Answer Posted / minal

power cables are used to carry high ac currents, whereas
control cables are DC operated & ore used in control cables

What kind of socket shall be provided for window type air conditioner with cooling capacity upto 18000 BTU/hr

1078

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how we find transformer capacity by ohm

2223

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how to check three phase motor torque value?

2390

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What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

1129

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What is acsr cable and where we use it?

1166

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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?

1758

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which types of relay used in acb and vcb?

2743

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If symmetrical fault occurs at the terminal of a synchronous motor then how the motor will act...explain it..

2161

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when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....

1781

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Is a direct shorth ciruit on a branch MCCB in a Low Voltage Switchboard a correct means of tesing the performance for discrimination?

2342

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WHAT IS MEANT BY OVER EXCITATION IN GENERATOR TRANSFORMERS? DESCRIBE IT.

2709

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what is the meaning of number in (11, 31, 61,14, etc. CDG11, CDG31, CDG61, DDT32

1450

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what is the efficiency of thyristor

1653

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What are Contactors? How they works and what its highest rating?

2153

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What are locations arc protection relay is fixed.

1888

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