Answer / ganesh ajabe

Firstly to calculate total load in house
then calculate total current
if this current is 5A
else switch can be selected 6A

Answer / prasanna kumar

sfu is called as switch fuse unit.this will be used to
switch on/off a motor or vfd's etc.According to the current
rating of the motor i.e calulated by p=1.732 vi cos0 fuse
rating will be three times of that motor current and the
fuse rating will decide the sfu rating.if fuse is 64A in all
three phases then the sfu will be 64A.

what do you mean by PF correction. A motor is rated at 15 kw,415 volts, 0.7 pf and eff of 0.92. The powerfactor is improved to 0.98 by adding capacitors at the bus. calculate the current drawn by motor under full load condition before and after pf correction

5 Answers  

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Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection

0 Answers  

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In power transformer tappings are provided on A high voltage side B low voltage side C In middle of both the windings D both high and low voltage side

2 Answers   NNN,

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Hai I have 2500KVA,Transformer,13.8KV/380.DELTA/STAR.How much load that I can take interms of current?How can I calculate also when I have loads in KW?

10 Answers   L&T,

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Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

2 Answers   Jindal, Reliance,

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how you can select circuit breaker for 2000kva transformer?

9 Answers   TATA,

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Difference between RCCB, RCBO and ELMCB.

0 Answers   Megatron Solutions,

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what is RTD? what is THERMOCOUPLE? What is difference between it?

2 Answers   Bhel,

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why d.c. supply is given to the primary side of generator?

4 Answers  

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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 timing for mccb 800A tripping?

1 Answers   L&T,

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why transformers are rated in KVA

3 Answers   AITM,

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