Answer Posted / raghavansa

lagging/leading current means current lag/lead voltage.
Induction load like motors take lagging current. Capacitive
load like power capacitor takes leading current. Resistive
load like heaters in phase. If current is lagging, Power
factor is lagging.

What is maximum power transfer theorem?

1035

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I want to replace the 3 KW DC motor with AC motor so what should be the rating of AC motor? Details Of DC motor to be changed with AC are - Kw - 3, Vf - 310, If - 0.15, Va - 400, Ia - 13, RPM - 2400

1774

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what is the purpose that we use PLC system in power system

4948

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will 1050kva DG set withstand for back charge of 16MVA transformer

1801

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I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

1610

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Power factor =1.000 at factory in supply. However, PF = 0.8 at motor end. Current = 100 Amp, Voltage = 400 V. What is the power distribution loss? Can I reduce it by adding capacitor at the load feeder?

1999

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What is Fire Panel ? How it works ?

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which capacity of RCCB used for five thousand watt electricity load?

1810

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THERMAL CAPACITANCE IS MEASURED IN..................................................

2093

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

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whats the differece between Exd and Exe

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can i able to get bhel previous exam question paper?

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What is the difference between relays and contactor construction wise?

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