TABLE OF CONTENTS
3
NG10 - Manual - 04 - 2022
Accuracy (type tests)....................................................................................................................................................................................21
Measures ........................................................................................................................................................................................................21
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
Polarity reversal ........................................................................................................................................................................................... 30
Use of measured values ...............................................................................................................................................................................31
Binary inputs ..................................................................................................................................................................................................32
Output relays ..................................................................................................................................................................................................37
LED indicators ............................................................................................................................................................................................... 39
Communication interfaces ...........................................................................................................................................................................41
4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................42
Rated values ...................................................................................................................................................................................................42
Thermal protection with RTD thermometric probes - 26 ........................................................................................................................44
Residual overcurrent / High impedance restricted ground fault - 50N/51N-87NHIZ .........................................................................46
Low impedance restricted ground fault- 64REF .......................................................................................................................................56
Differential protection for generator-motor-short line (87G-M-L) ....................................................................................................... 60
Breaker failure - BF ...................................................................................................................................................................................... 70
4.5 CONTROL AND MONITORING ........................................................................................................................................................................72
Logical block - BLOCK1 ................................................................................................................................................................................72
Selective block -BLOCK2 .............................................................................................................................................................................74
Logic block summary ................................................................................................................................................................................... 79
Remote tripping ............................................................................................................................................................................................ 80
Frequency tracking .......................................................................................................................................................................................81
CT supervision - 74CT - side H and side L .................................................................................................................................................82
Trip circuit supervision - 74TCS ................................................................................................................................................................. 83
Circuit breaker supervision .........................................................................................................................................................................86
Demand measures ....................................................................................................................................................................................... 89
Oscillography ............................................................................................................................................................................................... 89
5 MEASURES, LOGIC STATES AND COUNTERS 90
Measures ....................................................................................................................................................................................................... 90
Protection ...................................................................................................................................................................................................... 90
Delayed inputs .............................................................................................................................................................................................. 90
Internal states ............................................................................................................................................................................................... 90
Relays .............................................................................................................................................................................................................. 91
Counters ..........................................................................................................................................................................................................91
Self test ...........................................................................................................................................................................................................91
Pilot wire diagnostic .....................................................................................................................................................................................92
Selective Block - BLOCK2 ............................................................................................................................................................................92
Fault recording - SFR ....................................................................................................................................................................................92
Event recording - SER ...................................................................................................................................................................................92
Oscillography - DFR ..................................................................................................................................................................................... 93
6 INSTALLATION 95
6.1 PACKAGING .......................................................................................................................................................................................................95
6.2 MOUNTING ........................................................................................................................................................................................................95
6.3 ELECTRICAL CONNECTIONS ......................................................................................................................................................................... 99
6.4 NOMINAL CURRENT I
n
AND I
En
SETTING ................................................................................................................................................107
6.5 LED ALLOCATION ............................................................................................................................................................................................ 111
6.6 FINAL OPERATIONS .......................................................................................................................................................................................111
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