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ICM Controls ICM401 Three-Phase Line Voltage Monitor Offering Protection Against Phase Loss/Reversal and Unbalance; 50/60 Hz, 190-600 VAC (18-30 Control VAC): Household Furnace Accessories: Amazon.com: Industrial & Scientific
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ICM450A - ICM Controls ICM450A - ICM450A 3 Phase Line Voltage Monitor - Delay on Break Timer, 0-10 Minutes (English & Spanish)
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