Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

a) In a mono-phase AC network with the supply voltage U [V], we want to measure the power drawn by a load of the power

a) In a mono-phase AC network with the supply voltage U [V], we want to measure the power drawn by a load of the power factor pf which draws a current of I [A]. The W-meter used for this purpose has the ranges: "Unw=20, Inw=1/4". Determine appropriate specs for additional components to be used and draw the whole measuring circuit. According to your circuit, calculate the pf, in case the W-meter pointer deflects by 1/10th of full scale (Qw=Qwmaw/10).

b) In a 3-phase balanced system with inductive load, the voltage circuit of a W-meter is connected between the phases T-R (not R-T !) (Uw=Uru) and the current of phase S is flowing through the current coil of the W-meter (Iw=Is). By drawing the phasor diagram obtain the total reactive power drawn by the load in terms of the value Pw the W-meter reads.

Step by Step Solution

3.43 Rating (162 Votes )

There are 3 Steps involved in it

Step: 1

a To measure the power drawn by a load of the power factor pf in a monophase AC network additional c... blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Modern Control Systems

Authors: Richard C. Dorf, Robert H. Bishop

12th edition

136024580, 978-0136024583

More Books

Students also viewed these Accounting questions