SEL
AR360

AR360 AutoRANGER® Fault Indicators

Sales and Ordering Information

Please contact Customer Service at
SEL Lake Zurich, Illinois at +1.847.362.8304

or by email at csrlz@selinc.com

AR360 Fault Indicators provide super-bright flashing LED displays with 360 degrees of visibility. A distinctive "rotational" flash sequence enhances fault display location. Advanced micro processor technology senses and measures load and detects faults on lightly loaded line with as little as 50 A of current. The AR360 steps up its trip threshold as load increases to remain secure through 1200 A loads.

Permanent and temporary faults are identified separately through the use of  red and amber LEDs and flash patterns. The AR360 identifies temporary faults with flashing amber-colored LEDs. Permanent faults are indicated by a combination of alternating red and amber LEDs. Click the Options tab below to view videos showing the temporary and permanent LEDs in action.

AR360 Fault Indicators are quick and easy to install with one hot stick. There are no clamps to disassemble. No extra hardware is needed. Detect temporary faults before they become outages, and speed restoration after permanent faults with AR360 Fault Indicators.

  • 360-Degree Visibility: Six ultra-bright, wide-angle LEDs provide overlapping fields of light that collectively yield nearly the same light intensity regardless of the observer’s viewing angle. The LED flashing sequence provides a distinctive rotational motion effect that enhances permanent fault display visibility.
  • Identify Temporary and Permanent Faults: Distinct temporary (amber) and permanent (red and amber) fault indication patterns provide the flexibility of locating the cause of permanent and self-clearing faults.
  • Auto-Adjusting Trip-Level Selection: Fault indicators dynamically optimize sensitivity and security, based on measurements of load. Can detect faults with as little as 50 A of current when loads are light. Automatically steps up its trip threshold to remain secure for 1200 A loads.
Trip Value Range 50 to 1200 A
System Voltage Range (L-L) 4160 V to 34.5 kV
Maximum Fault Current 25 kA for 10 cycles
Battery High-capacity, 20-year shelf life
Flashing Hours 1800+ hours
Reset Time 4 hours standard; others available upon request*
Trip Response Time 24ms, nominal
Outer Diameter Clamping Range 0.406 to 3.81 cm (0.160 to 1.50 in)
Approximate Weight 825 g (1.82 lbs)
Temperature Range —40° to +85°C
* Extended time-out may affect battery life. Please consult factory.

AR360 Permanent Fault Display Video

 

AR360 Temporary Fault Display Video

Principle of Operation

After you install the AR360 with a single hot stick, its sophisticated microprocessor goes to work. It samples the current and automatically adjusts its trip value for secure and dependable performance.

Faults start a red-amber alternating flashing sequence that appears to rotate around the device. After two minutes, the microprocessor checks for voltage and load current to determine if the fault was temporary or permanent. Permanent faults cause the red-amber sequence to continue. Temporary faults switch the flashing sequence to amber only. After a time-out period, the flashing automatically stops.

AR360 Principles of Operation 

Schweitzer Engineering Laboratories, Inc.

2350 NE Hopkins Court
Pullman, WA 99163 - USA
Phone: +1.509.332.1890
Fax: +1.509.332.7990
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