GATE EE | Measurements | Important Concept | PYQs Series
Автор: electricwisers
Загружено: 2025-05-17
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GATE EE | Measurements| Important Concept | PYQs Series
Power Factor of 3-Phase Star Load with Negative Wattmeter Reading | GATE EE Concept
A 3-phase, star-connected, balanced load is supplied from a 3-phase, 400 V (rms), balanced voltage source with phase sequence R-Y-B. In this video, we’ll solve a unique and conceptual problem involving a negative wattmeter reading of −400 W and a line current of 𝐼𝑅 = 2 A (rms). The focus is on determining the power factor of the load per phase based on these values.
We’ll walk through the two-wattmeter method for power measurement, the implication of a negative wattmeter reading, and the relation between line voltage, current, and power factor in a star-connected system. You'll visually understand how power factor becomes leading in such scenarios and how phase angles affect the total power reading.
This is a frequently asked type of question in competitive exams like GATE EE and helps build strong fundamentals in power systems. If you’re preparing for GATE or any electrical exam, make sure you watch this till the end.
#powersystems #powerfactor #loadpowerfactor
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