Abstract: Disclosed is a display device for a thermal magnetic type molded case circuit breaker capable to display a phase deficiency occurred on a line to a user such that the user rapidly deals with the phase deficiency and prevents loss caused by over-heating generated due to the phase deficiency. The thermal magnetic type molded case circuit breaker has a bimetal, which is bendable when heat is applied thereto, and a shifter coupled to an upper end of the bimetal and horizontally moved corresponding to a bending degree of the bimetal when over-current is applied thereto. The display device includes a power source for supplying electric power, a display for displaying the phase deficiency of the thermal magnetic type molded case circuit breaker by receiving power from the power source, a stationary contactor electrically connected to the power source and having a stationary contact, and a movable contactor electrically connected to the display and having a movable contact.

Abstract: Disclosed is an accessory device for a manual motor starter attached to one side of a body of the manual motor starter so as to perform various accessory functions, such as a forcible trip function for the manual motor starter by remotely switching the manual motor starter or a trip function for the manual motor starter when under-voltage occurs between a power source and load. A remotely switchable trip function and under-voltage trip function are achieved by using one accessory device.

Abstract: Disclosed is a display device for a thermal magnetic type molded case circuit breaker capable to display a phase deficiency occurred on a line to a user such that the user rapidly deals with the phase deficiency and prevents loss caused by over-heating generated due to the phase deficiency. The thermal magnetic type molded case circuit breaker has a bimetal, which is bendable when heat is applied thereto, and a shifter coupled to an upper end of the bimetal and horizontally moved corresponding to a bending degree of the bimetal when over-current is applied thereto. The display device includes a power source for supplying electric power, a display for displaying the phase deficiency of the thermal magnetic type molded case circuit breaker by receiving power from the power source, a stationary contactor electrically connected to the power source and having a stationary contact, and a movable contactor electrically connected to the display and having a movable contact.

Abstract: Disclosed is an accessory device for a manual motor starter attached to one side of a body of the manual motor starter so as to perform various accessory functions, such as a forcible trip function for the manual motor starter by remotely switching the manual motor starter or a trip function for the manual motor starter when under-voltage occurs between a power source and load. A remotely switchable trip function and an under-voltage trip function are achieved by using one accessory device.

Abstract: A mountable circuit breaker assembly and a method for mounting a circuit breaker on a base. A body portion of the circuit breaker is provided with rail insertion grooves on opposite sides thereof. The rail insertion grooves receive stepped portions of a corresponding pair of mounting rails mounted on a base. The circuit breaker body is retained relative to the mounting rails by engaging a protruding portion provided on one of the stepped portion of the mounting rails and the rail insertion grooves with a recessed portion provided on the other of the stepped portion of the mounting rails and the rail insertion grooves. The circuit breaker may be mounted onto a base on which the pair of mounting rails is provided by sliding the circuit breaker body between the mounting rails so that the respective stepped portions of the mounting rails are received in the respective rail insertion grooves provided on the circuit breaker body.