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NA10 - Manual - 04 - 2022
4 FUNCTION CHARACTERISTICS 22
4.1 HARDWARE DESCRIPTION .............................................................................................................................................................................22
Power supply board ..................................................................................................................................................................................... 23
CPU board ...................................................................................................................................................................................................... 23
Input board .................................................................................................................................................................................................... 23
MMI (keyboard, LED and display) ............................................................................................................................................................. 23
4.2 SOFTWARE DESCRIPTION ..............................................................................................................................................................................24
Base software ................................................................................................................................................................................................24
Real-time operating system .........................................................................................................................................................................24
Task ..................................................................................................................................................................................................................24
Drivers .............................................................................................................................................................................................................25
Application Software ....................................................................................................................................................................................25
Data Base .......................................................................................................................................................................................................25
Self test (Application) ...................................................................................................................................................................................25
Development tools (Builder) ........................................................................................................................................................................25
4.3 I/O DESCRIPTION ..............................................................................................................................................................................................26
Metering inputs .............................................................................................................................................................................................26
Signal processing ..........................................................................................................................................................................................26
Conventions ................................................................................................................................................................................................... 29
Use of measured values .............................................................................................................................................................................. 30
Binary inputs ..................................................................................................................................................................................................31
Output relays ..................................................................................................................................................................................................36
LED indicators ............................................................................................................................................................................................... 38
Communication interfaces .......................................................................................................................................................................... 40
4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................41
Rated values ...................................................................................................................................................................................................41
Thermal protection with RTD thermometric probes - 26 ....................................................................................................................... 43
Phase overcurrent - 50/51 ............................................................................................................................................................................45
Residual overcurrent - 50N/51N .................................................................................................................................................................55
Breaker failure - BF .......................................................................................................................................................................................65
4.5 CONTROL AND MONITORING ........................................................................................................................................................................67
Logical block - BLOCK1 ................................................................................................................................................................................67
Selective block -BLOCK2 ............................................................................................................................................................................ 69
Remote tripping .............................................................................................................................................................................................74
Frequency tracking .......................................................................................................................................................................................75
Second Harmonic Restraint - 2ndh-REST .................................................................................................................................................76
Cold Load Pickup - CLP ................................................................................................................................................................................77
CT supervision - 74CT .................................................................................................................................................................................. 78
Trip circuit supervision - 74TCS.................................................................................................................................................................. 79
Circuit breaker supervision .........................................................................................................................................................................82
Virtual I/O ........................................................................................................................................................................................................84
Demand measures ........................................................................................................................................................................................87
Oscillography ................................................................................................................................................................................................87
5 MEASURES, LOGIC STATES AND COUNTERS 88
Measures ....................................................................................................................................................................................................... 88
Protection ...................................................................................................................................................................................................... 88
Delayed inputs .............................................................................................................................................................................................. 88
Internal states ............................................................................................................................................................................................... 88
Relays ............................................................................................................................................................................................................. 89
Counters ......................................................................................................................................................................................................... 89
Self test .......................................................................................................................................................................................................... 89
Pilot wire diagnostic .................................................................................................................................................................................... 90
Selective Block - BLOCK2 ........................................................................................................................................................................... 90
Fault recording - SFR ................................................................................................................................................................................... 90
Event recording - SER .................................................................................................................................................................................. 90
Oscillography - DFR ......................................................................................................................................................................................91
6 INSTALLATION 93
6.1 PACKAGING ...................................................................................................................................................................................................... 93
6.2 MOUNTING ....................................................................................................................................................................................................... 93
6.3 ELECTRICAL CONNECTIONS ..........................................................................................................................................................................97
6.4 NOMINAL CURRENT I
n
AND I
En
SETTING ................................................................................................................................................107
6.5 LED ALLOCATION ........................................................................................................................................................................................... 110
6.6 FINAL OPERATIONS ...................................................................................................................................................................................... 110
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