why doesnt the back emf hold the speed of unloaded series motor?

1 Answers  

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which %age if losses increases when frequency is increased to 25%

4 Answers   Maihar Cement, Siemens,

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What are the testing to be done before the installation of 1000 KVA Transformer?

3 Answers   L&T,

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how to calculate cable size for the motor

2 Answers  

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what is bus duct and what is differance between bus duct and bus bar

6 Answers  

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What is the meaning of TRI Vector meter?

7 Answers   ABB, Excel Power Switchgear,

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How to calulate the NGR resistance ?

1 Answers   L&T,

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Can any one tell me the current VAT, Sales Tax, Octroi and Excise duty for the financial year 2009 -2010. Say control panels are manufactured in maharashtra, then what will be the taxes for within Maharashtra and outside Maharashtra?

1 Answers  

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what is the difference beteen differential protection and over current protection of an alternator

2 Answers   GVK,

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in a 740 kw dc seperately excited motor field voltage is constant about 17.4 volts and armature voltage is500 volts dc. how it is possible to have two different voltages from single transformer of output voltage 500 volts? if any difficulty in question contact ajitsingh.kadian@gmail.com

1 Answers  

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Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

0 Answers  

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To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

0 Answers  

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