Answer Posted / prabhakar

synchronization is done between two similar equipments
(generator,transformer) w.r.t FREQUENCY,KVA RATING MUST BE
SAME.

when ID fan will immediately stop through VFD what exactly cause and problem the ID fan

1407

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a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

1505

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Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

2071

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what will happen if synchronous machine rotor fed from single phase ac supply 

1699

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Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. I am going to install a oo kva transformer & 380 kva dg set what should the earthing value?

1117

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Electronic circuit

996

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On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

2594

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How 48-relay (incomplete sequence) functions?

4046

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how to find the multiplication factor for digital energy meter and analog energy meter

2168

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i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

2201

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Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir

1875

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what is the difference between ups & inverter

6976

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What is sink and source?

1154

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What is the difference between cylindrical-type and sandwich-type winding?

1428

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george phenomenon of synchronous machine

7497

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