SEL-411L Advanced Line Differential Protectionadmin2015-09-28T16:22:39+00:00
Project Description
SEL-411L Advanced Line Differential Protection, Automation, and Control System
Apply the SEL-411L Relay for complete protection and control of any transmission line. The SEL-411L provides differential protection with both phase- and sequence-based operating elements for sensitivity and high-speed operation. Choose from many popular fiber and multiplexed communications options. Distance protection and logic from a complete SEL-421 Protection, Automation, and Control System are included to provide backup protection and integration. Any transmission line (short, long, or series-compensated) can be well protected with the SEL-411L Relay.
Functional Overview
21
Phase and Ground Distance
25
Synchronism Check
27
Undervoltage
32
Directional Power
50
Overcurrent
50BF
Dual Breaker Failure Overcurrent
51
Time-Overcurrent
59
Overvoltage
67
Directional Overcurrent
68
Out-of-Step Block/Trip
79
Single-/Three-Pole Reclosing
81
(O, U) Over-/Underfrequency
85
RIO SEL MIRRORED BITS Communications
87
Current Differential
DFR
Event Reports
ENV
SEL-2600
HMI
Operator Interface
LGC
Expanded SELOGIC Control Equations
MET
High-Accuracy Metering
PMU
Synchrophasors
SER
Sequential Events Recorder
BRM
Breaker Wear Monitor
LDE
Load Encroachment
LOC
Fault Locator
SBM
Station Battery Monitor
Front- and Rear-Panel Diagrams
Front
Rear
Line Current Differential, Distance, and Directional Overcurrent Protection
Apply single- or three-pole subcycle current differential protection for up to four terminal lines, even with two breakers per terminal.
Implement subcycle operation and superior security with five zones of phase and ground distance elements as well as directional overcurrent elements.
Reduce protection system costs by stocking one relay for line protection using a combination of the differential, distance, and overcurrent elements to meet your application needs.
Comprehensive Monitoring
Validate 87L channel health and enhance trip security by using advanced 87L channel monitoring functions.
Incorporate IEEE C37.118 synchrophasor measurements into wide-area protection and control systems.
Use high-accuracy time correlation to improve event report analysis.
Advanced Automation and Communication
Reduce total project construction and operation costs by integrating four-shot recloser and relay logic to automate operations.
Use serial or Ethernet communications to improve station integration.
Available protocols include Mirrored Bits communications, DNP3 LAN/WAN, Modbus®, the Simple Network Time Protocol (SNTP), the Parallel Redundancy Protocol (PRP), and IEC 61850.
High-Accuracy Fault Location
Find faults fast with the optional traveling wave fault location.
Reduce maintenance expenses by sending crews to the tower nearest the fault.
Use single- and double-ended impedance-based fault location methods in parallel with traveling wave fault location.