Transformer Protection Products
The high importance and cost of transformers make it crucial to maintain these assets. SEL has developed a wide variety of advanced transformer protection relays for all your transformer applications, providing top-of-the-line protection and control. Choose the relay that best suits your transformer needs.
- SEL-487E Transformer Protection Relay
The SEL-487E provides comprehensive protection, metering, monitoring, and automation of power transformer applications with up to five 3-phase restraint current inputs, two 3-phase voltage inputs, and three independent neutral current inputs with restricted earth fault (REF) elements.
- SEL-387 Current Differential and Overcurrent Relay
Protect and control any two-, three-, or four-winding power transformer with the SEL-387, which provides thermal and through-fault monitoring, and with SELogic® Control Equations, can detect breaker failure.
- SEL-387E Current Differential and Voltage Relay
Protect power transformers with up to three windings, as well as reactors, generators, large motors, and other multi-terminal power apparatus.
- SEL-387A Current Differential and Overcurrent Relay
Apply the SEL-387A to protect any two-winding power transformer and perform predictive maintenance based on accumulated through-fault duty (as compared to transformer capability as defined in ANSI Standard C57.109).
- SEL-587 Current Differential Relay
Apply economical differential protection for two-winding transformers or any two-terminal apparatus.
- SEL-787 Transformer Protection Relay
The SEL-787 Relay is a versatile, two-winding current differential relay that protects industrial transformers. Monitor transformer health with cumulative through-fault current recording, and for the first time in the industry, automatically check and generate differential compensation settings with the Commissioning Assistant Software.
- SEL-2414 Transformer Monitor
The SEL-2414 Transformer Monitor provides an exceptional combination of monitoring, control, and communications in a compact package.