Siemens 7SR45 Argus User Manual page 111

Contents
Section 1: Current Transformer Requirements .................................................................................................... 3
1.1 Time Delayed Overcurrent (51/51G/51N) ............................................................................................ 7
1.2 Selection of Overcurrent Characteristics ............................................................................................. 8
1.2.1 Reset Delay ......................................................................................................................... 9
1.3 Instantaneous Overcurrent (50/50G/50N) ......................................................................................... 10
List of Figures
Figure 1-1 Burden of the Relay for Different Currents ..................................................................................... 5
Figure 1-2 IEC NI Curve with Time Multiplier and Follower DTL Applied.......................................................... 7
Figure 1-3 IEC NI Curve with Minimum Operate Time Setting Applied ............................................................ 8
Figure 1-4 Reset Delay ................................................................................................................................. 9
Figure 1-5 General Form of DTL Operate Characteristic ............................................................................... 10
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Chapter 7 - 7SR45 Applications Guide
Chapter 7 Page 2 of 10