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ABB Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is Single Phasing fault???(not single-phase fault)

 6 11441

How we calculate the current carriying capacity of the different sizes of Aluminium busbar ?

 3 10090

when is the Ohms law is applicable?

 11 11994

What makes the difference between 50Hz supply and 60Hz supply which one is economical? What is the use of using increased frequency?

 5 6601

why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

 7 5466




what is different between IP55,IP54 and IP66?

 2 45623

which technique servo motor tested o.k or faulty ?

 1 2637

If we have a 2000kva load,How much kvar capacitors we go to add to improve the power factor at 0.9?pls give the calculation and fully theory?

 2 4473

what is a difference b/w earthing & neutral?

 5 6576

What is the difference between Class PX & Class X CT's

 2 14463

What is the difference between MPCB and OLR?

 11 34801

What is Meant by Load factor in Power plant?

 2 10445

What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?

 1059

What are the factor to be consider for CT selection in 132kV substation?

 763

what size of copper busbar use for 11kv 630A

 3 6963

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Un-Answered Questions

what is easiest way to read STL language in PLC?

1834

How u will give new authorizations?

484

Short Answer on _________Accounts Receivable

604

Distribution transformer we provided 2 separate earthing pit for Body and 2 separate earthing pit for neutral,we can not connect separate body earthing pit to other earthing pit but we do metal glanding in secondary side cable termination in both side, transformer and PCC panel (LT Panel), is this safe for transformer and other equipment?

395

Can you explain about TEE protection scheme?

865




What are your top three predictions about how integrated, multichannel marketing in your industry will evolve in coming years? Why?

331

what are the errors faced while bursting the reports and how to solve those errors?

778

What are readout rate?

229

given data are load current & power factor cable core size? plz any one update the calculation formula

552

what is the role of non-radioactive ATP analog for kinase assay?

1417

How does the Hide Empty Folders command in the folder comparison window work?

875

Expand---------NPTO

663

can any one provide me a connection wiring diagram for a DG set control panel along with BOM?

851

Is RSA currently in use ?

916

What is super thermocoupal?

872





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