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Schweitzer Engineering Laboratories (SEL)

SEL makes electric power safer, more reliable, and more economical. To accomplish this mission, it designs, manufactures, and supports a complete line of products and services for the protection, monitoring, control, automation, and metering of electric power systems.

Products List

Power Systems
  • SEL-411L Advanced Line Differential Protection, Automation, and Control System
  • SEL-421 Protection, Automation, and Control System
  • SEL-311C Transmission Protection System
  • SEL-311L Line Current Differential System
  • SEL-387L Line Current Differential Relay
  • SEL-311M Current Differential Relay
  • SEL-321/321-5 Phase and Ground Distance Relay
  • Distribution
  • SEL-451 Protection, Automation, and Bay Control System
  • SEL-2431 Voltage Regulator Control
  • SEL-751A Feeder Protection Relay
  • SEL-651R-2 Advanced Recloser Control
  • SEL-351S Protection System
  • SEL-351A Protection System
  • SEL-734B Enclosure
  • SEL-734T Advanced Digital Transducer
  • SEL-501-0, -1, -2 Connectorized Dual Universal Overcurrent Relay
  • SEL-551 Connectorized Overcurrent/Reclosing Relay
  • SEL-547 Distributed Generator Interconnection Relay
  • SEL-351R Falcon™ Recloser Control
  • SEL-351RS Kestrel™ Single Phase Recloser Control
  • SEL-351 Protection System
  • SEL-751 Feeder Protection Relay
  • SEL-551C Overcurrent/Reclosing Relay
  • Fault Indicators and Sensors
  • AutoRanger Fault Indicators
  • SEL-8315 Phase Comparison Faulted Circuit Indicator
  • WSO - Wireless Sensor for Overhead Lines
  • RadioRANGER Wireless Fault Indicator System
       BTRIP - Troubleshooting Kit
       PILC - Paper Insulated Lead Cable Fault Indicator
       ERL - Electrostatic Reset
       BER - BEACON Electrostatic Reset
       CRD — Current Reset
       TPR - Test Point Reset
       3VR - Three-Phase Voltage Reset
       CT - Split-Core Current Transformer
       AR-OH — Overhead AutoRANGER
       BTRI_IR — BEACON Timed Reset
       AR-URD — Underground AutoRANGER®
       TR — Timed Reset
       SR — Secondary - Low-Voltage Reset
       MR and MB — Manual Reset
       GFD — Ground Fault Detector
       VIN — Voltage Indicators
       VS — Voltage Sensors
       FC — Fault Counters
       MCG - Magnetic Cable Guide
  • Transformer, Bus, Breaker, and Capacitor Protection
  • SEL-487E-3, -4 Transformer Protection Relay
  • SEL-787 Transformer Protection Relay
  • SEL-2414 Transformer Monitor
  • SEL-387A Current Differential and Overcurrent Relay
  • SEL-387E Current Differential and Voltage Relay
  • SEL-487B-1 Bus Protection Relay
  • SEL-587Z High-Impedance Differential Relay
  • SEL-487V Capacitor Protection and Control System
  • SEL-352 Breaker Failure Relay
  • SEL-387 Current Differential and Overcurrent Relay
  • SEL-587 Current Differential Relay
  • SEL-787-3/-4 Transformer Protection Relay
  • Generator and Motor Protection
  • SEL-849 Motor Management Relay
  • SEL-710-5 Motor Protection Relay
  • SEL-700G Generator Protection Relays
  • SEL-300G Generator Relay
  • SEL-2664/2665 Field Ground Module/Stator Winding Protection Module
  • SEL-749M Motor Relay
  • SEL-701 Motor Protection Relay
  • SEL-2600 RTD Module
  • SEL-700GT Intertie Protection Relay
  • SEL-700GW Wind Generator Relay
  • SEL-710 Motor Protection Relay
  • Metering
  • SEL-735 Power Quality and Revenue Meter
  • SEL-734 Revenue Meter
  • Accessories and Tools
  • SEL-RS43 Selector Switch
  • SEL-RS52 Breaker Control Switch
  • SEL-RS86 Lockout Switch
  • SEL-4520 Arc-Flash Test Module
  • SEL-2652 Trip Coil Monitor
  • SEL-2505PB Mirrored Bits Interface
  • SEL-4388 Mirrored Bits Tester
  • SEL-9510 Control Switch Module
  • SEL-9501/9502 Contact Arc Suppressors

