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| Article | Description / Summary |
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| UAP0033 | Under and Over Mains Frequency Alarm Operating Description The RLY 1 contact of the USC701 opens when the frequency is above SP1 a set value (such as 52Hz). The RLY 2 contact of the USC701 opens when the frequency is below SP2 a set value (such as 48Hz). If the two contacts are ... |