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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
2.2
Configuration
2.3
Phase-Fault
and
Earth-fault
Overcurrent
2.4
Sensitive Earth-fault and
Restricted Earth-fault
2.5
Circuit Breaker Fail
2.6
Cold Load Protection
2.7
Directional
2.8
Voltage Protection
2.9
Auto-reclose
2.10
Trip Circuit Supervision
2.11
Status Inputs and
Relay Outputs
2.12
Communications
2.13
Data Storage
2.14
Maintenance
2.15
Linesman
Notes
1.
Within Section 2: Functional Description the following notational and formatting conventions are used:
©2013 Siemens Protection Devices Limited
Principal
Setting Menus
System Config.
Configuration of Argus for system requirements: system
frequency, CT/VT ratios, identifiers, password etc.
Protection
51
50
50
50
51N
50N
50N
50N
Protection
50N
87G
Protection
50BF circuit breaker fail
System Config. +
Application of different settings group when energising a
Auto-reclose
cold load.
Directional
67
67N
Voltage
27/59 undervoltage/overvoltage protection
Auto-reclose
79
Status Config.
74TC trip circuit supervision
Status Config. +
Pick-up and drop-off timers, inversion, latching and
O/P Relay Config.
minimum energise time.
Communications
Communication with PC or control system.
Data Storage
Event, fault and waveform records.
CB Maintenance
Assistance for maintenance of circuit breakers, protection
schemes and the Argus relay.
Linesman Mode
Enables easy enabling/disabling of protection and auto-
reclosing for line work.
7SG11 Argus Technical Reference
Description
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)
sensitive earth-fault, or
restricted earth-fault
phase-fault directional overcurrent
earth-fault directional overcurrent
auto-reclose
P20007 Page 21 of 71
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