  • Automation and Integration
    Information Processors
  • SEL-3530 Real-Time Automation Controllers (RTACs)
  • SEL-3505/3505-3 Real-Time Automation Controllers (RTACs)
  • SEL-2032 Communications Processor
  • SEL-2100 Logic Processor
  • SEL-3555 Real-Time Automation Controller (RTAC)
  • I/O Processors and Controllers
  • SEL-2240 Axion
  • SEL-2411 Programmable Automation Controller
  • SEL-2440 DPAC Discrete Programmable Automation Controller
  • SEL-2595 Teleprotection Terminal
  • SEL-2505 Remote I/O Module
  • SEL-2506 Rack-Mount Remote I/O Module
  • SEL-2515 Remote I/O Module
  • SEL-2516 Rack-Mount Remote I/O Module
  • Annunciation and Notification
  • SEL-2523 Annunciator Panel
  • SEL-2533 Annunciator
  • SEL-2522 Alarm Panel
  • SEL-3010 Event Messenger
  • Computing
  • SEL-3355 Computer
  • SEL-3360S Compact Industrial Computer
  • Synchrophasors
  • SEL-5078-2 SynchroWAVE Central Visualization and Analysis Software
  • SEL Disturbance Recording System
  • SEL-3373 Station Phasor Data Concentrator (PDC)
  • SEL-5073 SynchroWAVE Phasor Data Concentrator (PDC) Software
  • Legacy SEL-311A Phase and Ground Distance Relay
  • Legacy SEL-311B Distance Relay With Recloser
  • Software
  • acSELerator Team SEL-5045 Software
  • acSELerator QuickSet SEL-5030 Software
  • acSELerator Architect SEL-5032 Software
  • acSELerator Analytic Assistant SEL-5601 Software

  • Networking
    Wide-Area Networks (WANs)
  • SEL ICON Integrated Communications Optical Network
  • Local-Area Networks (LANs)
  • SEL-3620/3622 Ethernet Security Gateway
  • SEL-2730M/2730U 24-Port Ethernet Switches
  • SEL-3610 Port Server
  • SEL-2890 Ethernet Transceiver
  • SEL-2725 Five-Port Ethernet Switch
  • SEL-2726U Eight-Port Ethernet Switch
  • SEL-3390S8 Serial Adapter Card
  • SEL-3390E4 Network Adapter Card
  • SEL-2740M Managed Ethernet Switch
  • SEL-2740S Software Defined Networking Switch
  • SEL-2730U Unmanaged 24-Port Ethernet Switch
  • Wireless Serial Communication
  • SEL-3031 Serial Radio Transceiver
  • SEL-2924 Portable BLUETOOTH Serial Adapter
  • SEL-2925 BLUETOOTH Serial Adapter
  • SEL-3021-1 Serial Encrypting Transceiver
  • SEL-3060 Ethernet Radio
  • Wired Serial Communication
  • SEL-2886 EIA-232 to EIA-485 Interface Converter
  • SEL-2910 Port Isolator
  • SEL-9192 Utility-Grade USB Modem
  • SEL-3025 Serial Shield
  • Serial Fiber-Optic Communication
  • SEL-9220 Fiber Optic Adapter for SEL-300 Series Relay
  • SEL-2894 Interface Converter
  • SEL-3094 Interface Converter
  • SEL-2126 Fiber-Optic Transfer Switch
  • SEL-2800/2810 Fiber-Optic Transceivers
  • SEL-2812, SEL-2814, SEL-2815 Fiber-Optic Transceivers
  • SEL-2829, SEL-2830, SEL-2831 Fiber-Optic Transceivers
  • SEL-2820/2824 Serial Fiber-Optic Transceivers
  • Precise Time
  • SEL-2407 Satellite-Synchronized Clock
  • SEL-2401 Satellite-Synchronized Clock
  • SEL-2404 Satellite-Synchronized Clock
  • SEL-3401 Digital Clock
  • SEL-5860 Time Service Software
  • SEL-3400 IRIG-B Distribution Module
  • SEL-2488 Satellite-Synchronized Network Clock
  • Fiber-Optic Cable Assemblies
  • SEL-C804 Multimode Arc-Flash Detection Fiber-Optic Cables
  • SEL-C805 Multimode 200 Core Fiber-Optic Cables
  • SEL-C807/C808 Multimode 62.5/200 and 62.5/125 Core Fiber-Optic Cables
  • SEL-C809 Single-Mode Fiber-Optic Cables
  • Other Cable Assemblies
  • Electrical Data Cables
  • Coaxial Cables
  • Category 5e Ethernet Cables
  • USB Serial Cables
  • SEL-C662 and SEL-C663 USB to Serial Port Cables
  • Power Supplies
  • SEL-LPS Linear Power Supply
  • SEL-UPS Uninterruptible Power Supply
  • SEL-9310 Power Supply/Battery Charger
  • SEL-9321 Low-Voltage DC Power Supply
  • SEL-9322 15 Vdc Power Supply
  • AC Power Supply