What is class 2 coordination ?

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My ups output shows 230 v between phase and neutral,but show zero between phase and earth.Is the system/installation is correct.If not what will be the possible reasons

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What are the effects to a distribution transformer rated 10Kv with ratio 10Kv/0.433Kv, 3phase 50hz for example but fed with power supply of 11Kv?

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Why do we will ground the positive terminal in electrostatic precipitator

1 Answers   JSW,

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- two pumps must work with them at the same time but if the first pump start the second pump  must delayed for some time to start  also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it

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WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >

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For overhead protection we use which transformer?

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what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

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I am selected in OCL(Orissa cement Limited), but they have a Tech PI round their at their plant.Anybody has any idea that what kind of questions they are going to ask??Please guies help me. I am in serious headache.I have heard that huge elimination is done at there.

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what is the difference between the voltage of 5 volts capacitor and and 5volts battery?

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FRIENDS, I am doing DEEE (part time)final year. Give me some ideas for project

5 Answers   HCL,

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how ceiling fan worked?

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