7SG11 Argus 8 Performance Specification
6.6 Underfrequency Element
Underfrequency Element
Operate Level Setting ± 10mHz
Reset Level Operate + 20mHz
Operate Time
Typically < 140ms
Maximum < 175ms
For ROCOF between 0.1-10 Hz/sec
Typically < 100ms : AG8 - 300 series only
Maximum < 150ms
6.7 DTL Timing Elements
All Timers
Timing Accuracy ±1% or 30ms
7 Accuracy General
Measuring Accuracy (50 or 60 Hz)
Phase Voltage ± 1% or 0.25V
Vo (Measured) ± 1% or 0.5V
Vo (Calculated) ± 1% or 0.5V
V2 (NPS) ± 1% or 0.5V
Frequency < ± 10mHz
8 Accuracy Influencing Factors
Temperature
Ambient Range -10°C to +55°C
Variation over range
≤ 5%
Frequency
Range 47Hz to 52Hz
57Hz to 62Hz
Setting variation
≤ 1%
Operating time variation
≤ 1%
Auxiliary DC Supply - IEC 60255-11
Allowable superimposed ac component
≤ 12% of DC voltage
Allowable breaks/dips in supply (collapse to zero from
nominal voltage)
≤ 20ms
9 Thermal Withstand
Continuous Overload
AC Voltage 250Vrms ( 353Vpk)
10 Burdens
AC Burden
AC Burden
110Vrms Input
≤ 0.1VA
63.5Vrms Input
≤ 0.05VA
DC Burden
DC Burden
Quiescent (Typical) 3 Watts
Max 10 Watts
©2011 Siemens Protection Devices Limited Chapter 2 Page 6 of 9
To Next Page
Loading...
