3
NA11 - Manual - 02 - 2009
4 FUNCTION CHARACTERISTICS 26
4.1 HARDWARE DESCRIPTION .............................................................................................................................................................................26
Power supply board ......................................................................................................................................................................................27
CPU board .......................................................................................................................................................................................................27
Input board .....................................................................................................................................................................................................27
MMI (keyboard, LED and display) ..............................................................................................................................................................27
4.2 SOFTWARE DESCRIPTION ............................................................................................................................................................................. 28
Base software ............................................................................................................................................................................................... 28
Real-time operating system ........................................................................................................................................................................ 28
Task ................................................................................................................................................................................................................. 28
Drivers ............................................................................................................................................................................................................ 29
Application Software ................................................................................................................................................................................... 29
Data Base ...................................................................................................................................................................................................... 29
Self test (Application) .................................................................................................................................................................................. 29
Development tools (Builder) ....................................................................................................................................................................... 29
4.3 I/O DESCRIPTION ............................................................................................................................................................................................. 30
Metering inputs ............................................................................................................................................................................................ 30
Signal processing ......................................................................................................................................................................................... 30
Conventions ................................................................................................................................................................................................... 33
Use of measured values ...............................................................................................................................................................................34
Binary inputs ..................................................................................................................................................................................................35
Output relays ................................................................................................................................................................................................. 40
LED indicators ................................................................................................................................................................................................42
Communication interfaces ...........................................................................................................................................................................44
4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................45
Rated values ...................................................................................................................................................................................................45
Thermal protection with RTD thermometric probes (26) ........................................................................................................................47
Phase overcurrent - 50/51 ........................................................................................................................................................................... 49
Residual overcurrent - 50N/51N ................................................................................................................................................................ 59
Breaker failure - BF ...................................................................................................................................................................................... 69
4.5 CONTROL AND MONITORING ........................................................................................................................................................................71
Automatic reclosure (79) ..............................................................................................................................................................................71
Logical block - BLOCK1 ................................................................................................................................................................................75
Selective block -BLOCK2 .............................................................................................................................................................................77
Remote tripping .............................................................................................................................................................................................81
Frequency tracking .......................................................................................................................................................................................82
Second Harmonic Restraint - 2ndh-REST ................................................................................................................................................ 83
Cold Load Pickup - CLP ................................................................................................................................................................................84
CT supervision - 74CT ...................................................................................................................................................................................85
Trip circuit supervision - 74TCS...................................................................................................................................................................86
Circuit breaker supervision ........................................................................................................................................................................ 89
Demand measures ........................................................................................................................................................................................91
Oscillography ................................................................................................................................................................................................91
5 MEASURES, LOGIC STATES AND COUNTERS 92
Measures ........................................................................................................................................................................................................92
Protection .......................................................................................................................................................................................................92
Delayed inputs ...............................................................................................................................................................................................92
Internal states ................................................................................................................................................................................................92
Relays ............................................................................................................................................................................................................. 93
Counters ......................................................................................................................................................................................................... 93
Self test .......................................................................................................................................................................................................... 93
Pilot wire diagnostic .....................................................................................................................................................................................94
Selective Block - Block2 ..............................................................................................................................................................................94
Fault recording - SFR ....................................................................................................................................................................................94
Event recording - SER ...................................................................................................................................................................................94
Oscillography - DFR ......................................................................................................................................................................................94
6 INSTALLATION 97
6.1 PACKAGING .......................................................................................................................................................................................................97
6.2 MOUNTING ........................................................................................................................................................................................................97
6.3 ELECTRICAL CONNECTIONS ........................................................................................................................................................................101
6.4 NOMINAL CURRENT I
n
AND I
En
SETTING FOR TRADITIONAL CTs ......................................................................................................112
6.5 LED ALLOCATION ............................................................................................................................................................................................116
6.6 FINAL OPERATIONS .......................................................................................................................................................................................116
To Next Page
Loading...
Need help?
General
