Siemens 7SR158 Argus Technical Manual page 189

Contents
Section 1: Introduction ....................................................................................................................................... 5
1.1 Loss of Mains (LoM) .......................................................................................................................... 5
Section 2: Protection Functions .......................................................................................................................... 6
2.1 Under/Over Voltage Protection (27/59) ............................................................................................... 6
2.1.1 Under-Voltage ...................................................................................................................... 6
2.1.2 Over-Voltage ........................................................................................................................ 6
2.2 Negative Phase Sequence Overvoltage (47) ...................................................................................... 7
2.3 Neutral Overvoltage (59N) ................................................................................................................. 7
2.3.1 Application with Capacitor Cone Units ................................................................................... 8
2.3.2 Derived Neutral Voltage........................................................................................................ 8
2.4 Vector Shift (78)................................................................................................................................. 9
2.5 Under/Over Frequency (81).............................................................................................................. 10
2.6 Rate-of-Change-of-Frequency (81R) ................................................................................................ 11
2.6.1 Loss of Mains (LOM) .......................................................................................................... 11
2.6.2 Load Shedding ................................................................................................................... 11
Section 3: Control Functions ............................................................................................................................ 13
3.1 Quick Logic Applications .................................................................................................................. 13
3.1.1 Auto-Changeover Scheme Example ................................................................................... 13
Section 4: Supervision Functions ...................................................................................................................... 14
4.1 Trip/Close Circuit Supervision (74T/CCS) ......................................................................................... 14
4.1.1 Trip Circuit Supervision Connections ................................................................................... 14
4.1.2 Close Circuit Supervision Connections ................................................................................ 16
4.2 Circuit-Breaker Maintenance ............................................................................................................ 17
Section 5: Common Functions .......................................................................................................................... 18
5.1 Binary Inputs ................................................................................................................................... 18
5.1.1 Alarm and Tripping Inputs ................................................................................................... 18
5.1.2 The Effects of Capacitance Current .................................................................................... 19
5.1.3 AC Rejection ...................................................................................................................... 19
5.1.4 Use of Binary Inputs in control and tripping circuits .............................................................. 21
5.2 Binary Outputs ................................................................................................................................. 23
5.3 LED's .............................................................................................................................................. 24
©2014 Siemens Protection Devices Limited
Chapter 7) 7SR158 Applications Guide
Chapter 7) Page 3 of 24