1336E-BRF05-AA-EN-HA2-L8E A-B Control Unit
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IN STOCK1336E-BRF05-AA-EN-HA2-L8E A-B Control Unit
The standard tripping characteristic for Bulletin 1492-SP is Type C. Type C has a magnetic trip activated at 5…10 times the rated current of the circuit breaker. The reference temperature for the thermal tripping characteristics is 30 °C. The Type C characteristic will suit most applications. Use the following steps to determine the current rating for the breaker. 1. Take the rated current of the equipment. For example, 10 A. 2. Take the ambient temperature of the 1492-SP location (e.g., 50 °C (122 °F)). 3. Refer to the table below, which rerates the 1492-SP current for the given ambient temperature. Influence of the ambient temperature on the thermal tripping characteristic.4. All other specifications for standard Bulletin1492-SP products remain unchanged. The ambient temperature derating applies to applications of the device as an IEC Miniature Circuit Breaker (MCB) following 60 947- 2 and as a supplementary protector to UL1077/CSA 22.2 No 235. Ambient temperature refers to the free air temperature in contact with the 1492-SP. Contact Rockwell Automation for ambient temperatures beyond those shown above. 5. Select the 1492-SP with the next available rating at the given ambient temperature. In this example, it would be 13 A. With this selection, adequate overload protection is provided and nuisance tripping by thermal influences is avoided. 6. Check that transients of the system do not exceed the “must hold” value of the trip characteristic. This will eliminate nuisance tripping by magnetic influences. The Type C characteristic will be adequate for most applications. Refer to the Selection Tables on page 12.
The structure and details of the product：
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