Answer / m.kumaran

while the motor runs from rest position the resistance of winding is very low so the motor gets more current.it will damage the motor winding so aviod this we use some starters for limiting the starting current.

how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

2 Answers  

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What are the functions of different probes used in cro?

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Basic motor transformer generator

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when we connect a ceiling fan to a inverter's output voltage, it give some noise, why?

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how many current required for hypo test

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We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

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how to decrese the PH value of liquid resistance?

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how to modify DOL control panel into Delta Y connection?

0 Answers   ABB, PDCS,

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On the secondary side of a distribution transformer, we use 1c x 630 sq mm cable. Why dont we use 4 core cables instead of 1 core cables on the secondary. Why we use aluminium cable glands on the outgoing instead of brass cable glands?

2 Answers   Siemens,

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30 kVA and voltage 380/220VAC how to find out kA?

5 Answers  

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can we install HT panel & LT panel side by side or how much clearance is required ?

0 Answers  

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