Zhejiang Chint Electrics Co., Ltd.

Seari Electric Technology Co., Ltd.

Hong Xi

Ping Zeng

Feng Jia

Changxun Gu

Di Zhang

Huiyu Ji

Beiming Huang

Jianrong Lin

Jiexin Zheng

Sihong Li

An indication device of an electric switch comprises an indication component (), a driving component () and a positioning component (). The indication component () has at least three indication positions. Each indication position corresponds to one state of the electric switch, and the indication component () shows one indication mark at each indication position. The indication device of electric switch uses a single indication component () having at least three indication positions, and the third position is provided via deformation of the indication component () itself, thus realizing a simple structure and low manufacturing cost.

Indication device of electric switch

The present invention discloses a protection module for a control and protective switching device, comprising a control power supply processing unit, an auxiliary power supply processing unit, a power supply converting unit, a signal processing and controlling unit, a trip electromagnet driving unit, a control electromagnet driving unit, and a man-machine interaction device. The control power supply processing unit and the auxiliary power supply processing unit receive a power supply signal from a high voltage power supply, and process the signal for supplying power for other components. The signal processing and controlling unit receives a mutual-induction signal from a current mutual inductor, outputs a first control signal and a second control signal to the trip electromagnet driving unit and the control electromagnet driving unit, and receives a first feedback signal and a second feedback signal from an operation mechanism and a control electromagnet. The trip electromagnet driving unit outputs a first operation signal to a trip electromagnet, and the trip electromagnet outputs a mechanical signal to the operation mechanism. The control electromagnet driving unit outputs a second operation signal to the control electromagnet. The man-machine interaction device performs signal interaction with the signal processing and controlling unit.

Protection module for control and protective switching device

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.

Control and protection device for low-voltage electrical appliance

The present invention discloses a contact structure of a low-voltage electrical apparatus. The contact structure is in a dual-breakpoint form, and comprises: two U-shaped static contacts, the U-shaped static contact enabling the current direction in the static contact to be opposite to the current direction in a movable contact; a contact bridge; two movable contacts, disposed on the contact bridge, and respectively corresponding to the two static contacts; a contact support member, disposed on the movable contacts and connected to the movable contacts; two main contact springs, symmetrically disposed under the movable contacts and forming an angle with the contact bridge; and a spring support member, disposed under the two movable contacts and connected to the two main contact springs. At a contact position of the static contact and the movable contact and at a repulsed open position of the static contact and the movable contact, the angle between the main contact spring and the contact bridge is between &#x2212;&#x3b2; and +&#x3b1;.

Contact structure of low-voltage electrical apparatus

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Shanghai, China

Hong Xi