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Example 6.2 : A single phase motor connected to 400 V, 50 Hz supply takes 31.7A at a power factor of 0.7 lagging. Calculate the capacitance required in parallel with the motor to raise the power factor to 0.9 lagging.

400 V, 50 Hz সরবরাহের সাথে সংযুক্ত একটি একক ফেজ মোটর 0.7 ল্যাগিং এর পাওয়ার ফ্যাক্টরে 31.7A নেয়। পাওয়ার ফ্যাক্টরকে 0.9 ল্যাগিং-এ বাড়াতে মোটরের সাথে সমান্তরালে প্রযোজনীয় ক্যাপাসিট্যান্স নির্ণয় করুন।

Created: 7 months ago | Updated: 7 months ago
Updated: 7 months ago
Ans :

C = Qcω Vrms2 

= P (tan θ1-tan θ2)ω Vrms2

= (400×31.7×0.7)×tan (cos-10.7)-tan(cos-10.9)2×3.1416 ×50 × 4002

=94.3 µF Ans.

7 months ago

ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)

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For t<0, the switch is closed.

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