Siemens 7SR242 Duobias Technical Manual page 258

2.11 Under/Over Frequency (81) ................................................................................................ 46
2.12 Overfluxing (24).................................................................................................................. 48
2.12.1 definite time (24DT) ............................................................................................... 48
2.12.2 inverse time (24IT) ................................................................................................. 49
Section 3: Supervision Functions .................................................................................................. 51
3.1 CB Fail (50BF) ................................................................................................................... 51
3.2 Trip/Close Circuit Supervision (74TCS, 74CCS) ............................................................... 53
3.3 Magnetising Inrush Detector (81HBL2) ............................................................................. 54
3.4 Overfluxing Detector (81HBL5) ......................................................................................... 56
Section 4: Control & Logic Functions ............................................................................................ 57
4.1 Quick Logic ........................................................................................................................ 57
Section 5: Testing and Maintenance .............................................................................................. 59
5.1 Periodic Tests .................................................................................................................... 59
5.2 Maintenance ...................................................................................................................... 59
5.3 Troubleshooting ................................................................................................................. 60
Section 6: Relay Software Upgrade Instructions ........................................................................... 61
6.1 General .............................................................................................................................. 61
6.2 Replacing firmware on a product installed on site ............................................................... 61
6.2.1 Identify Which Software Is Currently Loaded .......................................................... 61
6.2.2 Overall Software Information .................................................................................. 61
6.2.3 Product Configuration Information .......................................................................... 61
6.2.4 Things To Do Before Loading New Firmware/Software........................................... 62
6.2.5 Loading Firmware using front USB port .................................................................. 62
6.2.6 Solving Software Upload Problems ........................................................................ 62
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Chapter 6) 7SR242 Duobias Commissioning & Maintenance Guide
Chapter 6 Page 4 of 62