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Transcript
Littelfuse Startco Protection Relays Technical Note - Ground Fault GF-04 : SE-701 REMOTE RESET When a ground-fault trip occurs, the trip remains latched until the RESET switch is pressed, the remote-reset terminals are shorted, or the supply voltage is cycled. The reset circuit responds only to a momentary closure so that a jammed or shorted switch will not maintain a reset signal. Cycling the supply voltage will not reset the trip LED. Multiple SE-701 monitors can be reset simultaneously by a parallel connection of remote reset terminals 6 and 7. In this configuration, all SE-701’s can be reset using a single contact, as shown: 6 6 RS RS UNIT 1 UNIT n 7 7 Reset Switch or Normally Open Contact The equivalent circuit of the reset input is shown below. 10K 6 RS 5V To Reset Circuit 7 Maximum Low Reset Voltage = 0.5 Vdc Minimum High Reset-Release Voltage = 3.5 Vdc Maximum Output Current = 0.5 mA Minimum Reset Pulse Width = 50 ms © 2011 Littelfuse Startco www.startco.ca 1 Pub. TN-GF04, December 4, 1999
