LFS-670 Remote Line Fault Sensor

LFS-670 Remote Line Fault Sensor

Application Remote fault detection and feeder monitoring on overhead lines
Network voltage range 6–70 kV, 50/60 Hz
Measured values Load current trend, voltage presence, conductor temperature, fault events
Short-circuit pickup 200–1200 A adjustable in 50 A steps
Earth-fault pickup 5–120 A adjustable, subject to grounding system and network study
Communication LTE-M / NB-IoT or sub-GHz radio to pole-mounted gateway
Protocols via gateway IEC 60870-5-104, Modbus TCP, DNP3 TCP optional
Event time tagging 10 ms internal event resolution; SCADA time accuracy depends on gateway synchronization
Power supply Lithium battery with low-power radio mode
Expected battery life Up to 8 years depending on reporting interval and event rate
Protection class IP68, outdoor UV-resistant enclosure
Operating temperature −40 °C…+75 °C
Category:

Description

Remote line fault sensor for feeder monitoring and outage response

The LFS-670 is a smart line fault sensor designed for utilities that need remote indication from long overhead feeders. It detects fault passage locally and transmits event data to a control center or SCADA gateway.

In addition to fault alarms, the sensor can report load-current trends and voltage presence. This helps operators confirm whether a feeder section is energized after switching or restoration work.

Typical applications

  • Remote line fault indication for rural and hard-to-access feeders
  • Configurable reporting interval to balance visibility and battery life
  • Event logs for outage analysis and crew dispatch
  • Distribution automation and feeder monitoring projects
Engineering note: Trip thresholds, reset logic, communication architecture, insulation coordination, EMC performance and installation method must be validated against the target feeder, grounding method, protection settings and applicable utility standards before final specification.

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