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Apply 3CR3 fault indicators on single- and three-phase sectionalized systems. The 3CR3 fault indicator requires a minimum continuous load current to reset and remain ready to respond to a fault.

3CR3 fault indicators are best suited for installation on underground systems near sectionalizing points. In three-phase feed-through transformers, install the indicators at the base of the connector on the underground cable. 3CR3 indicators are ideal in three-phase applications where test point type connectors are not available to install a voltage reset type indicator. In livefront switchgear applications, install one set of 3CR3 fault indicators on each outgoing feed, with the phase sensors installed below the stress relief terminator located in the pad or pedestal. Train the remote display lead up to near the top of the cabinet for mounting at the optimum location. The 3CR3 is also ideal for application in subsurface network switchgear or any three-phase elbow switching structure of wall-mounted switchgear. To keep the cables tidy and in place, EOS Manufacturing offers magnetic cable guides that securely position the cable but are easy to reposition when pulling elbows or working inside the enclosure.

SEL offers an optional auxiliary contact feature that can be used with the utilities' SCADA systems. This normally open latching-type contact closes when a fault occurs and will not open until normal system load current is restored for 30 continuous seconds.