Answer / vagish m r

Basically there are solar collectors which collect the sun
rays. They are in concave shape, flat etc. Solar cells convert
Solar energy into Electrical energy. They are silicon coated
cells. They work on photo electric effect. when light falls
on the cells, valence electrons are liberated by absorbing the
light energy. These electrons start circulating & form
Electricity.

how can we change the phase angle b/w two phase?

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. What should be the minimum and maximum ohmic value for earthing?

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MY QUATION IS ABT THE MAIN POWER TRANSFORMER IN STEEL PLANT , I WISH TO KNOW THAT WHY TRANSFORMER PROTECTION NOT TRIP AS CABLES ON THE SECONDAY SIDE IS WATER COOLED. TRANFORMER DETAIL NORMAL KVA--150 KVA PRIMARY VOLTAGE --34.5 KV SEC.NO-LOAD VOLTAGE---1.290-908-690V ( WITH PRIMARY DELTA CONNECTED) CONNECTION--D/d (EXTERNAL CLOSED) CONSTANT RATEING FROM--1.290-908V CONSTANT CURRENT FROM--908-690 VECTOR GROUP--D III

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What, in the construction of a transformer, controls KVA? For example 600/208/120 V transformer can be 10kVA or 45kVA!!! What do we change in the construction of a Transformer in order to change the rating but not the voltage.

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Where burned of electricity,when,who, & why.

0 Answers   NIGP,

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Slow acting fuses are most often used for which application a) Lighting circuit b) heating circuit c) Motor D) Radar circuit

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Define closed loop control system.

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Why field rheostat is kept in minimum position while armature rheostat at maximum position?

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what is power transformer?

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When is lag lead compensator is required?

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what happens when back feeding supply accidently collapses with normal supply ??? How?? [that is sometimes in a substation 11kv feeder if their ws long time permit work, back feeding supply will provide from nearest substation... if accidently after the permit work,they charged the feeder without removing back feeding wat will happen...?]

1 Answers   KSEB,

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What is the formula to calculate capacitor bank rating for a certain load.

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