Answer / vinayak

tubelight works on the principle of electric discharge.
starter act as a switch and choke acts as an inductor. when
tubelight is switched on the electricity flows through
starter which is actually a capacitor. sooner the dielectric
strength decreases and it gets shorted hence switching of
the supply through inductor. during this time the choke
stores energy which is appeared across the electrodes of the
tubelight and hence helps in ionsation of gas and electric
discharge. starter is connected in parallel to tubelight and
choke is in series

sir, what is the importance of Fault MVA. how to calculate fault mva of 33kv substation connected by 6.5 km line(single circuit with equal spacing) with 110/11kv transformer in 110kv susbstation.the fault mva on 11 kv bus in 110kv susbstation is 208mva.

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