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SME2-IS - Manual - 06- 2021
Automation functions................................................................................................................................................................................... 18
Hot Line Tag function ................................................................................................................................................................................... 18
Automatic reclosing - 79 ............................................................................................................................................................................. 18
Synchrocheck relay - 25 ............................................................................................................................................................................. 18
3.8 MONITORING AND CONTROL FUNCTIONS ................................................................................................................................................ 19
Oscillograph ................................................................................................................................................................................................. 19
3.9 MEASUREMENTS ............................................................................................................................................................................................ 19
Measurements .............................................................................................................................................................................................. 19
Fault recording ...............................................................................................................................................................................................21
Event recording .............................................................................................................................................................................................21
Measurement logging ..................................................................................................................................................................................21
GD measurement recording .......................................................................................................................................................................21
4 FUNCTIONAL CHARACTERISTICS 22
4.1 HARDWARE .......................................................................................................................................................................................................22
4.2 SOFTWARE ........................................................................................................................................................................................................ 23
Basic software .............................................................................................................................................................................................. 23
Real-time operating system ........................................................................................................................................................................ 23
Processes (task) ........................................................................................................................................................................................... 23
Drivers ............................................................................................................................................................................................................ 23
The application software ............................................................................................................................................................................ 23
Data Base ...................................................................................................................................................................................................... 23
Self test (application) ................................................................................................................................................................................... 23
4.3 CONFIGURATION AND CALIBRATION ..........................................................................................................................................................24
4.4 INPUTS/OUTPUTS ............................................................................................................................................................................................25
Measurement inputs .....................................................................................................................................................................................25
Measured signal processing .......................................................................................................................................................................26
Measurement conventions ......................................................................................................................................................................... 29
LED signals .................................................................................................................................................................................................... 30
Communications interfaces ........................................................................................................................................................................ 30
4.5 PROTECTION FUNCTIONS .................................................................................................................................................................................. 31
Type selection ................................................................................................................................................................................................31
4.6 PROTECTION FUNCTIONS .................................................................................................................................................................................. 31
Nominal values ..............................................................................................................................................................................................31
Voltage present - RVL ...................................................................................................................................................................................32
Overcurrent - 50/51 .......................................................................................................................................................................................32
Residual overvoltage - 51N ..........................................................................................................................................................................34
Ground directional overcurrent - 67N ........................................................................................................................................................35
Directional detection of intermittent ground arcs ...................................................................................................................................37
Maximum directional active power - 32P ................................................................................................................................................ 38
4.5 MONITORING AND CONTROL FUNCTIONS ................................................................................................................................................ 40
ALB frequency (automatic load balancer) protection ........................................................................................................................... 40
Second harmonic restraint - 2ndh-REST ...................................................................................................................................................42
Interface methods ........................................................................................................................................................................................ 43
Automatic reclosing (79) ..............................................................................................................................................................................45
Hot Line Tag function ....................................................................................................................................................................................47
Synchrocheck - 25 ....................................................................................................................................................................................... 48
Automatic faulty branch selection function ............................................................................................................................................ 53
GD management function ............................................................................................................................................................................55
Virtual I/O ........................................................................................................................................................................................................56
5 MEASUREMENTS, LOGICAL STATES AND COUNTERS 59
Protection status .......................................................................................................................................................................................... 60
Timed inputs .................................................................................................................................................................................................. 60
Automation functions................................................................................................................................................................................... 60
THD monitoring ............................................................................................................................................................................................. 60
Breaker monitoring ...................................................................................................................................................................................... 60
Input function statuses .................................................................................................................................................................................61
Relays .............................................................................................................................................................................................................. 61
Counters ..........................................................................................................................................................................................................61
Protection diagnostic status .......................................................................................................................................................................61
Selective block - BLOCKS ............................................................................................................................................................................62
Virtual inputs ..................................................................................................................................................................................................62
Virtual outputs ................................................................................................................................................................................................62
Fault logging - SFR ........................................................................................................................................................................................62
Event logging - SER ...................................................................................................................................................................................... 63
Measurement logging ................................................................................................................................................................................. 63
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