7SG11 Argus 8 Performance Specification
1 General
The relay complies with the relevant clauses in the following specification :-
•
IEC 60255 - 3
2 Characteristic Energizing Quantity
AC Voltage Vn
63.5 / 110 Vrms
Frequency
50 / 60Hz
3 Auxiliary Energising Quantity
3.1 DC Power Supply
Nominal
Operating
Range
V
AUX
24, 30, 48V
18V to 60V dc
V
AUX
110, 220V
88V to 280V dc
3.2 DC Status Inputs
Nominal Voltage
Operating Range
30 / 34
18V to 37.5V
48 / 54
37.5V to 60V
110 / 125
87.5V to 137.5V
220 / 250
175 to 280V
NB : the status operating voltage need not be the same as the main energising voltage. For 110/125V or
220/250V working, a standard Argus relay with 48/54V status can be supplied for use with external dropper
resistors as follows:-
Status Input External Resistances
Nominal Voltage
Resistor Value (Wattage)
110 / 125V
2k7 ± 5% ; (2.5W)
220 / 250V
8k2 ± 5% ; (6.0W)
Status Input Performance
Minimum DC current for operation
10mA
Reset/Operate Voltage Ratio
≥
90%
Typical response time
< 5ms
Typical response time when programmed to energise an
output relay contact
< 15ms
Minimum pulse duration
40ms
Each status input has associated timers which can be programmed to give time delayed pick-up and time delayed
drop-off. The drop-off timers have default settings of 20ms, thus providing immunity to an AC input signal. Status
inputs will not respond to the following:
•
250V RMS 50/60Hz applied for two seconds through a 0.1
μ
F capacitor.
•
500V RMS 50/60Hz applied between each terminal and earth.
•
Discharge of a 10
μ
F capacitor charged to maximum DC auxiliary supply voltage.
The inputs meet the requirements of ESI 48-4.
Note :
special versions of status input are available for direct operation from 110V and 220V supplies. These do
not comply with the ESI 48-4 specification and will operate with a DC current of less than 10mA.
©2010 Siemens Protection Devices Limited
Chapter 2 Page 3 of 9
