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Date Code 990430 Factory-Set Logic i
SEL-351P Manual Técnico
TABLE OF CONTENTS
SECTION 1: FACTORY-SET LOGIC ......................................................1-1
Introduction...................................................................................................................................1-1
Factory Default Settings .......................................................................................................1-1
Installation Variations and Logic Changes...........................................................................1-1
EZ Settings vs. “Regular” Settings .......................................................................................1-1
Overcurrent Element Functions Overview ...........................................................................1-5
Residual Ground vs. Neutral Ground....................................................................................1-6
Cold Load Pickup Scheme............................................................................................................1-7
Enable Cold Load Pickup Scheme........................................................................................1-7
Start Loss of Load Diversity Timer ......................................................................................1-8
Actively Engage Cold Load Pickup Scheme (Phase Elements Example) ............................1-9
Use Overcurrent Element Torque Control Logic to Enable/Disable or Desensitize
Elements (Phase Elements Example)..........................................................................1-11
Desensitize Delay Curve – Maintain Coordination (Phase Elements Example) ................1-11
Disengage Cold Load Pickup Scheme (Phase Elements Example) ....................................1-12
Other Cold Load Pickup Scheme Details Involving Ground and SEF Elements ...............1-12
Fast Curve Operation Logic........................................................................................................1-13
Fast Curve Operation When Reclosing Is Defeated ...........................................................1-14
Operations to Lockout, Activate High Current Trip, and Activate High Current Lockout
Logic ...................................................................................................................................1-17
High Current Trip Operation When Reclosing Is Defeated ...............................................1-17
Overcurrent Element Enable/Disable Logic...............................................................................1-24
Trip Logic ...................................................................................................................................1-28
Close Logic .................................................................................................................................1-29
Close Conditions – Other Than Auto-Reclosing ................................................................1-29
Unlatch Close Conditions ...................................................................................................1-30
Recloser Status....................................................................................................................1-31
Drive-to-Lockout Logic ..............................................................................................................1-32
Operations to Lockout.........................................................................................................1-32
High-Current Lockout.........................................................................................................1-33
Other Drive-to-Lockout Conditions....................................................................................1-34
Block Reset Timing ....................................................................................................................1-36
Sequence Coordination...............................................................................................................1-37
Reclose Supervision Logic .........................................................................................................1-40
Trip and Close Capacitors Charged ....................................................................................1-41
Healthy Battery ...................................................................................................................1-41
Operator Control Logic...............................................................................................................1-41
Detailed Operator Control Pushbutton Output ...................................................................1-43
TERRA HABILITADO Operator Control Pushbutton Output...........................1-43
Other operator control pushbutton outputs operate similarly to TERRA
HABILITADO.............................................................................................1-44
BLOQUEIO Operator Control Pushbutton Output.....................................................1-44
ABRIR and FECHAR Operator Control Pushbutton Outputs....................................1-45
Corresponding Operator Control LEDs and Logic Applications .......................................1-47
TERRA HABILITADO Operator Control..................................................................1-48