Section 2: Functional Description; Introduction - Siemens 7SG11 Manual

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.
51
phase-fault time delayed
IA
IB
overcurrent (charact.)
IC
P/F Charact Inhibit
50
phase-fault instantaneous
overcurrent (lowset)
P/F Lowset Inhibit
50
phase-fault instantaneous
overcurrent (highset 1)
P/F Highset 1 Inhibit
50
phase-fault instantaneous
overcurrent (highset 2)
P/F Highset 2 Inhibit
67
VBC
phase-fault directional
VCA
VAB
Argus 2 and Argus 6 only
27 / 59
VAB / VA
undervoltage / overvoltage
VBC / VB
VCA / VC
Argus 2 type II only
50BF
Fault Trigger
74TC
Trip Circuit Fail
trip circuit supervision
50 CTF
IA
current transformer failure
IB
IC
Figure 2.1-1
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.
©2013 Siemens Protection Devices Limited
P/F Starter
P/F Charact.
ph A
ph B
ph C
P/F Lowset
ph A
ph B
ph C
P/F Highset 1
ph A
ph B
ph C
P/F Highset 2
ph A
ph B
ph C
P/F FWD Block
P/F REV Block
overcurrent
ph A
ph B
ph C
V Starter
V Trip
V Block Alarm
ph A
ph B
ph C
CB Fail 1
circuit breaker fail
CB Fail 2
CT Failure
Overview of Argus Relay Protection Functions
7SG11 Argus Technical Reference
51N
earth-fault time delayed
IE
overcurrent (charact.)
E/F Charact Inhibit
50N
earth-fault instantaneous
overcurrent (lowset)
E/F Lowset Inhibit
50N
earth-fault instantaneous
overcurrent (highset 1)
E/F Highset 1 Inhibit
50N
earth-fault instantaneous
overcurrent (highset 2)
E/F Highset 2 Inhibit
50N / 87G
sensitive earth-fault /
ISE
restricted earth-fault
SEF Lowset Inhibit
SEF Delay 1 Inhibit
SEF Delay 2 Inhibit
67N
IE (ISE)
earth-fault directional
VN
overcurrent
P/F, E/F & SEF Protection Element output data
79
CB Open
autoreclose
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
E/F Starter
E/F Charact.
E
E/F Lowset
E
E/F Highset 1
E
E/F Highset 2
E
SEF/REF Starter
SEF/REF Lowset
SEF/REF Delay 1
SEF/REF Delay 2
SE/RE
E/F FWD Block
E/F REV Block
E
Argus 2 and Argus 6 only
P/F Lowset Inhibit
E/F Lowset Inhibit
SEF Lowset Inhibit
Lockout Alarm
Close Pulse
AUX Close
ARC Active
Reclaimed
SA Blocked
SA Alarm
SA Trip
Argus 4 and Argus 6 only
P300008 Protection Functions / Overall
P20007 Page 20 of 71