 V; Sump pump, 5 kW at 240 V;… Read more
Feb 02, 2015 | Edvard
A generator set (genset) consists of an engine and a generator and it is best to consider each of them as a system. Individually, each has unique characteristics, but together these qualities have a… Read more
Jan 30, 2015 | Edvard
On-load tap changers (or circuit tap changers), as the name suggests, permit tap changing and hence voltage regulation with the transformer on-load. Tap changing is usually done on the HV… Read more
Jan 28, 2015 | Edvard
This technical article focuses on the widely used miniature circuit breakers rated for 240 V or less. These are smaller and lower-rated versions of industrial-grade molded-case circuit breakers rated for… Read more
Jan 26, 2015 | Edvard
Choosing the power of a static UPS system serving a data center is a decision that involves various elements and which cannot be made before, or independently from, the choice of… Read more
Jan 23, 2015 | Edvard
The most common motor starting device is the low voltage motor-starting contactor. A contactor is defined as “a two-state ON-OFF device for repeatedly establishing and interrupting an electric power circuit.” Contactors are… Read more
Jan 14, 2015 | Edvard
