Category Archives: SEL

SEL-3505 RTAC

SEL-3505 RTAC

The SEL 3505 is the newest, and low-end version of the RTAC. It supports Modbus, DNP3, IEC 61950, and GOOSE…

SEL 3555 RTAC

SEL 3555 RTAC

The SEL 3555 on the high end of the RTAC family. It’s an RTU supporting Modbus, DNP3, IEC 61950, and…

SEL-451 Recloser

SEL-451 Recloser

Most common recloser used for transmission-connected PV solar sites. Everything it does, it does well. It’s fast responding protection equipment…

SEL 651R Recloser

SEL 651R Recloser

This is the most common recloser used for distribution-connected PV solar sites. Everything it does, it does well. It’s fast…

SEL-751 A

SEL-751 A

The SEL-751 A is a device for feeder protection for industrial utility applications. It uses Modbus, DNP, IEC, as well…

SEL-551

SEL-551

Similar to 501, the SEL 551 also provides a recloser relay, mostly for utility applications. It uses Modbus and IEC…

SEL-501

SEL-501

The SEL-501 is an overcurrent protection relay, often referred to as a universal overcurrent relay. This device can protect two…

SEL-701

SEL-701

SEL-701 is a motor protection relay. We often find the SEL-701 in more industrial applications, and some utility applications at…

SEL-700G

SEL-700G

The 700G is a generator protection relay mostly used in emergency power supply system applications. This device supports Modbus and…

SEL-3530

SEL-3530

Real time automation controller, also known as RTAC, is popular in substation applications and industrial control applications. It provides similar…