Answer / mangesh

In gerator syncronisation there are follwoing three steps.
we will call machine to be syncronised as incoming machine
(1) same voltage
(2) same frequency
(3) same phase angle

Scoboscope is used for syancro. also there are another
method named 2bright 1 dark and vice vrsa.

The power angle delta between induced emf and terminal
voltage determines the power transfer.

Answer / lava kumar.v

1. Run first set to voltage and frequency and switch to the main bus bar
2.connect at least 25% Load if regulation is poor.
3.set upto voltage and frequency.
4.synchronize phasing up to bus bar manually or automatically

Above mentioned points are satisfied the Dg will ready for operation
* Adjust engine power as necessary if it takes most of the power it will go out over load ,This will bring down the system.

63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?

0 Answers   GSECL, L&T,

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what is the exact direction of current? as we know current travels from higher potential to lower potential,so if we take battery +ve to -ve implies current direction is from positive terminal to negative terminal.,whereas electrons flow from negative to positive as they are attracted by positive ions.current will be the plow of charge but not flow of positive ions.please clarify my doubt friends.

2 Answers  

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why cant we use earth as neutral at home whereas neutral is actually grounded at transformer end?

4 Answers  

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which transmission is cheaper ac or dc?

10 Answers  

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what is the difference between id fans and fd fans

12 Answers   Perkins Thermal Systems,

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if 2500 KVA TRANSFORMER CAPACITY.33KV INCOMING HOW ARE AMPEAR PRIMERY SAID

3 Answers   Cipla,

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how we arrange the hv side with delta connection in case 33/11kv of transformer.

0 Answers   Jindal,

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1.What is isolators and bus bars?give answer in details

2 Answers  

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If the supply voltage is same (say 440V) whether a system designed for 60 Hz frequency will work with 50 Hz frequency or not , if so pl. give clarification.

11 Answers   ABB,

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Where can i get practical knowledge of solar system?

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List the advantages of star-delta starter with induction motor?

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PLEASE INFORM ABOUT THE IDEAL TEST RESULTS OF MAGNETIC BALANCE TEST OF TRANSFORMER 33/11 kv DELTA-STAR T/F

0 Answers  

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