Electromagnetic Compatibility (EMC)
	Electromagnetic compatibility (EMC) is the study of coordinating electromagnetic fields give off equipment, with the withstand (compatibility) of other equipment within the vicinity. In it's simplest form, we endeavour to ensure that the magnitude of any electromagnetic fields generated are less than the withstand level......Read More.. By Steven on 7/10/2012 1:23 AM

Motor Starting - Star Delta
	Having looked at DOL starting in the last article, we will now consider Star Delta Starting (or Wye/Delta in the US). This is the first reduced voltage starting method we will look at. Voltage reduction during star-delta starting is achieved by physically reconfiguring the motor windings. During starting the motor windings......Read More.. By Steven on 9/13/2011 12:56 AM

Lightning Risk Assessment (IEC 62305)
	IEC 62305 'Protection against lightning' requires a risk assessment be carried out to determine the characteristics of any lightning protection system to be installed. There is a lot of hype about about this being a complicated process, however in reality it is very simple....Read More.. By Steven on 9/27/2009 5:18 PM

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hARDIK asked the question Transformer fault

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Steven commented on Re: Motor Starting - Star Delta

I think if you follow the connections as shown, the rotation will be clockwise and consistent. In case there is some wiring problem, you should always check the rotation as part of commissioning. I've also added a section on connections to the post. There are other ways to wire the motor, you just need to think them through. If something does go wrong with the windings, hopefully the motor protection will operate.

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