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Monthly Archive for: «October, 2014»

Applications and characteristics of differential relays (ANSI 87)

Differential relays generally fall within one of two broad categories: Current-differential and High-impedance differential Current-differential relays are typically used to protect large transformers, generators, and motors. For these devices detection of low-level winding-to-ground faults… Read more

Oct 29, 2014 | Edvard

Applications and characteristics of differential relays (ANSI 87)

Automation Migration Strategy in 3 Phases

Owing to competitive pressures in the marketplace, a company often needs to introduce a new product in the shortest possible time. The easiest and least expensive way to accomplish this objective is… Read more

Oct 27, 2014 | Edvard

Guidelines to maintenance of low voltage switchboard

A well-executed maintenance program can provide the following benefits: Longer life of switchboard and fewer replacements; Reduced time on repairs and overhauls, and the option of scheduling them at an opportune time; Fewer… Read more

Oct 24, 2014 | Edvard

Guidelines to maintenance of low voltage switchboard

9 Most Common Power Quality Problems

The most common types of Power Quality problems are presented below along with their description, causes and consequences: Voltage sag (or dip) Very short interruptions Long interruptions Voltage spike Voltage swell Harmonic… Read more

Oct 20, 2014 | Edvard

9 Most Common Power Quality Problems
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