Answer / michael

i dont think it is possible,
because i know 1400rpm is
the rated speed or full load speed,
even we vary the frequency still
it will overload because the
2000rpm is higher than the
full load rpm.

Answer / gumnam parinda

u can use variable frequency drive. Yaskava, fugi,franic are the
drive's compney, u can increase or decrease the speed by increse
or decrease the frequency. This is the best method for speed
purpose and also for protection purpose

Answer / simon peter

Use a 3 phase VARIAC transformer bcs v is directly prop to I & if both r increased the speed will increase automatically.....

A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

0 Answers   L&T,

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