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 3685We 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 11796What is the function of restraining coil in differential relay? as well as restraining current?
8 46639WHAT IS DIFFERENCE BETWEEN MANUAL CONTROL AND MAGNETIC CONTROL AND STATE ITS ADVANTAGE /DISADVANTAGE
2088what is back trip and re-trip in protection schemes? why these two? define me the exact function of these two?
1 7571What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??
1897what is the purpose of the armored for the power Or control cable? How to select the type of the armored?
1 4378How you calculating the current for a 2.5 Sqmm cable. A 30 Hp 3 phase AC motor of power what size of cable is used for this motor.
7 24483Post New Siemens Electrical Engineering Interview Questions
What does chkdsk c/f do?
What is transaction performance graph?
How do you extend sap cloud based applications?
What is object type in c#?
How to extends two classes in typescript?
What is balance factor?
What is encapsulation and abstraction? How are they implemented in C++?
The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input
What are your views on Kashmir issue?
How do you replace a string in java?
What is application in jsp?
What is difference between google sheets and excel?
Explain python’s pass by references vs pass by value.
Where is office xml handler located?
Which form of isomers of a substance is more stable?