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Chapter 7) 7SR158 Applications Guide
List of Figures
Figure 2.3-1 Neutral Overvoltage Application ..................................................................................................... 7
Figure 2.3-2 Neutral Overvoltage Protection Connections ................................................................................... 8
Figure 2.4-1 Vector Shift .................................................................................................................................... 9
Figure 2.5-1 Load Shedding Scheme Using Under-Frequency Elements ........................................................... 10
Figure 2.6-1 Use of ROCOF elements.............................................................................................................. 11
Figure 3.1-1 Quick Logic Example ................................................................................................................... 13
Figure 4.1-1 Trip Circuit Supervision Scheme 1 (H5) ........................................................................................ 14
Figure 4.1-2 Trip Circuit Supervision Scheme 2 (H6) ........................................................................................ 15
Figure 4.1-3 Trip Circuit Supervision Scheme 3 (H7) ........................................................................................ 15
Figure 4.1-4 Close Circuit Supervision Scheme ................................................................................................ 16
Figure 5.1-1 Example of Transformer Alarm and Trip Wiring ............................................................................. 18
Figure 5.1-2 Example Binary Input Configurations Providing Compliance with EATS 48-4 Classes
ESI 1 and ESI2 .......................................................................................................................... 22
Figure 5.3-1 LED configuration via the LED Matrix tab ...................................................................................... 24
Figure 5.3-2 LED configuration via the Settings \ OUTPUT CONFIG \ LED CONFIG menu ................................ 24
Chapter 7) Page 4 of 24
©2014 Siemens Protection Devices Limited
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