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Monthly Archive for: «October, 2011»

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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… 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… 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… Read more

Oct 27, 2011 | Edvard

NEC 2SD555 NPN POWER TRANSISTOR VCB=400V 10A 200W TO-3

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… Read more

Oct 21, 2011 | Edvard

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