7SG11 Argus 8 Performance Specification
6.2 Undervoltage Element
Undervoltage Element
Operate Level Setting ± 1% or 0.25V
Reset Level
≤ (operate level + hysteresis setting)
Operate Time (see Fig.2)
1.1x to 0.9x setting
≤ 65ms
Reset Time
0V to 1.1x setting
≤ 75ms
0V to 2x setting
≤ 65ms
6.3 Neutral Voltage Element
Neutral Voltage Element
Operate Level Setting ± 1% or 0.25V
Reset Level
> 95% of operate value
1
Operate Time
0V to 2x setting
≤ 85ms
0V to 1.1x setting
≤ 85ms
Reset Time
1.1x to 0.9x setting
≤ 80ms
1.1x to 0V
≤ 70ms
1
– For NVD settings below 7.5V the Reset Level can be up to 60% of operate value.
6.4 NPS Overvoltage Element
Negative Phase Sequence Element
Operate Level Setting ± 1% or 0.25V
Reset Level > 95% of operate value
2
Operate Time
0V to 2x setting
≤ 85ms
0V to 1.1x setting
≤ 85ms
Reset Time
1.1x to 0.9x setting
≤ 80ms
1.1x to 0V
≤ 70ms
2
– For NPS settings below 3.5V the Reset Level can be up to 80% of operate value.
6.5 Overfrequency Element
Overfrequency 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
©2011 Siemens Protection Devices Limited Chapter 2 Page 5 of 9
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