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Lupin Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the difference in MCB, MCCB, RCCB, ELCB, & MPCB (motor protection circuit bracker)

12 182231

what is the working principle of energy saver control panel. please give the complete calculation & theory.


When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<


how to calculate the multiplying factor for energy meter with CT ratio given

23 235706

What is switch gear? How it is work ?

1 3372

comparision between ACB and VCB


When we need up only in o/p 440v, so why we use directly in 11kva in input?


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Un-Answered Questions

The “preserve” check box must only be used at what stage in blue prism?


What is django template language?


Can a stored procedure call itself or a recursive stored procedure? How many levels of sp nesting is possible?


If a function does not have a return statement, is it valid?


we are using order related billing and billing get generated automaticaly in overnight run.As my q is user has cancel the biliiing document after creating that one.but after cancelation no cancel accounting document get sales order remain closed and no billing document get generate in overnight run.but when user has created the Credit memo order with respect to cancel billing document the respective sales order get open and billing document get generate in overnight can you please tell me hwo the system come to knoe after rasing the credit meno order that billing document has cancled and sales order has open so the billing document will be craete.please help me regarding thsi query.


How to Preserve bacteria in PBS for immunization ?


what r the verstions from 1st to present (verstions) of mercury tools (like winrunner,QTP,Loadrunner) ? Chandana


What is the negative and positive testing?


What are the different software testing tools?


Because of dna replication, two dna molecules come to existence. Why is not it correct to assert that two “new” dna molecules are created? What is the name given to the process concerning that fact?


What is histogram-based operations?


What is database descriptor?


What is dd() function in laravel?


What is moz in css?


How do I support both get and post from the same servlet?