The AR-OH AutoRANGER is a self-adjusting fault indicator applied on overhead systems. It automatically selects a trip threshold based on the sampled load current. To become active and ready to respond to an event, the AutoRANGER must be installed on an energized line long enough to allow load current sampling and selection of a trip threshold. After an event has occurred, the AR-OH samples system conditions to determine a display notification of either a momentary or permanent event occurrence.
A momentary event is indicated by a single super bright, amber-colored flashing LED. Permanent events are indicated by two super bright red flashing LEDs. The flash time of both event types (momentary or permanent) can be selected to best coordinate with line crew response times. Available flash times are noted in the ordering table.
The AR-OH uses inrush restraint technology to prevent the AR-OH from tripping on reclosing attempts. A timed-reset display provides protection from false resets resulting from backfeed current voltage fields or post fault automatic system restoration. Manual LED test activation or flash clearing is accomplished using test tool CRSRTT (sold separately).
Overhead Fault Location—Apply AR-OH Overhead AutoRANGERs across your entire overhead system as an economical solution to reduce fault-finding time and improve reliability metrics. The AutoRANGER logic automatically selects the best trip threshold based on sampled load current and reduces effort of coordinating FCIs with various protection schemes. The AR-OH bright LED display provides higher visibility fault indication, day or night.
Momentary Fault Detection—Improve system reliability by tracking down momentary faults before they become permanent outages. The AR-OH are equipped with simple-to-interpret displays that provide distinct flash patterns for both permanent and momentary faults.
Distribution Circuit Reliability Improvement—Deploy the AR-OH on distribution circuits up to 69 kV.
|Trip Threshold Range||50 to 1200 A|
|System Voltage Range (L-L)||4160 V to 69 kV|
|Maximum Fault Current||25 kA for 10 Cycles|
|Trip Response Time||24 ms|
|Permanent Flash-Clearing Times:|
|50 and 100 A Trip Levels||8 Hours|
|200 and 1200 A Trip Levels||4 Hours AR360-4, 8 Hours AR360-8|
|Temporary Flash-Clearing Times||0, 4, 8, 16, or 24 Hours|
|Outer Diameter Clamping Range||0.162" to 1.50"|
|Battery||3.6 V High-Capacity 8.5 Ah Lithium Battery With a 20-Year Shelf Life|
|Approximate Weight||575 g (1.27 lbs)|
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