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The STF Series of Active Tracking Filters are designed to safeguard medical equipment against damaging low-energy voltage transients and high-frequency noise. The filters continuously track the input AC power line at all locations on the sinewave and instantaneously counter noise. By reducing normal mode transients to ±5 volts and absorbing large bandwidths of noise, they recreate a well-regulated sinusoidal waveform isolated from input disturbances. Available in one- and three-phase configurations with input voltage of 120, 240, and 480 VAC at 50/60 Hz, STF Power Filters allow users to meet a wide range of power quality requirements.

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