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Overvoltage Protective Circuit

IP.com Disclosure Number: IPCOM000098793D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Essinger, P: AUTHOR

Abstract

This protective circuit utilizes a controlled silicon rectifier CR1 connected across the output from a series regulator in a power supply to clamp the voltage applied to a load circuit to ground upon the occurrence of an overvoltage.

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Overvoltage Protective Circuit

This protective circuit utilizes a controlled silicon rectifier CR1 connected across the output from a series regulator in a power supply to clamp the voltage applied to a load circuit to ground upon the occurrence of an overvoltage.

A Zener diode D1 is connected across the input to the load circuit by a voltage divider comprising resistors R2, R3 and adjustable R5 so as to determine the overvoltage at which the rectifier R1 is triggered to conduct. A circuit breaker CB having an overcurrent try winding T opens the circuit when the rectifier CR1 conducts. Resistor R4 limits the current when CR1 conducts.

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