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LM1851 Datasheet Ground Fault Interrupter

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: www.DataSheet4U.com LM1851 Ground Fault Interrupter June 1992 LM1851 Ground Fault.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The LM1851 is designed to provide ground fault protection for AC power outlets in consumer and industrial environments Ground fault currents greater than a presettable threshold value will trigger an external SCR-driven circuit breaker to interrupt the AC line and remove the fault condition In addition to detection of conventional hot wire to ground faults the neutral fault condition is also detected Full advantage of the U S UL943 timing specification is taken to insure maximum immunity to false triggering due to line noise Special

Key Features

  • include circuitry that rapidly resets the timing capacitor in the event that noise pulses introduce unwanted charging currents and a memory circuit that allows firing of even a sluggish breaker on either half-cycle of the line voltage when external full-wave rectification is used Features Y Y Y Y Y Y Internal power supply shunt regulator Externally programmable fault current threshold Externally programmable fault current integration time Direct interface to SCR Operates under line reversal b.

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