The SEL-CRD is used for fault location on overhead power distribution systems. It is powered by load current and indicates a faulted line condition by showing a large red reflective target display. The SEL-CRD automatically resets upon restoration of load current that meets the minimum load requirement.
SEL-CRDs can be installed with a single hot stick, have a 1 ms response time, and significantly reduce fault-finding times. The UV-stabilized polycarbonate housing, vinyl-coated core, and stainless steel spring make the SEL-CRD suitable for application in harsh outdoor conditions.
The SEL-CRD is powered by line current—no battery is necessary.
There is no minimum voltage requirement.
The SEL-CRD automatically resets upon restoration of the load current.
The inrush restraint feature prevents false tripping during recloser operations.
The SEL-CRD is easy to install with a single hot stick.
UV-stabilized materials provide excellent weatherability.
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.