What is the test block protection relay if any body know plz explained

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Does induction motor start with dc power supply????

4 Answers   Essar,

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Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

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how to reduce power loss when the tranmission under long distance?

19 Answers  

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why does fans rotate in anticlockwise direction?

1 Answers  

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Where we can use 3.5c cables instead of 4c cables.Why?

4 Answers  

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5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch

0 Answers  

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hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx

0 Answers   Ansaldo,

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I AM A ELECTRICAL PANEL BOARD DESIGN ENGINEER.IF I GO ANY INTERVIEW ,TECHNICALLY WHAT ARE QUESTIONS I WILL FACE FROM INTERVIEWER?

0 Answers   Bell,

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Difference between directional over current and non directional over current ?

2 Answers  

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What is Surge arrest? How it work?

4 Answers  

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Does the total power means fundamental plus Harmonics?

2 Answers  

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