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Power factor is determined by the nature (resistive, inductive, capacitive) of a load, not whether it is a low load or a high load.
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What is the efficiency of power transformer at same load at 0.9 lead and 0.9 lag power factor?
Same
When is a transformer closet to unity power factor?
When it supplies a resistive load.
What are common efficiencies for transformers?
Transformer utilization factor is the ration of power delivered to the load and ac rating of the transformer secondary.
Why the power factor of a transformer is poor at no load?
The inductance of the transformer is much higher than the resistance of the transformer, resulting in very low real power losses (in watts), but some reactive power (vars).
How much kvar capacitor bank installed for 2000 kva transformer?
It depends on the power factor of the load, but for a load power factor of 0.7 on a 2000 kVA transformer the real power and reactive power are both 1400 kilo (watts and VAR). So a 1400 kVAR capacitor on the load would restore the power factor to 1, allowing 2000 kW to be drawn instead of only 1400 kW.
What is the efficiency of power transformer at same load at 0.9 lead and 0.9 lag power factor?
Same
Why transformer power factor taken unity?
It isn't! A transformer operating at no load has a very low power factor.
What condition you get negative regulation for transformer?
When its load has a leading power factor.
When is a transformer closet to unity power factor?
When it supplies a resistive load.
Why does the power factor of the load effects the V.R. of transformer?
With varying power factor the load current drawn changes, which in turn affects the voltage regulation
What are common efficiencies for transformers?
Transformer utilization factor is the ration of power delivered to the load and ac rating of the transformer secondary.
Why the power factor of a transformer is poor at no load?
The inductance of the transformer is much higher than the resistance of the transformer, resulting in very low real power losses (in watts), but some reactive power (vars).
What is the condition for zero voltage regulation of a single phase transformer?
zero volatge regulation means the terminal volatge of transformer at full load on a given power factor become equal to the rated teriminal volatge of transformer , it happens only for leading power factor in transformer
How much kvar capacitor bank installed for 2000 kva transformer?
It depends on the power factor of the load, but for a load power factor of 0.7 on a 2000 kVA transformer the real power and reactive power are both 1400 kilo (watts and VAR). So a 1400 kVAR capacitor on the load would restore the power factor to 1, allowing 2000 kW to be drawn instead of only 1400 kW.
What is the load of a step down transformer for 40HP?
Hi, First understand one thing seriously!! The transformer only can be rated in KVA. Bcoz, its power factor not depends on the load connected.
Why you use low power factor wattmeter on primary and unity power factor on secondary side of transformer?
There is no such thing as a 'low power-factor' wattmeter. A wattmeter always reads true power, regardless of the load's power factor.
What is the use of transformer utilisation factor?
It tells us how much is the transformer utilised in a given process. For a rectifier,TUF =(D.c.power delivered to the load)/(power rating of transformer secondary)
