
7SG11 Argus Technical Reference
©2013 Siemens Protection Devices Limited
P20007 Page 13 of 71
Attribute
Value
retrip
t
CBF1
, 1 % or 10 ms
Operating time
backtrip
t
CBF1
+
t
CBF2
, 1 % or 10 ms
Repeatability
1 % 10 ms
Overshoot time
< 40 ms
Disengaging time
< 42 ms
1.4.6 Auto-reclose
Integrated with the Overcurrent, Low Set, Delay and High Set 1 and High Set 2 elements.
Attribute
Value
Number of reclose shots
up to 4(separate for phase-fault, earth-fault, SEF and external)
Timers
Reclose DTL 1, 2, 3, 4; Reclaim time
(separate for phase-fault, earth-fault, SEF and external)
Timer ranges
0.20, 0.21…2.0, 2.1…20, 21…300, 360…
3600, 3900…14400 s
Time accuracy, all timers
setting 1 % or 10 ms
Repeatability
1 %
1.4.7 Instrumentation
Voltage, power and power factor instruments are available on Argus 2 type II models only.
Instrument Value
Reference
Typical accuracy Claimed accuracy
I
Current
I
0.1 x
In
1 %
In
3 %
In
V
Voltage
V
0.8 x
Vn
1 %
Vn
3 %
Vn
Power, real and apparent
V = Vn, I
0.1 x
In, pf
0.8
3 %
Pn
, where
Pn
=
Vn
x
In
pf
Power factor
V = Vn, I
0.1 x
In, pf
0.8
0.05
1.4.8 Communication Interface
Attribute
Value
Physical layer
Fibre-optic (option EIA RS-485)
Connectors
ST
TM
(BFOC/2.5) (RS-485 electrical 4mm terminal)
Recommended fibre
62.5/125 m glass fibre with ST
TM
connector
Launch power (into recommended fibre)
-16 dBm
Receiver sensitivity
-24 dBm
Protocol
IEC 60870-5-103 or MODBUS RTU
‘ST’ is the registered trade mark of AT&T Co.
1.4.9 Real Time Clock
Attribute
Value
Accuracy
50 ppm (equivalent to 180 ms per hour)
1.5 Environmental Performance
1.5.1 General
1.5.1.1
Temperature
IEC 60068-2-1/2