Answer Posted / j.senthamizh

First we should be convert ac into dc using rectifier. Dc
motor speed control method classified into two 1.armature
control 2.field control . we are using armature control
method motor speed can be control below rated speed.or
using field control method the motor speed is above rated
speed. most people using armature control method because
field control method is dangerous than armature control
method.we are using field speed control at motor is running
condition and now field is open which times motor running at
dangerous speed. at the time motor bearing and shaft is
affected this condition.

why it is not advisable to run low rating (19KVA) DG sets in parallel for long durations even though they are provided with droop ckts (QDC)

1960

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what are types of encoder

1917

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Do closed loops systems require manual input?

1267

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What is the cut-off rate?

1222

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Swg formulae

2080

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how to calculation increase power factor for single phase

2347

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give me atleast four differences between circuit and network

2220

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while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends

2914

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A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

2065

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How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

2073

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what is the advantage of connecting capacitors in delta than in star?

2156

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how to calculate single phase motor efficiency ?

2320

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why can we use cosine wave instead of sine in ac supply as both have same rms vale and ripple factor

2612

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How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs

5253

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How to synchronization will be done between two DGs ?

1824

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