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Auxiliary relay used for standby protection of electrical circuit when main relay fails to operate.
PLA relay used for feedback purpose.its work like a NO NC .

How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.

0 Answers  

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draw the full wave and half wave circuit of 3 phase system and inverter circuit used in ups 

0 Answers  

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Where the excitation is given either stator or rotor in actually in power plants?

8 Answers  

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Why we should not parallel the with EB

1 Answers  

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Explain the Term in CT Name Plate – Class: 5Ps

3 Answers   Divis Laboratories,

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How to address the servo drive for motor

0 Answers  

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can we use 3 phase UPS for Motors and Other Machines

4 Answers   ACC,

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what is the minning of propotional, integral, derivative ?

1 Answers  

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what is iron loss?

4 Answers   RRB,

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Kindly Tell me name of the book for electrical estimation and costing ,calculation or web site to download

1 Answers   ABB,

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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?

0 Answers  

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What will happen if primary of transformer is fed with Square wave instead of sinsoidal wave ?Will it operate or Not?

3 Answers   Areva,

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