20A 3 pole 5kA Miniature Circuit Breaker

Circuit Breaker Information

• Model: ATOCLXB3-20
• Rated Current: 20 amp
• Rated Voltage: 277/480V AC, 50Hz/ 60Hz
• Number of poles: 3 pole
• 5 kA short circuit interrupting capacity
• Complete range of UL 1077 listed and 35mm DIN rail mounted
• It can be manually switched ON and OFF as similar to normal switch if necessary
• Thermal-magnetic overcurrent protection, three levels of short circuit protection, categorized by B, C and D curves

Technical Data

Circuit Breaker Dimension (Unit: mm)

Tips: Motor protection circuit breaker selection
There are two features for motor as follows: Firstly, starting current is several times of rated current. Secondly, it has certain overload capacity. In order to ensure motor operation is reliable, circuit breaker should be chosen in accordance with these two features of motor.
How to choose a motor protective circuit breaker?

1. The long time delay action current setting value is determined by the rated current of motor.
2. The returnable time of 6 times of long time delay action current setting value of circuit breaker is larger than the actual starting time of motor.
3. Instantaneous action current setting value of circuit breaker: Cage motor should be 8 to 15 times as large as the rated current of releaser; winding motor should be 3 to 6 times as large as the rated current of releaser.