
1336E-BRF20-AE-EN A-B Termination Unit
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IN STOCK1336E-BRF20-AE-EN A-B Termination Unit
The 1492-SP line features the unique ability to achieve short-circuit interruptions far more effectively than conventional breakers. In conventional circuit breakers, the short-circuit interruption time required is approximately one or two half cycles of an AC sine wave. When the contacts open, the resulting arc continues to burn until the current level passes through zero. The arc may reignite because of the insufficient width of the contact gap. The current that flows until the arc is extinguished produces a heating effect proportional to the I2 t value (let-through-energy) of the fault current. The 1492-SP device is designed to substantially reduce the amount of letthrough-current and the resulting let-through-energy that can damage protected components. The 1492-SP has the ability to interrupt short-circuit current within the first half cycle of the fault. Limiting let-through-energy will protect against the harmful effects of overcurrent and is focused primarily on avoiding: • excessive heat and • mechanical damage.
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