Answer Posted / ayush

naphthenic mineral oil

What is the difference between type1 and type2 relay protection co-ordination for motor feeders

2221

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Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

1751

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How to back charge the Gas turbine generator

2148

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If short circuit ratio is high is it bad or good for a machine then tell the reason...

2031

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i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1785

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In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

1772

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

2177

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we have 15 ampere variyac but we want 30 ampere variyac what we do

1923

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What is 11 N1 and 12 N2 in single phase Transformer ?

1926

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what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?

2355

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What are the different methodes for calculating the short circuit Current?

2051

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How does an oscillator differ from an amplifier?

1147

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why different series of vfds (like allenbradley)are used in industry ?

2291

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WHTA IS LIMT OF LEAKGE CURRENT OF 11 KV 1 CORE 1000SQ.MM. XLPE CABLE.LOAD ON CABLE IS AROUND 600AMP .LENGTH 500 MTRS.

2138

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What is the minimum underground tank size capacity considered for firefighting purpose?

1950

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