Siemens 7SR224 Technical Manual page 89

Section 4: Control Functions .................................................................................................................................. 47
4.1 Check Synchronising ............................................................................................................................ 47
4.1.1 Reference ............................................................................................................................... 47
4.1.2 Live/Dead Line/Bus Detector Elements .................................................................................. 47
4.1.3 Line and Bus Undervoltage Elements..................................................................................... 47
4.1.4 Voltage Difference .................................................................................................................. 48
4.1.5 General Autoreclose Timers ................................................................................................... 48
4.1.6 CS/SS/COZ Line and Bus Phase Angle Difference ................................................................ 48
4.1.7 CS/SS/COZ Slip Frequency.................................................................................................... 48
4.1.8 CS/SS Timer ........................................................................................................................... 48
4.1.9 Split Angle Detector ................................................................................................................ 48
4.1.10 Split Slip Frequency Detector.................................................................................................. 48
4.2 Loss of Voltage (LOV) Loop Automation Function ................................................................................ 49
4.2.1 Reference (LOV-A/X Dead/Live )............................................................................................ 49
4.2.2 Operate and Reset Level ........................................................................................................ 49
4.2.3 Reference LOV Automation Timers ........................................................................................ 49
4.2.4 Operate Time LOV Automation Timers................................................................................... 49
List of Figures
Figure 1-1 Binary Input Configurations Providing Compliance with EATS 48-4 Classes
ESI 1 and ESI 2 .................................................................................................................10
Figure 2-1 Thermal Overload Protection Curves ................................................................................22
Figure 2-2 IEC IDMTL Curves (Time Multiplier=1)..............................................................................30
Figure 2-3 ANSI IDMTL Operate Curves (Time Multiplier=1) .............................................................31
Figure 2-4 ANSI Reset Curves (Time Multiplier=1).............................................................................32
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7SR224 Argus Performance Specification
Chapter 3 Page 4 of 49