External Trip Input
Overview
The External Trip Input (ETI) is an electrically isolated contact. The ETI works only on Healthy CT current/auxil-
iary power supply. The ETI is a scanning input which is OFF for 5 s and ON for 1 s. Any contact change during
ON time is detected by the relay.
The status of ETI can be viewed via LCD or Reydisp Evolution software or SCADA.
The 7SR46 Argus relay is equipped with 1 external trip input. You can assign the external trip input to Trip
Pulse O/P and general alarm functions under INPUT CONFIG ▶ INPUT MATRIX.
The external trip input has a fixed pickup time of 50 ms after the contacts are closed. External trip input can be
assigned to any binary output and programmable LEDs. It allows the relay to provide panel indications and
alarms.
External Trip Input Logic
External Trip Input Details
External trip input can be mapped only to Trip Pulse O/P and General Alarms. A X appears in the HMI for all
other functions. In Reydisp Evolution, configuraiton for these functions is disabled.
Table 2-6
External Trip Initiation Input Details
Parameters Description Default Value Min Max Step Change
Inhibit 50-1 50-1 element block X X X X
Inhibit 50-2 50-2 element block X X X X
Inhibit 51-1 51-1 element block X X X X
Inhibit 50N-1 50N-1 element block X X X X
Inhibit 50N-2 50N-2 element block X X X X
Inhibit 51N-1 51N-1 element block X X X X
Inhibit 50LC 50LC/SOTF element block X X X X
Inhibit 81HBL2 Inrush current element
block
X X X X
Select Group 1 Select group 1 X X X X
Select Group 2 Select group 2 X X X X
Rst LEDs & O/Ps Reset LEDs and BOs X X X X
Trip Pulse O/P Pulse output – – 1 –
Local Mode Local mode X X X X
Remote Mode Remote mode X X X X
Local or Remote Mode Local or remote mode X X X X
Out of Service Mode Out-of-service mode X X X X
2.4
Device Functionality
2.4 External Trip Input
24 Reyrolle, 7SR46 Device, Manual
C53000-G7040-C103-1, Edition 10.2022
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