CONTROL AND PROTECTION DEVICE FOR LOW-VOLTAGE ELECTRICAL APPLIANCE

摘要

Disclosed is a control and protection device for a low-voltage electrical apparatus, comprising a pedestal and a control and protection module. The control and protection module may be plugged into the pedestal and is replaceable. The pedestal comprises a base and a housing, and is further provided with a moving contact, a static contact, and a current conductor connected to a main circuit current; a control electromagnet operation mechanism for controlling close and open of the moving contact and the static contact according to a control signal, and maintaining a close or open status of the moving contact and the static contact; a manual operation knob providing a control signal for controlling the close and open of the moving contact and the static contact; a control contact connected to the manual operation knob; and a current sensor for detecting a current that flows through the main circuit current conductor and generating a sensing signal. The control and protection device further comprises: a signal processing unit for controlling a state of the control electromagnet according to the sensing signal via an electrical circuit; and a tripping device for controlling actions of the operation mechanism with a mechanical connection in response to the signal processing unit. The current sensor has a secondary circuit connection detection device.

主权项

1. A control and protection device of a low-voltage electrical apparatus, comprising:
a pedestal, the pedestal having a base and a housing, the pedestal including therein:
a moving contact, a static contact, and a current conductor connecting to a main circuit;a control electromagnet and an operation mechanism, the control electromagnet and the operation mechanism controlling the moving contact and the static contact to close or open in response to a control signal, the control electromagnet and the operation mechanism maintaining the close or open statuses of the moving contact and the static contact;a manual operation knob, providing the control signal for controlling the close or open of the moving contact and the static contact;a control contact connected to the manual operation knob;a current sensor, detecting a current that flows through the current conductor connecting to the main circuit and generating a sensing signal; a control and protection module, the control and protection module being pluggable and replaceable, the control and protection module being plugged in the pedestal, the control and protection module including therein:
a signal processing unit, controlling the status of the control electromagnet by electrical circuits in response to the sensing signal;a tripping device, controlling operations of the operation mechanism through mechanical connection in response to the signal processing unit.