Answer Posted / ram sajeevan patel

A softstarter is replica of a star-delta starterin which
starting current is controlled by reducing voltage using ac
voltage controller for smooth starting.As Ac voltage
controllers are not suitable for speed control.So,soft
starters are mainly used for starting purpose only.(since
in Ac voltage controller,frequency is fixed,only voltage
has to be varied.Also,It produces predominant harmonics
into the system.
Where as by using VFD,we can control both voltage and
frequency,so speed control is possible above and below Ns.

i want to learn control schedule for 11kv panel? can any one send the detailed control schedule?

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What are the temperature elements?

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working principle of oil startar

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Diagram on interconnectivity of 11kv transformer with RMU (i.e, one incoming and two outgoing or two incoming and one outgoing)

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Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?

2130

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What are unstable systems?

1138

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what is the k var ratting of 1250kva

2100

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how can I calculate charging current of cable/overhead conductor? what is roll of voltage in it ?

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can you plz send l&t aptitude questions if available its urgent plz plz plz

2129

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Is neutral transformer can be called as control transformer?

1984

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my diploma certificate in my higher education college

1620

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Why is the frequency not changed during transformation of electrical energy in a transformer?

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how can maintaince the acb contactor moveing and fixing kit

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DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS

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1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.

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