A PPMC instrument with a 900 n coil resistance and an FSD of 75 !LA is to be used with a half-wave rectifier circuit as an ac voltmeter. Silicon diodes are used, and the minimum diode forward current is to be 80 /-LA when the instrument indicates 0.25 FSD. Calculate the shunt and multiplier resistance values required to give 200 V FSD.

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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    A PPMC instrument with a 900 n coil resistance and an FSD of 75 !LA is to be 
used with a half-wave rectifier circuit as an ac voltmeter. Silicon diodes are used, 
and the minimum diode forward current is to be 80 /-LA when the instrument indicates 0.25 FSD. Calculate the shunt and multiplier resistance values required to 
give 200 V FSD.  

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