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NA11 - Manual - 02 - 2009
T A B L E O F C O N T E N T S
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 .............................................................................................................................................................................................................. 10
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 ..................................................................................................................................................................................................14
3.2 INPUT CIRCUITS ...............................................................................................................................................................................................14
Auxiliary power supply
U
aux
.......................................................................................................................................................................14
Phase current input circuits ........................................................................................................................................................................14
Residual current input circuit ......................................................................................................................................................................14
Binary input circuits ......................................................................................................................................................................................14
Block input (logic selectivity) ......................................................................................................................................................................14
3.3 OUTPUT CIRCUITS ............................................................................................................................................................................................15
Output relays ..................................................................................................................................................................................................15
Block output (Logic selectivity) ...................................................................................................................................................................15
3.4 MMI .....................................................................................................................................................................................................................15
3.5 COMMUNICATION INTERFACES ...................................................................................................................................................................15
Local port ........................................................................................................................................................................................................15
Remote ports ..................................................................................................................................................................................................15
3.6 GENERAL SETTINGS ........................................................................................................................................................................................16
3.7 PROTECTIVE ELEMENTS .................................................................................................................................................................................16
Thermal protection with Pt100 probes - 26 ...............................................................................................................................................16
Phase overcurrent - 50/51 - settings for 1/5 A standard CTs version ...................................................................................................16
Phase overcurrent - 50/51 - settings for low power CTs version (LPCT) .............................................................................................17
Residual overcurrent - 50N/51N - settings for 1/5 A standard CTs version ........................................................................................ 19
Breaker Failure - BF ..................................................................................................................................................................................... 20
Residual overcurrent - 50N/51N - settings for low power CTs version (LPCT) ................................................................................. 20
Breaker failure - BF .......................................................................................................................................................................................22
3.8 CONTROL AND MONITORING ....................................................................................................................................................................... 23
Second harmonic restraint - 2ndh-REST .................................................................................................................................................. 23
Trip Circuit Supervision - 74TCS ................................................................................................................................................................. 23
Selective block - BLOCK2 ........................................................................................................................................................................... 23
Circuit Breaker monitoring ......................................................................................................................................................................... 23
CT supervision - 74CT .................................................................................................................................................................................. 23
Pilot wire diagnostic .................................................................................................................................................................................... 23
Demand measures ....................................................................................................................................................................................... 23
Oscillography (DFR) ......................................................................................................................................................................................24
PLC (Programmable Logic Controller) .......................................................................................................................................................24
3.9 MEASURES ........................................................................................................................................................................................................25
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