Answer Posted / nonx

A substation consists of step-up/step-down transformer,
breakers, disconnects, and the necessary protection and
metering instruments. A switch yard contains these less the
transformer. Both of this can be configured to have
interconnections.

why current is constant on d.c?

2133

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What is the significance of integral controller and derivative controller in a pid controller?

1236

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Load break swicth maintenance procedure.

1815

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If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

2122

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What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?

4079

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To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1967

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why do we need to use 3c+3e cable, normally i select only 3c+e cable and i think it is enough. pls explain the usefull of 3e cable ( in this project the earthing system is well done)

2515

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what is the use of Auto re-closer?

2207

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What conditions are required for transformer to operate at low frequencies ?

2044

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Why neutral point is consider as zero potential?

2707

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I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.

2253

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How halogen & merquery lamp works.

2221

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STATE USE OF ARC RUNNERS & SPLITTERS ?

1995

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Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?

1911

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HI....HOW CAN BE MESARED THE VALVE OF NEUTRAL GROUND RESISTOR WHIC IS LOCATED AT SWICHGEAR ON GENERATOR SIDE....

2142

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