Voltage Difference; General Autoreclose Timers; Cs/Ss/Coz Line And Bus Phase Angle Difference; Cs/Ss/Coz Slip Frequency - Siemens 7SR224 Technical Manual

4.1.4

Voltage Difference

Attribute
V Operate level
op
Reset level
Repeatability
4.1.5

General Autoreclose Timers

Attribute
t Element basic operate time
basic
t t /t /t
op dlc dbc cw
Repeatability
4.1.6

CS/SS/COZ Line and Bus Phase Angle Difference

Attribute
θ
Operate angle
op
Reset angle
Repeatability
4.1.7

CS/SS/COZ Slip Frequency

Attribute
f Operate frequency
op
Reset frequency
Repeatability
4.1.8

CS/SS Timer

Attribute
t Operate time
op
Note: minimum synchronising time following restoration of voltage from a dead condition is 320ms.
4.1.9

Split Angle Detector

Attribute
θ
Operate angle
op

4.1.10 Split Slip Frequency Detector

Attribute
f Operate frequency
op
Reset frequency
Repeatability
©2010 Siemens Protection Devices Limited
7SR224 Argus Performance Specification
Value
, ± 1 % V
100 % V
diff n
≥ V
– 4%
op
± 2 %
Value
20ms ±20ms
t + t ±1%
op basic
±20ms
Value
θ
, ±1 º
diff
θ
, ±1 º
op
± 1 º
Value
f , ± 10 mHz
slip
f , - 10 mHz
op
± 10 mHz
Value
±1 º, +20ms
Value
θ
, ± 1 °
split
Value
f , ± 10 mHz
slip
f , - 10 mHz
op
± 10 mHz
Chapter 3 Page 48 of 49