Answer / alagar

KVA

Answer / koti

KVA of Tr=starting KVA of largest motor at lowest pf + rated KVA of other motors/loads

how can maintaince the acb contactor moveing and fixing kit

0 Answers   Gulf Cement,

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What is the difference between the watt hour meter and Var hour meter in terms of internal connection and work theory . ie "When the meter records watt-hour an when the meter records var hours ??"

13 Answers  

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what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

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transformer 3 ph, 225 kva pri 480v, sec 208v. primary neutral connected to system, is secondary neutral to be grounded and how

1 Answers  

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Is it possible we are step down 11 kv to 230v ?

2 Answers   Fedco,

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what is effect of 5amp fuse on 2mva pry protection of transformer

0 Answers  

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any one guide me to reduce the power factor of diesel Generator from 0.97 Leg to 0.8 Leg.with out any change in my load.

0 Answers  

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What is VCC?

1 Answers  

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What will be the total current for 300kva UPS if it runs on 40 to 45 percent load. Is there any formula for to calculate the exact load.

4 Answers   Sodexo,

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why do we prefer alternating current in india where as in USA prefers DC?

3 Answers   Bhel, GMR, Texmo,

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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how to calulate multiplying factor if meter ratio is /5 ampere and ct ratio is 100/5 ampere.(our supply is 3 phase 415 volts)what is multiply factor?

3 Answers   Vivek Engineers,

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