2
NC020 - Manual - 05 - 2022
TABLE OF CONTENTS
— 1 INTRODUCTION 5
Scope and liability ...........................................................................................................................................................................................5
Applicability ......................................................................................................................................................................................................5
Conformity ........................................................................................................................................................................................................5
Technical support ............................................................................................................................................................................................5
Copyright ...........................................................................................................................................................................................................5
Warranty ...........................................................................................................................................................................................................5
Safety recommendations ...............................................................................................................................................................................5
Insulation tests ................................................................................................................................................................................................5
Product identification .....................................................................................................................................................................................6
Environment .....................................................................................................................................................................................................6
Graphical conventions ...................................................................................................................................................................................6
Glossary/definitions ........................................................................................................................................................................................6
— 2 GENERAL 10
Preface ........................................................................................................................................................................................................... 10
Photo ...............................................................................................................................................................................................................11
Main features .................................................................................................................................................................................................11
— 3 TECHNICAL DATA 12
3.1 GENERAL ............................................................................................................................................................................................................12
Mechanical data ...........................................................................................................................................................................................12
Insulation ........................................................................................................................................................................................................12
EMC tests for interference immunity .........................................................................................................................................................12
Voltage dip and interruption ........................................................................................................................................................................12
EMC tests for interference immunity .........................................................................................................................................................12
Emission ......................................................................................................................................................................................................... 13
Mechanical tests .......................................................................................................................................................................................... 13
Climatic tests ................................................................................................................................................................................................. 13
Safety ............................................................................................................................................................................................................. 13
Certifications ................................................................................................................................................................................................. 13
3.2 INPUT CIRCUITS ...............................................................................................................................................................................................14
Auxiliary power supply
U
aux
.......................................................................................................................................................................14
Phase current input circuits ........................................................................................................................................................................14
Unbalance neutral current input circuit ....................................................................................................................................................14
Binary input circuits ......................................................................................................................................................................................14
3.3 OUTPUT CIRCUITS ............................................................................................................................................................................................14
Output relays ..................................................................................................................................................................................................14
3.4 MMI .....................................................................................................................................................................................................................15
3.5 COMMUNICATION INTERFACES ...................................................................................................................................................................15
Local port ........................................................................................................................................................................................................15
Remote port ....................................................................................................................................................................................................15
3.6 GENERAL SETTINGS ........................................................................................................................................................................................15
3.7 PROTECTIVE ELEMENTS .................................................................................................................................................................................15
Discharge time - TD ......................................................................................................................................................................................15
Undercurrent - 37 ..........................................................................................................................................................................................15
Neutral unbalance overcurrent - 46N ........................................................................................................................................................15
Phase overcurrent - 50/51 RMS ..................................................................................................................................................................16
Phase overcurrent - 50/51 Fundamental ...................................................................................................................................................17
Residual overcurrent - 50N/51N .................................................................................................................................................................17
Peak overvoltage - 59H ............................................................................................................................................................................... 18
Breaker failure - BF ...................................................................................................................................................................................... 18
3.8 CONTROL AND MONITORING ....................................................................................................................................................................... 19
Circuit Breaker monitoring ......................................................................................................................................................................... 19
Oscillography (DFR) ..................................................................................................................................................................................... 19
3.9 MEASURES ....................................................................................................................................................................................................... 19
— 4 FUNCTION CHARACTERISTICS 20
4.1 HARDWARE DESCRIPTION ............................................................................................................................................................................ 20
Power supply board ..................................................................................................................................................................................... 20
CPU board .......................................................................................................................................................................................................21
Input board .....................................................................................................................................................................................................21
MMI (keyboard, LED and display) ..............................................................................................................................................................21
4.2 SOFTWARE DESCRIPTION ..............................................................................................................................................................................22
Kernel ..............................................................................................................................................................................................................22
Drivers .............................................................................................................................................................................................................22
Application......................................................................................................................................................................................................22