7SG11 Argus Technical Reference
©2013 Siemens Protection Devices Limited
P20007 Page 20 of 71
Section 2: Functional Description
2.1 Introduction
The Argus overcurrent relays incorporate a range of protection elements and functions that, together with the
integrated control, automation, display and communication functions, provide comprehensive protection for
application in distribution substations or backup protection on transmission feeders.
The protective functions that can be provided are shown in Figure 2.1-1, together with the analogue and digital
input signals and outputs.
67N
earth-fault directional
overcurrent
ph C
ph B
27 / 59
undervoltage / overvoltage
ph C
ph B
ph C
ph B
51
phase-fault time delayed
overcurrent (charact.)
ph A
ph C
ph B
50
phase-fault instantaneous
overcurrent (lowset)
ph A
ph C
ph B
50
phase-fault instantaneous
overcurrent (highset 1)
ph A
50
phase-fault instantaneous
overcurrent (highset 2)
ph A
51N
earth-fault time delayed
overcurrent (charact.)
E
50N
earth-fault instantaneous
overcurrent (lowset)
E
50N
earth-fault instantaneous
overcurrent (highset 1)
E
50N
earth-fault instantaneous
overcurrent (highset 2)
E
50N / 87G
sensitive earth-fault /
restricted earth-fault
SE/RE
79
autoreclose
74TC
trip circuit supervision
ph C
ph B
67
phase-fault directional
overcurrent
ph A
E
IA
IB
IC
IE
ISE
ph A
VAB / VA
VBC / VB
VCA / VC
VBC
VCA
VAB
P/F Charact Inhibit
P/F Lowset Inhibit
P/F Highset 1 Inhibit
P/F Starter
P/F Charact.
P/F Lowset
P/F Highset 1
P/F Highset 2
V Starter
V Block Alarm
V Trip
E/F Starter
E/F Charact.
E/F Lowset
E/F Highset 1
E/F Highset 2
SEF/REF Starter
SEF/REF Lowset
SEF/REF Delay 1
SEF/REF Delay 2
E/F Charact Inhibit
E/F Lowset Inhibit
E/F Highset 1 Inhibit
E/F Highset 2 Inhibit
SEF Lowset Inhibit
SEF Delay 1 Inhibit
SEF Delay 2 Inhibit
E/F FWD Block
E/F REV Block
P/F FWD Block
P/F REV Block
50BF
circuit breaker fail
CB Fail 1
CB Fail 2
IE (ISE)
VN
P/F Highset 2 Inhibit
Trip Circuit Fail
Fault Trigger
Lockout Alarm
Close Pulse
AUX Close
ARC Active
Reclaimed
SA Blocked
SA Alarm
SA Trip
CB Open
CB Closed
Reclose Block
P/F ARC Off
E/F ARC Off
SEF/REF ARC Off
ARC Status A
Trip & ARC
Close & Lockin
Trip & Lockout
Close & Reclaim
Hot Line Working
P300008 Protection Functions / Overall
Argus 2 and Argus 6 only
Argus 2 type II only
Argus 2 and Argus 6 only
Argus 4 and Argus 6 only
50 CTF
current transformer failure
CT Failure
IA
IB
IC
SEF Lowset Inhibit
E/F Lowset Inhibit
P/F Lowset Inhibit
P/F, E/F & SEF Protection Element output data
Figure 2.1-1
Overview of Argus Relay Protection Functions
Scaled analogue inputs are derived via input transformers. Control/inhibit input signals and output relays can be
user mapped to be raised from any one, or more, status inputs; similarly, protection, alarm and control element
outputs can be user mapped to output relays. The user can thus create an individual Input/Output matrix
mapping specific to each installation. Each status input can be set to be inverted and/or latched and have pick-up
and drop-off delay times set. Each output relay may be individually set to be latched (Hand Reset).
The flexibility of this input/output mapping coupled to the Protection and Control functions and Settings Group
selection enables users to integrate scheme functions into the ARGUS Relay to produce a sophisticated
protective device
Each of the functions shown in Figure 2.1-1 is described in the relevant sections below.
