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Contents
Section 1: Common Functions ............................................................................................................................ 5
1.1 Overview ........................................................................................................................................... 5
1.2 Before Testing ................................................................................................................................... 5
1.2.1
Safety .................................................................................................................................. 5
1.2.2
Sequence of Tests ............................................................................................................... 5
1.2.3
Test Equipment .................................................................................................................... 6
1.2.4
Use of PC to facilitate testing ................................................................................................ 6
1.2.5
Precautions .......................................................................................................................... 6
1.2.6
Applying Settings ................................................................................................................. 6
1.3 Tests ................................................................................................................................................. 7
1.3.1
Inspection ............................................................................................................................ 7
1.3.2
Secondary Injection Tests..................................................................................................... 7
1.3.3
Primary Injection Tests ......................................................................................................... 7
1.3.4
Putting into Service .............................................................................................................. 7
1.4 AC Analogue Energising Quantities .................................................................................................... 8
1.5 Binary Inputs ..................................................................................................................................... 8
1.6 Binary Outputs ................................................................................................................................... 9
1.7 Relay Case Shorting Contacts............................................................................................................ 9
Section 2: Protection Functions ........................................................................................................................ 10
2.1 Over/Under Voltage ......................................................................................................................... 11
2.1.1
Phase Under/Over Voltage (27/59) ..................................................................................... 11
2.1.2
Undervoltage Guard (27/59UVG) ........................................................................................ 12
2.1.3
NPS Overvoltage (47) ........................................................................................................ 13
2.1.4
Neutral Overvoltage (59N) .................................................................................................. 14
2.1.5
Vector Shift (78) ................................................................................................................. 16
2.2 Under/Over Frequency..................................................................................................................... 17
2.2.1
Phase Under/Over Frequency (81) ..................................................................................... 17
2.2.2
Rate of Change of Frequency (81R).................................................................................... 19
Section 3: Supervision Functions ...................................................................................................................... 21
3.1 Trip/Close Circuit Supervision (74T/CCS) ....................................................................................... 21
Section 4: Control & Logic Functions ................................................................................................................ 22
4.1 Quick Logic ..................................................................................................................................... 22
Section 5: Testing and Maintenance ................................................................................................................. 23
5.1 Periodic Tests.................................................................................................................................. 23
5.2 Maintenance .................................................................................................................................... 23
5.3 Troubleshooting ............................................................................................................................... 24
©2013 Siemens Protection Devices Limited
Chapter 6) 7SR158 Commissioning and Maintenance Guide
Chapter 6 Page 3 of 24
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