140M-I8E-D10-CX

The 140M-I8E-D10-CX circuit breaker is a molded case circuit breaker with auxiliary contacts that has been designed to provide motor overload protection and general branch circuit protection to different devices or specifically to a motor. This breaker has been designed by Allen-Bradley and included in the Frame I line of equipment in the 140M series. This breaker operates at a specific voltage of 400 to 525 Volts and an interrupting current of 70 to 30 Kiloamps. The Allen-Bradley 140M-I8E-D10-CX molded case circuit breaker with auxiliary contacts includes contacts that are in the bottom front (1 N.O. and 1 N.C.) and a placeholder on the right side. This is an additional feature that can be selected when ordering the equipment. Before the installation of this breaker, it is important to perform electrical operational tests on both the breaker and the motor to ensure that both are compatible and that there will not be any inconvenience to the equipment compatibility.

The detection mechanism of the Allen-Bradley 140M-I8E-D10-CX molded case circuit breaker with auxiliary contacts consists of an adjustable thermal and a fixed magnetic mechanism. For the thermal mechanism, the circuit breaker employs 2 bimetal bands that get a certain amount of heat from the current. Magnets are employed to detect short-circuit currents. This breaker can be used when attached to a motor or used with other breakers to protect a whole circuit. It is recommended to use copper and aluminum wiring that supports operations at temperatures above 75 degrees Celsius. The Allen-Bradley 140M-I8E-D10-CX molded case circuit breaker with auxiliary contacts can be installed in a housing or cabinet for further protection. Extremely high or low temperatures can affect the thermal detection mechanism and tripping action.