Project Description

Non-Isolated Audible Frequency (AF) Track Circuit Device

It is a non-insulated track circuit device designed for AC or DC train section where there is electromagnetic interference (mainly generated from the harmonic wave of the electric line power supply). It detects the presence/absence of the train, does not carry a speed code.

Impedance Bond(B2-500)

Impedance Bond(B2-500)

Product Information

A device used to return the electric wire return current to the 25KV 60Hz train section.

Online Inquiry


  • Detecting the presence of trains to prevent accidents
  • Achieve safe operation of trains by communicating the train speed and vehicle operation information to the locomotive


Category Rating
Rated Current Continuous rated current: more than AC 600A, Rated Current more than 1,000A For 2 min.
Coil Impedence 3.0mΩ or less at AC 60Hz, 1.5mΩ or less at DC
At the corresponding track circuit frequency: 7.0Ω or more
Installation Installed with 1,500m inverval between stations by type
Type A(1,699㎐), B(2,296㎐), C(1,996㎐), D(2,593㎐)
Size(㎜) 577(W) × 288(L) × 154.5(H)
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