Fireproof separator board and plug-based circuit interrupter employing the fireproof board

Patent metadata

Field	Value
Publication number	US-9713273-B2
Application number	US-201414302685-A
Country	US
Kind code	B2
Filing date	Jun 12, 2014
Priority date	May 9, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

This invention provides a fireproof separator board, which is made of a flame-retardant, high temperature resistant material and disposed within an insulating casing of an electrical device, for preventing the heat generated by the electrical components of the electrical device from being conducted to the insulating casing. This invention also provides a plug-based circuit interrupter that includes the fireproof separator board. The fireproof separator board and the plug-based circuit interrupter of this invention can effectively prevent high temperature and fire caused by the electrical components that could melt the casing.

First claim

What is claimed is:

1. A plug-based circuit interrupter, comprising:
an insulating casing;
a control circuit board, disposed horizontally inside the insulating casing, the control circuit board including a first contact terminal, a second contact terminal, and a varistor;
a first metal insertion plate and a second metal insertion plate, passing through a bottom of the insulating casing and being disposed vertically, the first and second metal insertion plates being connected to or disconnected from the respective first and second contact terminals to close or open an electrical circuit; and
a fireproof separator board, formed of a flame retardant, high temperature resistant material, disposed within the insulating casing, for preventing heat generated by the first and second contact terminals from being conducted to the insulating casing.

2. The plug-based circuit interrupter of claim 1 , wherein the fireproof separator board is formed of epoxy board, asbestos board, mica plate, metal plate, or a ceramic material.

3. The plug-based circuit interrupter of claim 1 , comprising two fireproof separator boards, the two fireproof separator boards being disposed vertically and respectively between two side walls of the insulating casing and the first and second contact terminals.

4. The plug-based circuit interrupter of claim 1 , wherein the fireproof separator board is disposed below the control circuit board and parallel to the control circuit board, and wherein the first and second metal insertion plates respectively pass through the fireproof separator board.

5. The plug-based circuit interrupter of claim 4 , wherein the fireproof separator board extends below the varistor of the control circuit board.

6. The plug-based circuit interrupter of claim 1 , wherein an end of the fireproof separator board near the casing is disposed vertically between the first and second contact terminals.

7. A plug-based circuit interrupter, comprising:
an insulating casing;
a control circuit board disposed inside the insulating casing and including a varistor;
a stationary contact terminal and a moving contact terminal, disposed inside the insulating casing and above the control circuit board; and
a fireproof separator board, disposed above the stationary contact terminal and the moving contact terminal, and cooperating with the control circuit board to prevent heat generated by the stationary contact terminal and the moving contact terminal from being conducted to the insulating casing.

8. The plug-based circuit interrupter of claim 7 , wherein the fireproof separator board extends above the varistor of the control circuit board.

9. The plug-based circuit interrupter of claim 7 , wherein the fireproof separator board is formed of epoxy board, asbestos board, mica plate, metal plate, or a ceramic material.

Assignees

• Li Chengli
• Chengli Li

Inventors

• Li Chengli
• Lin Fei
• Zhang Xiaoming

Classifications

• H05K5/0209 Primary

  Thermal insulation, e.g. for fire protection or for fire containment or for high temperature environments · CPC title

• H05K5/0213 Primary

  Venting apertures; Constructional details thereof · CPC title

• H02H9/005

  avoiding undesired transient conditions · CPC title