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Speed Up Distribution Protection

SEL-FT50 and SEL-FR12 Fault Transmitter and Receiver System

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Make Your Distribution Protection System Smarter

The SEL-FT50 and SEL-FR12 Fault Transmitter and Receiver System provides your recloser controls and protective relays with the speed and insight to make better tripping decisions that benefit the entire feeder. It’s a simple and economical solution for faster tripping, better coordination, and higher system reliability for distribution protection.

Speed or Coordination? The Tradeoff Is Over.

Until recently, the practical choice in distribution protection was to sacrifice tripping speed for coordination between fuses, recloser curves, and relays. That meant routinely waiting hundreds of milliseconds or more before clearing a fault because the recloser control didn’t know where the fault occurred.

Not anymore.



Send Fault Indications in 6 ms

With the SEL-FT50 and SEL-FR12 System, your recloser control or relay will receive fault indications within 6 ms. That’s because the SEL-FT50 Fault Transmitters immediately detect when a fault occurred and send this information to the SEL-FR12 Fault Receiver, which communicates the information to the protection device. Now, the recloser control or relay knows which line the fault is on and can make a faster tripping decision that’s better for your reliability.

Speed or Coordination

Fuse Blowing or Fuse Saving? Mix Them Both.

Before, you had to choose one coordination scheme per recloser control—fuse blowing or fuse saving. While one choice might have been preferable for a majority of the line segment, it might not have been ideal for every lateral or branch.

But now, you don’t have to choose.



Adapt Your Protection Schemes

With the SEL-FT50 and SEL-FR12 System, you can mix fuse-blowing and fuse-saving schemes within the recloser control to address the specific needs of each lateral. And because your recloser control gets branch-specific fault data within 6 ms, it now has the insight and ability to adapt its protection scheme to fit the situation.

Better Reliability

Adaptive Reclosing

You can also mix protection schemes at underground-to-overhead and overhead-to-underground transitions. Placing an SEL-FT50 at the transition point means the recloser control or relay can see which side the fault is on, so it can block reclosing for underground faults but enable reclosing to clear temporary overhead faults.

Fine Tune Transitions

Drive Straight to the Fault

Instead of searching the entire feeder for a fault—at times in poor weather conditions or difficult terrain—just drive straight to the fault location.

The SEL-FT50 and SEL-FR12 can send fault location information back to your SCADA system. Now, your line crew knows where they’re going, can plan ahead for the route, and can restore power sooner.

Locate Faults

Enhanced Protection for an Enhanced Distribution System

Better Reliability

Optimizing protection schemes to best fit the needs of each line segment improves your metrics for momentary faults (MAIFI) and outage duration (SAIDI). Finding faults faster allows you to restore power faster, improving your restoration metrics (CAIDI).

Longer Equipment Life

The faster your system clears a fault, the less stress there is on your lines and equipment. With the SEL-FT50 and SEL-FR12 System, your recloser controls and relays don’t need to wait for coordination delays, so faults are cleared faster, which reduces wear on transformers and other equipment.

Improved Safety

The longer the fault remains on the line, the more likely it can result in dangerous situations like fires or electrocution. By applying the SEL-FT50 and SEL-FR12 System, you can clear faults as fast as possible to improve safety.

With the SEL-FT50 and SEL-FR12 System, you have the visibility to design the
protection schemes you always wanted.


Adapt Coordination, Fast—SEL-FT50 & SEL-FR12

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Adapt Coordination, Fast—SEL-FT50 & SEL-FR12

Customize Reclosing for Feeders—SEL-FT50 & SEL-FR12

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Customize Reclosing for Feeders—SEL-FT50 & SEL-FR12

Speed Up Distribution Protection—SEL-FT50 & SEL-FR12

Watch Video New
Speed Up Distribution Protection—SEL-FT50 & SEL-FR12

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