Products

Apply the SEL-300G Relay for comprehensive primary and backup generator protection.

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.

Simplify protection in two-high switchgear with two independent sets of protection elements in one compact relay.

Apply low-cost, compact package with essential protection and control elements for distributed generation.

Apply economical differential protection for two-winding transformers or any two-terminal apparatus.

The SEL-700G is the right solution for utility and industrial generator protection, with an autosynchronizer, flexible I/O, and advanced communications. Apply the SEL-700G for comprehensive primary and backup generator protection.

Monitor and Control Critical Substation Apparatus With One Powerful Package

The SEL-710 Motor Protection Relay dynamically calculates slip. This premiere motor protection scheme allows maximum start times. Thermal motor protection models give the SEL-710 advanced protection beyond industry standards.

The SEL-710-5 provides synchronous motor protection, starting control, broken rotor bar detection, and now arc-flash protection.

Use the SEL-749M to protect and control all types of three-phase motors, including two-speed and reduced-voltage start motors.

The SEL-849 provides current, voltage, and thermal-based protection, arc-flash detection, and power metering for motor protection applications.

Measure and transmit data from up to 12 RTDs and a single contact status located in transformers, breakers, motors, generators, or other system apparatus.

Add the SEL-2664 Field Ground Module to the SEL-300G or SEL-700G to protect all the critical components in your generator with one comprehensive relay. Or, add the SEL-2664 to the SEL-2664S to complete ground fault protection on both the rotor and stator.

Protect high-impedance grounded generators from ground faults at standstill, during startup, and while running with the multisine frequency injection and neutral overvoltage-based protection in the SEL-2664S.