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  AC Power Circuits 60 to 100 Hz, 120 to 700 VAC -- Single and Three Phase
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  Track, Line, Yard Arresters with Fail Safe Mechanisms
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  Code Line - Data Surge Protective Devices, Arresters
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  DC Power 12 to 1000 Volts
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  RF Co-Axial Lightning and Surge Arresters -- Recieve and Transmit
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  Electric Railway