Answer Posted / suresh raajaa

SWITCH FUSE UNIT. IT IS USED FOR PROTECTING POWER AND
CONTROL CIRCUIT DEPENDS ON THE CURRENT RATING REQUIRED.

Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

2199

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why dc is used in control circuit for mv & hv switchgear instead of ac

1927

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what is electrical machines

3682

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where was current transformer protection units used and why??

2040

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how is calculated the quantity of weight in hot test xlpe?

2514

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CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415

2658

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I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

1677

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Ratings of power transformer,Distribution transformer.

1612

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what is mean by NPS (Negative phase sequence)fault? what is the difference between EFR & OCR faults?

2377

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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 are approaches to tackle sedimentation problem of reservoir?

1030

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what is the basic construction diffrance between servo motor ans sqiralcage induction motor

2492

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Is the installation of the filter cloths necessary before spreading the gravels at the transformer yards?

1947

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how we findout a ignater is faulty or not?

2109

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Why a tesa lamp is glow between two phase?

2014

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