Sel 421 - Page 49

U.1.7
Date Code 20090715 User’s Guide SEL-421 Relay
Introduction and Specifications
SEL-421 Versions and Supported Features
➤ Connector type
➢ Fixed PT and CT terminal block inputs
➢ Plug-in/plug-out PT and shorting CT Connectorized
®
versions
Contact the SEL factory or your local Technical Service Center for particular
part number and ordering information (see Factory Assistance on
page U.6.45). You can also view the latest part number and ordering
information on the SEL website at www.selinc.com.
SEL-421 Versions and Supported Features
SEL-421 Features -0 -1 -2 -3
Protection
21G Mho Ground Distance and 21P Mho Phase Distance standard standard standard standard
High-Speed Distance and High-Speed Directional standard standard
50N/G Ground, 50P Phase, and 50Q Negative-Sequence—O/C standard standard standard standard
51N/G Ground, 51P Phase, and 51Q Negative-Sequence Time—O/C standard standard standard standard
67N/G Ground, 67P Phase, and 67Q Neg.-Seq. Directional—O/C standard standard standard standard
Programmable Analog Math standard standard standard standard
Out-of-Step Trip and Block standard standard standard standard
Load-Encroachment Supervision standard standard standard standard
Switch-Onto-Fault standard standard standard standard
Single-Pole Trip standard standard standard standard
M
IRRORED BITS Communications standard standard standard standard
Zone/Level Timers standard standard standard standard
Pilot Protection Logic standard standard standard standard
Series-Compensated Line Logic standard standard
Instrumentation and Control
79 Automatic Reclosing, Voltage Check on Closing, 25 Synchronism Check standard standard standard standard
Fault Locating standard standard standard standard
SEL
OGIC Control Equations standard standard standard standard
Maximum Automation SEL
OGIC Control Equations 1000 100 100 1000
Substation Battery Monitor standard standard standard standard
Breaker Wear Monitor standard standard standard standard
Event Report (Multicycle Data) and Sequential Events Recorder standard standard standard standard
Instantaneous, RMS, and Demand Meter standard standard standard standard
DNP3 Level 2 Slave standard optional optional optional
Synchrophasors (IEEE C37.118 and SEL-Fast Message)
a
standard standard standard standard
Remote Synchrophasor Measurement
b
standard standard
Courtesy of NationalSwitchgear.com