thermal circuit breaker / short-circuit / low-voltage / adjustable
short-circuit, low-voltage, adjustable, 3-pole
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%.
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