Circuit breaker with pluggable trip module

The present invention relates to a circuit breaker (20, 40) comprising a handle (33) connected to a switching and trip mechanism (25) in the base unit (20a), and capable of opening and closing a system (24) of electrical contacts in normal operation, ensuring the interchangeability between a pluggable electronic trip module (20b) and/or a pluggable thermomagnetic trip module (20b), using the samestructural base unit (20a). The device comprises a main electric circuit "1" and a secondary circuit "2" or "2b", wherein the main circuit "1", using a current transformer (29) in the base unit (20a)which converts a current flowing in the main circuit "1" of the power line (23) to power the secondary circuit "2" or "2b", issues a trip command to protect the main circuit "1", opening the contact system (24) when predefined current limits are exceeded. 本发明涉及种断路器(20，40)，包括连接到基座单元(20a)中的开关及跳闸机构(25)的手柄(33)，并能够打开及关闭在正常操作中的电子触点系统(24)，以保证可插拔电子跳闸模块(20b)和/或可插拔热磁跳闸模块(20b)之间的互换性，使用相同结构的基座单元(20a)。装置包括主电路"1"及次级电路"2"或"2b"，其中，主电路"1"使