Answer Posted / chandan adhikary

Pulse width modulation is the best way of speed control of dc motor..

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

1924

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How to calculate or formula to calculate rhe power in 2 phase system ??

1513

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What tests should i carry over on a newly rewinded DC Generator with voltage rating of 38 volts and current rating of 350 amps, to certify that the machine is OK?

1886

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Give two basic speed control scheme of dc shunt motor?

1104

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george phenomenon of synchronous machine

7558

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In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?

1967

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Swg formulae

2026

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how we calculate the short circuit capacity of the busbar in LV & HT?

1109

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700KW 6.6KV slip ring induction motor to use VFD to control the speed

3211

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why effective resistance should be more than static resistance in transmission line?

2102

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What is the universal motor?

1116

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What are the symptoms of a bad PG card of a drive (inverter) esp. of Yaskawa Ac Drives (inverters) G7 ?

2055

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I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

1755

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What is mathematical model of a control system?

1150

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what is difference between 5A and 100A CT constructional wise and operation?

3573

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