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DMC3S - Manual - 08 - 2021
SUMMARY
1 GENERAL INFORMATION 5
Preface .............................................................................................................................................................................................................. 5
2 DESCRIPTION 5
Main Characteristics ......................................................................................................................................................................................5
Protection Functions ....................................................................................................................................................................................... 5
Control Functions .............................................................................................................................................................................................5
3 TECHNICAL CHARACTERISTICS 6
3.1 GENERAL INFORMATION 6
Mechanical characteristics ..........................................................................................................................................................................6
Electromagnetic compatibility (EMC)...........................................................................................................................................................6
Disturbance immunity tests ...........................................................................................................................................................................6
Climate tests ..................................................................................................................................................................................................... 7
Mechanical tests ............................................................................................................................................................................................. 8
Insulation test ...................................................................................................................................................................................................8
Reference specifications ...............................................................................................................................................................................8
ENEL general standards and tables .............................................................................................................................................................8
Certifications ....................................................................................................................................................................................................8
Environmental Condition ................................................................................................................................................................................8
3.2 INPUT CIRCUITS 9
Auxiliary circuit power
U
aux
.......................................................................................................................................................................... 9
Amperometric phase inputs ..........................................................................................................................................................................9
Residual current amperometric inlet ...........................................................................................................................................................9
Voltmetric inputs .............................................................................................................................................................................................. 9
Residual voltage / Vsync voltage voltmetric input ..................................................................................................................................... 9
Digital inputs .....................................................................................................................................................................................................9
3.3 OUTPUT CIRCUITS 9
Final electromechanical relays ..................................................................................................................................................................... 9
Final solid state relays ..................................................................................................................................................................................10
3.4 MMI 10
3.5 COMMUNICATIONS CIRCUITS 10
Local port ........................................................................................................................................................................................................10
Connection 61850 ...........................................................................................................................................................................................10
Remote module connection ......................................................................................................................................................................... 10
3.6 PROTECTION AND CONTROL FUNCTIONS 11
3.6 NOMINAL VALUES 12
3.7 PROTECTION FUNCTIONS 12
Direct undervoltage - 27CC (80.s) ...............................................................................................................................................................12
Maximum directional active power 32P ....................................................................................................................................................12
Negative sequence overcurrent - 46 .........................................................................................................................................................13
Overcurrent - 50/51 ........................................................................................................................................................................................14
Residual overcurrent - 50N/51N ..................................................................................................................................................................15
Neutral overcurrent - 51N(E) .......................................................................................................................................................................16
Residual emergency overcurrent - 51N(Eme) ..........................................................................................................................................17
Neutral current unbalance - 51(SQL) .........................................................................................................................................................18
Overvoltage - 59 ............................................................................................................................................................................................. 18
Residual overvoltage - 59N .......................................................................................................................................................................... 19
Residual emergency overcurrent - 59N(eme) ..........................................................................................................................................19
Maximum directional current - 67 ..............................................................................................................................................................20
Ground directional overcurrent - 67N ........................................................................................................................................................ 22
EAC (Equilibratore Automatico di Carico) [ALB frequency (Automatic Load Balancer)] .................................................................. 25
Second harmonic restraint - 2ndh-REST ................................................................................................................................................... 25
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