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Device Functionality
2.4 External Trip Input
2.4
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
Parameters
Inhibit 50-1
Inhibit 50-2
Inhibit 51-1
Inhibit 50N-1
Inhibit 50N-2
Inhibit 51N-1
Inhibit 50LC
Inhibit 81HBL2
Select Group 1
Select Group 2
Rst LEDs & O/Ps
Trip Pulse O/P
Local Mode
Remote Mode
Local or Remote Mode
Out of Service Mode
24
External Trip Initiation Input Details
Description
50-1 element block
50-2 element block
51-1 element block
50N-1 element block
50N-2 element block
51N-1 element block
50LC/SOTF element block X
Inrush current element
block
Select group 1
Select group 2
Reset LEDs and BOs
Pulse output
Local mode
Remote mode
Local or remote mode
Out-of-service mode
Default Value Min
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
–
–
X
X
X
X
X
X
X
X
C53000-G7040-C103-1, Edition 10.2022
Max
Step Change
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
–
X
X
X
X
X
X
X
X
Reyrolle, 7SR46 Device, Manual
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