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My desire to earn more salary made me land in Middle East leaving back my job in R & D of a manufacturing company in India where I worked for 2 years.The job I got here is in the Sales field which was very new for me but I took a chance......Being in Sales one deserves to be more aggressive and...

Cbarn, its the PF capacitor i have accounted... pls. note these arent measured values...im going by the theory....

Hi Again, Yes, Cbarn the ballast is just a choke in this case, the ordinary reactor type not the Autotransformer type. If PF is considered as Steve suggests For a PF of 0.85, Lamp wattage = 1000W, Ballast loss = 50W Input Current, Ip = (1000 + 50)/(230*0.85) = 5 .37 A As HID lamps operate at...

Hi All, its understood that HId lamps operate at 110V while its running, eventhough the i/p supply voltage is 230V...........the remaining voltage being dropped across the ballast. Now what confuses , is the current drawn by the lamp and the input current. for example.. if the lamp...

Why is that supply voltages have been standardised to 230/240/250V...ALso in America we find it is different in different regions, 120/240/277...what are the advantages of this?Also does the frequency play role in our household equipments like tv,refrigerator...

dear scottyuk/jbartos, well my idea is to run the synchronous motor at two speeds.we have both 12v/120V 60 Hz ,2/3 W syn motors. We are thinking of rotating this motor at 6rpm during the first on and after one more on should rotate at 2 rpm synchronosly with the other units connected.The motor...

I need some help regarding the design of CWA ballasts. There are different tappings on the primary of the ballasts e.g.120 V,230 V,277 V etc. On the secondary the HPS lamp is connected via a capacitor. B'cos of current limiting an insulation fault in the secondary coil results in a slow build...

I hope to get a book by Petruzella soon.Thank you PLCSAVVY for the information. I have downloaded PlC ladder logic from mrplc.com.Now I am familiarised with drawing ladder networks.Chris would you please advise what should be the next step.

Dear M3, Thank You very much for your suggestion. Regards Shiju

I have a circuit which is used to control a 12 V dc ,3W ,stepper motor using PIC.The input supply is 120 V ac,60 Hz which is then reduced to 12 V using capacitor as impedance. The electrolytic capacitor used after the bridge is 470 mfd,25 V. Now I have decided to run the motor by taking 12 V...

Thank You very much for the information.

I would like to know if there is any method by which speed of a 120VAC,60Hz,2W,2rpm synchronous motor be changed .