SEL-CRs can be installed on underground systems. SEL-CRs are powered by the load current present on an energized line. An SEL-CR will respond to a fault and remain in the faulted-display condition until the line is energized with normal line load; at which time, it will automatically reset.
UV-stabilized housings, stainless steel, and vinyl-coated clamping mechanisms make SEL-CRs suitable for use in the harsh environments of underground applications.
Years of Maintenance-Free Operation—Apply this energy-harvesting fault indicator in pad-mounted and underground distribution equipment without elbow test points.
Ideal Fault-Finding Solution—Apply the SEL-CR to primary 200 A-class and 600 A-class URD feeders in any medium-voltage radial distribution circuit. Install the SEL-CR on medium-voltage primary underground cable applications or on low-voltage secondary lines in industrial environments. The SEL-CR automatically resets upon restoration of load current.
Time Savings and Safety—Use remote display options, such as the RadioRANGER Underground Wireless Fault Indication System, to eliminate the need to open a pad-mounted or subsurface enclosure to determine fault status.
Report Back to SCADA—Choose the auxiliary contact option for SCADA compatibility.
|Power Source||Mechanical target: Load current |
LED display: Replaceable battery (standard)—1,200 flashing hours (2.4 Ah, 3.6 V lithium AA cell)
|Display Options||Reflective red target|
Combination target and BEACON LED
Tamperproof Bolt or BEACON Bolt LED
|Inrush Restraint Response Time||300 ms|
|Nominal Trip Rating||50 to 1,200 A|
|Trip Rating Tolerance||±10% (specified at +25°C [+77°F]) at the calibrated outside diameter|
|Trip Response Time||1 ms at trip rating (24 ms optional)|
|Minimum Reset (Operating) Current||3 A continuous, 1.5 A optional|
|Typical Reset Time||25 seconds at 10 A and above|
|Reset Type||Standard: Reset is triggered by current restoration for main phase sensor only.|
Optional: Three-phase reset automatically resets when current is restored in each phase of a three-phase set.
|Maximum Fault Current||25 kA for 10 cycles at 60 Hz|
|Mounting Diameter Ranges||Standard: 0.75" to 2.10" (19 mm to 53 mm)|
Optional large core: 1.8" to 2.5" (46 mm to 64 mm)
|Submersibility||15 ft (4.6 m)|
|Transformer Core||Vinyl-coated silicon steel|
|Temperature Range||–40° to +85°C (–40° to +185°F)|
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.