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3-24 A rectifier ammeter has the following components: PMMC instrument with FSD = 200 µA and Rm = 900 N; current transformer with N, = 600 and N, = 5; diodes with VF - 0.3 V; meter series resistance R, = 270 kN; transformer shunt secondary resis- tance RL = 98.7 kN. Calculate the level of transformer primary current for instru- ment FSD.

3-24 A rectifier ammeter has the following components: PMMC instrument with FSD = 200 µA and Rm = 900 N; current transformer with N, = 600 and N, = 5; diodes with VF - 0.3 V; meter series resistance R, = 270 kN; transformer shunt secondary resis- tance RL = 98.7 kN. Calculate the level of transformer primary current for instru- ment FSD.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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3-24 A rectifier ammeter has the following components: PMMC instrument with FSD = 200 µA and Rm = 900 N; current transformer with N, = 600 and N, = 5; diodes with VF = 0.3 V; meter series resistance R,=270 kN; transformer shunt secondary resis- tance Rį = 98.7 kN. Calculate the level of transformer primary current for instru- ment FSD. 3-25 Calculate the sensitivity of the ac voltmeter in Example 3-11 when diode D2 is (a) included in the circuit and (b) omitted from the circuit. 3-26) A PMMC instrument with 250 µA FSD has a specified accuracy of ±2%. Calculate the measurement accuracy at currents of 200 uA and 100 HA.
Transcribed Image Text:3-24 A rectifier ammeter has the following components: PMMC instrument with FSD = 200 µA and Rm = 900 N; current transformer with N, = 600 and N, = 5; diodes with VF = 0.3 V; meter series resistance R,=270 kN; transformer shunt secondary resis- tance Rį = 98.7 kN. Calculate the level of transformer primary current for instru- ment FSD. 3-25 Calculate the sensitivity of the ac voltmeter in Example 3-11 when diode D2 is (a) included in the circuit and (b) omitted from the circuit. 3-26) A PMMC instrument with 250 µA FSD has a specified accuracy of ±2%. Calculate the measurement accuracy at currents of 200 uA and 100 HA.
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