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Siemens Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?

2 18305

I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

2313

what would happen if reactive power (kvar)is increased (more)or decreased (less)? how much exact reactive power should be maintained? and what should be done for that

2265

A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

2167

What is distance protection relay? where & why we use this relay?

2 12906

what are the installation procedure of high voltage power transformer,CT,CB&PT?

2063

what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer

2109

Where is the center of magnetic field in alternator

1 5899

what is the diffrence between preventive maintinance corrective maintinance?

7 21132

in a dc motor we supply current only to the armature conductors,from where is the field winding gets excited then??

3 6104

what are corona losses

3 6691

How to know Resistance and Reactance value of main and aux winding of single phase capacitor start capacitor run induction motor to find capacitor value?

2044

what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

1 5414

What is Harmonics how it is produced and what is the method to control the same

2283

What is the problem, if a circuit breaker is not closing.

4 19707

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Siemens Electrical Engineering Interview Questions (189)

Un-Answered Questions

how will map a folder through ad? : Windows server 2003

330

What is the Difference between command attention key and command function key ?

1376

What are the asp objects?

993

Explain what combiners are and when you should use a combiner in a mapreduce job?

612

Where do I run php code?

944

Explain the use of spring security?

418

What are sv and sh waves?

1075

Dear concern Plz provide me the solved papers of Railway section engineer in signal...

1938

What is the command that is used in node.js to import external libraries?

541

Let’s say we live in a country that gets very cold, in Northern America / Europe. In winter, we monitor the ouside temperature, so that heaters can be switched on, inside the house. The idea is that, the colder it is outside, the warmer it should be inside. The heating side of things is just a heater that is either switched on, or switched off. Just from the information that has been given, please discuss this matter in depth. Provide reference to OPEN / CLOSED loop control, FEEDFORWARD / FEEDBACK control and MODULATING / ON_OFF control raised in the discussion.

1556

Explain the staffing status

936

What is a local currency?

1231

the c# keyword .int. Maps to which .net type?

1136

Can we add a hyperlink in the description of the application?

901

List out the differences between global and local temp tables in sql server?

1058