Can you explain how it came to the final answer, first picture (a) and second picture (b)? And what is the used of voltmeter sensitivity in solving the value of the multiplier resistor in series with the meter resistor? Example 3-8A PMMC instrument with FSD = 100 LA and R=1 kn is to be employed as an ac volt-meter with FSD = 100 V (ms). Silicon diodes are used in the bridge rectifier circuit ofFigure 3-17. Calculate the multiplier resistance value required.SolutionAt FSD, the average current flowing through the PMMC instrument isI.- 100 HA100 µA0.637- 157 HApeak current I.0.637(applied peak voltage) - (rectifier volt drop)total circuit resistancerectifier volt drops = 2V, (for D, and D. or Dz and D)applied peak voltage = 1.414Vmtotal circuit resistance - R, + R.1.414Vm -2V,R, +R.1.414V - 2V,--R.(1.414 x 100 V)- (2 x 0.7 V)157 HA-i k0= 890.7 kn Example 3-8A PMMC instrument with FSD = 100 LA and R=1 kn is to be employed as an ac volt-meter with FSD = 100 V (ms). Silicon diodes are used in the bridge rectifier circuit ofFigure 3-17. Calculate the multiplier resistance value required.SolutionAt FSD, the average current flowing through the PMMC instrument isI- 100 HApeak current I-L- 100 A0.637- 157 HA0.637(applied peak voltage) - (rectifier volt drop)total circuit resistancerectifier volt drops = 2V, (for D, and D. or Dz and D)applied peak voltage = 1.414Vmtotal circuit resistance - R, + R.1.414Vm -2V,R, + R.1.414Vm - 2V,R,-- R.(1.414 x 100 V)-(2x0.7 V)157 A-i k0= 890.7 kn

To extend the voltage and current setting of an instrument Extenal arrangement are made. To…

Example 3-8 A PMMC instrument with FSD= 100 HA and R. -1 kn is to be employed as an ac va meter with FSD = 100 V (ms). Silicon diodes are used in the bridge rectifier circuit Figure 3-17. Calculate the multiplier resistance value required. Solution At FSD, the average current flowing through the PMMC instrument is I- 100 HA peak current la" 0.637 100 A 0.637 157 A L- Capplied peak voltage) - (rectifier volt drop) total circuit resistance rectifier volt drops - 2V, (for D, and D, or D, and D) applied peak voltage - 1.414Vm total eircuit resistance - R, + R. 1414V,m- 2V, R, + R. 1.414Vm -2V, (1414 x 100 V)-(2 x0.7 V) 157 A - I ko 890.7 kn

Example 3-8 A PMMC instrument with FSD= 100 HA and R. -1 kn is to be employed as an ac va meter with FSD = 100 V (ms). Silicon diodes are used in the bridge rectifier circuit Figure 3-17. Calculate the multiplier resistance value required. Solution At FSD, the average current flowing through the PMMC instrument is I- 100 HA peak current la" 0.637 100 A 0.637 157 A L- Capplied peak voltage) - (rectifier volt drop) total circuit resistance rectifier volt drops - 2V, (for D, and D, or D, and D) applied peak voltage - 1.414Vm total eircuit resistance - R, + R. 1414V,m- 2V, R, + R. 1.414Vm -2V, (1414 x 100 V)-(2 x0.7 V) 157 A - I ko 890.7 kn

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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