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Fault Indicators and Sensors

Fault-Indicator

SEL designs and manufactures fault indicators and sensors, supplying utilities around the world with products that help reduce fault-finding time so that power can be restored quickly after a fault occurs. SEL is the electric power industry's leader in fault indicator technology, producing the widest variety of fault indicator products.

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Advantages of SEL Fault Indicators

  • They help utilities restore service faster.
  • They reduce fault-finding time by 50 percent.
  • Compact, lightweight construction simplifies installation.
  • Strong, simple clamping mechanisms fit various conductor sizes, ensuring fast, reliable installation.
  • Displays are easy to spot and read and require fewer holes to be drilled in a transformer cabinet for installation.
  • Any SEL fault indicator that uses batteries relies on patented technology, offering the longest cumulative flashing-hour life in the industry. 
  • Require little, if any, maintenance.
  • Magnetic cable guides keep remote display and sensor wiring neatly in place.
  • Standard and custom solutions are available.

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System Components

FLT-FLR

SEL-FLT and SEL-FLR

The SEL-FLT and SEL-FLR Fault and Load Transmitter and Receiver System improves the overall reliability of your distribution system through accurate fault indication and load monitoring. The system enables you to locate faults faster and make informed switching decisions. Restoring power quickly is essential to ensuring satisfied customers and better CAIDI reliability metrics. Locating momentary faults allows you to address system issues and improve MAIFI metrics. Highly accurate (1% typical) load data also enables phase balancing and system planning.

AR360

Overhead Fault Indicators

SEL offers a variety of fault indicators for use on unfused taps, long feeders with midline reclosers or sectionalizers, overhead to underground transitions, and feeders that experience recurring faults.

Choose from manual, timed, or automatic reset models and line- or battery- powered options. Easy-to-install and maintenance-free, SEL fault indicators help identify and locate temporary and permanent faults faster, enabling the utility to make repairs and restore power faster.

AR-URD

Underground Fault Indicators

SEL offers a variety of fault indicators for use on subsurface or pad-mounted transformers, subsurface or pad-mounted switchgear and sectionalizing cabinets, junction boxes, and splices. Choose from single-phase underground or three-phase underground (single-phase sectionalized or three-phase sectionalized), depending on your application. Select from manual, timed, or automatic reset models and cable- or battery-powered options. An auxiliary contact option provides SCADA compatibility. SEL fault indicators help identify and locate temporary and permanent faults faster, enabling the utility to make repairs and restore power faster.

SEL-FT50, SEL-RP50, and SEL-FR12 Fault Indicators

SEL-FT50, SEL-RP50, SEL-FR12 Fault Transmitter, Repeater, and Receiver System

The SEL-FT50, SEL-RP50, and SEL-FR12 Fault Transmitter, Repeater, and Receiver System helps relays make better tripping and reclosing decisions based on the location of a fault, augmenting your existing distribution protection schemes to improve the reliability and safety of your feeder. The system allows you to block reclosing for underground faults to reduce equipment stress, quickly implement fast bus tripping protection without the need of additional equipment or expensive installation, and enable fast trip blocking schemes while coordinating with lateral fuses.

Radio Ranger

RadioRANGER

The RadioRANGER Underground Wireless Fault indication System reduces the need to access vaults to retrieve faulted circuit indicator status, decreasing fault-locating time and improving utility personnel safety. SEL fault indicators equipped with magnetic RadioRANGER Interface Probes communicate their status to an SEL-8300 RadioRANGER Wireless Interface. Utility personnel can quickly and safely retrieve subsurface FCI status, at street level, through wireless communication between the SEL-8300 and the handheld SEL-8310 RadioRANGER Remote Fault Reader.

FC

Tools and Sensors

SEL tools and sensors may be used in conjunction with SEL fault indicators or as stand alone devices.