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|We have 2 no. 4MW DG set. and GEB supply.
But, we running, only 1 DG set. when we done APFC/Power
factor setting : 0.90, then winding temp. Low. but when
setting done : 0.83, then Winding temp. increase.
WHY Why ? ? ?, plz give me answer.
|How to connect frequency meter in metering circuit?(single
phase and three phase frequency meter)phase to phase or
phase to neutral
|plz tell me about BACK emf and how it generates?
|how do we know the LT or HT panel trip by some broblem which
|why field resistance is higher than armature resistance in
dc machines? and why filed resistance is kept at min value
at starting in same time of armature resistance at max value?
|which types of tests are required after commissioning of
6.6 kva tranformer?
|What is the difference between Contactor and Circuit
|how the grounding[earting] is achieved on ships.
|what is the principle of servo motor
|Why Transformer does not work in DC ?
|This is about the recent problem that we have faced in our
We have 6/7.5 MVA. 66/11kV three phase star - star power
transformer. The neutral was solidly connected to the
earthing mat. But because of high resistance of earthing
mat (130 ohm on LV and 180 ohm on HV), one day LV side
neutral earthing conductor melted and we had a huge damage.
Can any one plz tell me what might happen when we connect
power transformer neutral to the earthing mat which has
high resistance (>100 ohm ) ?????
|what is the name of oil used in transformer
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