BFI-035 Battery-Powered Line Fault Indicator

BFI-035 Battery-Powered Line Fault Indicator

Application Battery-powered fault indication for overhead distribution lines
Network voltage range 6–35 kV
Short-circuit trip current 100 / 200 / 400 / 800 A selectable
Earth-fault trip current 5 / 10 / 25 / 50 A selectable
Response time 60–300 ms selectable
Sensing principle Magnetic-field current sensing with optional voltage-presence reset
Indication Amber/red LED with low-battery diagnostic flash
Power supply Replaceable 3.6 V lithium cell
Battery life Up to 12 years standby or 1200 h indication, depending on duty cycle
Reset methods Timer, magnetic manual reset, voltage return reset
Conductor diameter 6–28 mm
Protection class IP67
Operating temperature −40 °C…+70 °C
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Description

Battery-powered fault indication for lightly loaded overhead feeders

The BFI-035 is a battery-powered line fault indicator for medium-voltage overhead feeders. It is intended for locations where line current may be low or intermittent and energy harvesting is not reliable enough.

A diagnostic flash sequence allows field crews to distinguish a true fault indication from battery service requirements. Settings can be selected during commissioning to match feeder protection coordination.

Typical applications

  • Stable operation on lightly loaded feeders
  • Replaceable lithium battery for planned maintenance cycles
  • Simple visual indication without external power
  • Selectable thresholds for different feeder types
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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