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Siemens Electrical Engineering Interview Questions

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

2 18336

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?

2327

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

2273

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?

2173

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

2 12926

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

2084

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

2124

Where is the center of magnetic field in alternator

1 5907

what is the diffrence between preventive maintinance corrective maintinance?

7 21170

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

3 6133

what are corona losses

3 6710

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?

2049

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 5425

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

2298

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

4 19733

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Siemens Electrical Engineering Interview Questions

Siemens Electrical Engineering Interview Questions (189)

Un-Answered Questions

Explain the use of off cycle work bench.

935

What is the gradient in adobe photoshop?

How to integrate spring and hibernate frameworks?

419

What is cmap and oTD. What is the use of OTD?

3450

Why magento is used?

What is replicaset?

1020

What leads assets to turn into a private equity?

1143

Explain what are the accounting events that are frequently involved in compound entries?

1191

why should we choose VSTET(Visual Studio Team Edition for Testers) and not QTP?pleas give me the reasons for "WHY" we have web and client server app, supports power builder and on windows OS so this is the background of tech and envir things we have and now VSTET is good to use or not? if "NO" then tell me why

2277

What do you mean by Driver Script?

1181

What are the difference between soft delete & delete in laravel?

740

Differences between private, protected and public and give examples.

1081

Explain web sql?

914

How to convert linq query to list?

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

1948