last week we did the REF relay test by closing single pole (R phase) of CB and apply 380V at the primary of delta transformer. we get 33A at the primary of the R phase star end. but we get 380A at both R an B in delta side. how and why?
1 3691We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?
5 11807What is the function of restraining coil in differential relay? as well as restraining current?
8 46661WHAT IS DIFFERENCE BETWEEN MANUAL CONTROL AND MAGNETIC CONTROL AND STATE ITS ADVANTAGE /DISADVANTAGE
2090what is back trip and re-trip in protection schemes? why these two? define me the exact function of these two?
1 7577What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??
1903what is the purpose of the armored for the power Or control cable? How to select the type of the armored?
1 4380Post New Siemens Interview Questions
How to calculate entry tax ??(In karnataka) Pls advice me complete computation details.
What are the important topics in spring?
How do you find the complexity of a bubble sort?
What are the attributes of a good software qa engineer?
What is primary index?
What does the command do with respect to the amazon ec2 security groups?
Difference between table and views?
What are the steps for the payment gateway processing?
How media files can be inserted into the wordpress site?
Who is asp in police?
what is a database? : Sql dba
Were you involved in any data conversion, which one?
What is overriding in java?
What is token?
what are the problems that generally occur in power flows??