Thermal-magnetic circuit breaker 004671043

low-voltage3-poleshort-circuit

Thermal adjustment Low voltage moulded case circuit breakers have a wide thermal adjustment range, one of the largest on the market. The rated current ‘Ir ’ is continuously adjustable from 63% to 100% of this nominal current ‘In’. There are three main points of calibration marked at 63%, 80% and 100%. Magnetic adjustment An adjustable magnetic characteristics allows short-circuit protection to be matched to the load and supply characteristics, for example motor inrush current or generator short-circuit current.