Sel SEL-421 - Page 520

R.10.2
SEL-421 Relay Reference Manual Date Code 20111215
Settings
➢ Ground distance elements
➢ Switch-onto-fault
➢ Out-of-step
➢ Load encroachment
➢ Instantaneous/definite-time overcurrent
➢ Time overcurrent
➢ Zone/level direction
➢ Directional control
➢ Pole open detection
➢ Breaker failure
➢ POTT trip scheme
➢ DCUB trip scheme
➢ DCB trip scheme
➢ Synchronism check
➢ Reclosing and manual close
➢ Demand metering
➢ Trip logic and ER trigger
➤ Protection Free-Form SELOGIC Control Equations on
page R.10.34
➤ Automation Free-Form SELOGIC Control Equations on
page R.10.35
➤ Output Settings on page R.10.35
➢ Main board
➢ Interface board outputs
➢ Communications card outputs
➢ MIRRORED BITS
®
communications transmit equations
➤ Front-Panel Settings on page R.10.37
➢ Pushbutton and target LEDs
➢ Selectable screens
➢ Selectable operator pushbuttons
➢ Front-panel event display
➢ Display points
➢ Local control
➤ Report Settings on page R.10.44
➢ SER chatter criteria
➢ SER points and aliases
➢ Event reporting
➢ Event report digital elements
➤ Port Settings on page R.10.46
➢ Ports 1, 2, 3, F, and 5
➤ DNP3 Settings—Serial Port on page R.10.50