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Protective device for track circuitry ST-400 type, ST-500 type

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This is a protective device (arrester) that protects signal cables and equipment from irregular voltage that may enter track circuitry.

【Dimensions】 W120 × D60 × H73.5 (incl. holder)

 
 
 
Main performance characteristics
 
Item ST-400 ST-500
Use for AF track circuit equipment concentration type 100Hz, AF overlay track circuit (equipment concentration type )
AC discharge spark-over voltage 320 to 460V 425 to 565V
Impulse protection level 10/200μs・3000V applied at 1400V or less 10/200μs・3000V applied at 1600V or less
Current withstand capacity AC20A, 80s, 30 times at 10 min. intervals