IP Library Granted Patent US 7,948,719
Granted Patent B2
US 7,948,719 · App. 12/251,651 · Granted May 24, 2011

Solid state circuit protection system that works with arc fault circuit interrupter

Assignee: Masco Corporation
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Quick Facts
Patent No.
US 7,948,719
App. No.
12/251,651
Granted
May 24, 2011
Kind
B2
Abstract

An electric circuit includes a load, a solid state device, and a control for opening the circuit such that current will not flow through the solid state device, and for facilitating flow of current to bypass said solid state device and provide a current path to an arc fault circuit interrupter. A bypass includes a normally opened switch which is closed to provide current to the arc fault circuit interrupter.

Claims (19)

1. An electric circuit to be used with an arc fault circuit interrupter including:

a load;

a first switch controlling a flow of current along a primary current path from a power source to the load, wherein the first switch is a solid state switch;

a second switch connected in parallel to the first switch, the second switch facilitating a flow of current along a secondary current path to bypass the first switch; and

an arc fault circuit interrupter device upstream of the first switch and the second switch, wherein the secondary switch enables the arc fault circuit interrupter device to detect an arc fault condition downstream of the first switch and the second switch via the secondary current path.

2. The electric circuit as set forth in claim 1 , wherein the second switch is normally OFF, but is turned ON when an undesirably high current is sensed downstream of the first switch and the second switch.

3. The electric circuit as set forth in claim 2 , wherein the second switch is turned ON after said the first switch is turned OFF.

4. The electric circuit as set forth in claim 2 , wherein the first switch includes a MOSFET.

5. The electric circuit as set forth in claim 2 , wherein a current sensor senses whether a current flowing to the load is undesirably high, and commands a switch control to control the first switch and the second switch to cause current to bypass the first switch along the secondary current path.

6. An electric circuit including:

a load;

an arc fault circuit interrupter;

a solid state device;

a switch for turning OFF such that current will not flow through said solid state device, and for facilitating flow of current to bypass said solid state device and provide a current path to enable the arc fault circuit interrupter to detect an arc fault condition downstream of the solid state device;

said bypass line includes a switch which is normally OFF, but which is turned ON when an undesirably high current is sensed, wherein the solid state device and the switch are downstream of the arc fault circuit interrupter;

said switch on said bypass line is turned ON after said switch for said solid state device is turned OFF;

said switch for said solid state device is a bi-directional switch;

said solid state device is a MOSFET; and

a current sensor senses current on the electric circuit and communicates with a switch control which controls said switch and said solid state device.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 7, 2012
From: LIBERTY HARDWARE MFG. CORP.
To: ENOCEAN GMBH
Reel/Frame 028742/0692 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 27, 2012
From: MASCO CORPORATION
To: LIBERTY HARDWARE MFG. CORP.
Reel/Frame 027951/0353 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 15, 2008
From: XU, JIAN
To: MASCO CORPORATION
Reel/Frame 021684/0124 →
Continuity (1)
Related Publication 20100091418A1 · Apr 15, 2010