How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?

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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

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An AC coil to give DC supply whats happen in the coil.what type of problem are create.

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Earth bits close or open. Which is correct

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what is the mean of short circuuit current ( for ex. 50KA)?

2 Answers   Weltech Engineering,

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i want to make an elec generater with only 12v car battery car alternater and 12 volt motor ..... will the battery charge and give power at same time with out over charging the battery?

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Brushed alternator is also called dc generator ? its true or false ?explain it ?

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Which standard we are following earthing resistance test

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if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

1 Answers  

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whye the current increases in the motor when the load on the motor increases

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what is short circuit force ? How to calculate it for Panel?

1 Answers   Bilt,

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why you don not show protection and type of isolation in key single line diagram?

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