Contents
Document Release History ................................................................................................................................. 2
Software Revision History .................................................................................................................................. 2
Section 1: Introduction ....................................................................................................................................... 8
1.2 E
R
..................................................................................................................................... 8
2.1 General ........................................................................................................................................... 16
2.2 Case ............................................................................................................................................... 17
2.3 Front Cover ..................................................................................................................................... 18
2.4 Power Supply Unit (PSU) ................................................................................................................. 19
2.6 Current Inputs.................................................................................................................................. 23
2.7 Voltage Inputs ................................................................................................................................. 23
2.8 Binary Inputs ................................................................................................................................... 23
2.11 Self Monitoring ................................................................................................................................ 26
2.11.1
Section 3: Protection Functions ........................................................................................................................ 28
3.1 Differential Protection ....................................................................................................................... 28
3.1.1
3.1.2
3.1.3
3.2 Inter-Trip Elements .......................................................................................................................... 31
3.2.1
3.2.2
3.3.1
3.3.2
3.3.3
3.3.4
3.4.1
3.4.2
3.4.3
3.5.1
3.5.2
3.5.3
4.1 Auto-Reclose (79) ............................................................................................................................ 49
4.1.1
Overview............................................................................................................................ 49
4.1.2
Auto Reclose sequences .................................................................................................... 51
4.2 Autoreclose Prot'n Menu .................................................................................................................. 52
4.3 Autoreclose Config Menu ................................................................................................................. 52
4.4 P/F Shots Sub-Menu........................................................................................................................ 54
Unrestricted ©2018 Siemens Protection Devices Limited
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7SR18 Description Of Operation
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