7SG11 Argus Technical Reference
©2013 Siemens Protection Devices Limited
P20007 Page 21 of 71
2.1.1 Models
A variety of Argus overcurrent protection models is available. Different combinations of the functions shown in
Figure 2.1-1 are provided in each model to achieve different protective requirements.
Four series of relays are provided within the range:
Argus 1 – overcurrent protection
Argus 2 – directional overcurrent protection
Argus 4 – overcurrent protection and integrated autoreclose
Argus 6 – directional overcurrent protection and integrated autoreclose
Two types of current input circuits are used in the Argus range. One is used for phase-fault (P/F) and earth-fault
(E/F) protection. The second type provides harmonic filtering and is used for sensitive earth-fault (SEF) and
restricted earth-fault (REF) protection.
Two types of directional/voltage inputs are used in the Argus 2 series. Type I provides a fixed set of characteristic
angles; type II allows any angle to be set and provides a voltage protection element and voltage and power
measurands. Argus 6 series relays all have a type I voltage input.
The Diagrams and Parameters document for each series lists explicitly the functions that are provided within each
model.
2.1.2 Document Organisation
The remainder of Section 2: Functional Description is organised as follows:
Table 2-1
Overview of Functional Description Sections
Section
Principal
Setting Menus
Description
2.2 Configuration
System Config.
Configuration of Argus for system requirements: system
frequency, CT/VT ratios, identifiers, password etc.
2.3 Phase-Fault
and
Earth-fault
Overcurrent
Protection
51
50
50
50
51N
50N
50N
50N
phase-fault time delayed overcurrent (charact.)
phase-fault instantaneous overcurrent (lowset)
phase-fault instantaneous overcurrent (highset 1)
phase-fault instantaneous overcurrent (highset 2)
earth-fault time delayed overcurrent (charact.)
earth-fault instantaneous overcurrent (lowset)
earth-fault instantaneous overcurrent (highset 1)
earth-fault instantaneous overcurrent (highset 2)
2.4 Sensitive Earth-fault and
Restricted Earth-fault
Protection
50N
87G
sensitive earth-fault, or
restricted earth-fault
2.5 Circuit Breaker Fail
Protection
50BF circuit breaker fail
2.6 Cold Load Protection
System Config.
+
Auto-reclose
Application of different settings group when energising a
cold load.
2.7 Directional
Directional
67
67N
phase-fault directional overcurrent
earth-fault directional overcurrent
2.8 Voltage Protection
Voltage
27/59 undervoltage/overvoltage protection
2.9 Auto-reclose
Auto-reclose
79 auto-reclose
2.10 Trip Circuit Supervision
Status Config.
74TC trip circuit supervision
2.11 Status Inputs and
Relay Outputs
Status Config.
+
O/P Relay Config.
Pick-up and drop-off timers, inversion, latching and
minimum energise time.
2.12 Communications
Communications
Communication with PC or control system.
2.13 Data Storage
Data Storage
Event, fault and waveform records.
2.14 Maintenance
CB Maintenance
Assistance for maintenance of circuit breakers, protection
schemes and the Argus relay.
2.15 Linesman
Linesman Mode
Enables easy enabling/disabling of protection and auto-
reclosing for line work.
Notes
1.
Within Section 2: Functional Description the following notational and formatting conventions are used: