Monthly Archive for: «October, 2011»

The Importance of the Correct PPE

Whilst awareness of the dangers of arc flash has continued to increase over the last few years, the number of incidents that are still occurring on a daily basis are shockingly high…. Read more

Oct 29, 2011 | cgoulds

Electrical safety

Transformer Testing Techniques

Cant see this video? Click here to watch it on Youtube. Substation transformers can range from the size of a garbage can to the size of a small house; they can be… Read more

Oct 27, 2011 | Edvard

Power Semiconductor Device – Transistor

Power transistors are used in applications ranging from a few to several hundred kilowatts and switching frequencies up to about 10 kHz. Power transistors used in power conversion applications are generally npn… Read more

Oct 27, 2011 | Edvard


How Low-Voltage Air Circuit Breaker Works?

A low-voltage circuit breaker is one which is suited for circuits rated at 600 volts or lower. One of the most commonly used low-voltage air circuit breakers is the molded case circuit… Read more

Oct 23, 2011 | Edvard

air circuir breakers - how they works

Insulated-Gate Bipolar Transistor (IGBT)

The IGBT has the high input impedance and high-speed characteristics of a MOSFET with the conductivity characteristic (low saturation voltage) of a bipolar transistor. The IGBT is turned on by applying a… Read more

Oct 21, 2011 | Edvard

IGBTs classified as punch-through (PT) and nonpunch-through (NPT) structures
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