MODEL 272 3-Phase Current Unbalance Detector
■DESCRIPTION
●The Model 272 3-Phase Current Unbalance Detector monitors 3-phase lines to detect an unbalanced current. It can also monitor three separate single phase lines for equal current levels. The percentage of unbalance is adjustable from 2% to 25% by adjusting a front panel control. An unbalance greater than this setting energizes the relay.
●An adjustable trip delay of 0.5 to 10 seconds is also provided. For optimum performance, operating currents should be kept in the 1 to 5 amps range. However, zero current on each phase is considered to be a balanced condition.
●Continuous currents, up to 10 amps per phase, will not damage the unit, nor will current surges up to 40 amps for 2 seconds. The contacts are automatically reset when the unbalanced condition is corrected.
●A supply voltage of 24 or 120VAC is required for this unit.
■Adjustable Trip Delay
■Adjustable Unbalance Percentage
■Automatic Reset
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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11/2011 |
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515 KB |
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