Surge suppressor, electronic device, and method with components oriented for improved safety
Improvements to surge suppressors and other electronic devices with thermal cutoffs to reduce the risk of burning through the outer enclosure in the event electrical components such as current diverters or MOVs over heat. Improvements include revised layouts or orientations of components so that neighboring components or surfaces are at a closer electrical potential or so that exteriors of thermal cutoffs are on the protected side of the thermal cutoffs. Redundant thermal cutoffs or thermal cutoffs with non-conducting exteriors may be used and thermal cutoffs may be sandwiched between current diverters in blocks so that the sides of the current diverters that are adjacent to the thermal cutoffs are normally at the same electrical potential as the thermal cutoffs.
1 . A method of improving the safety of a surge suppressor configured to pass an electrical current to at least one electronic device and to absorb voltage spikes in the electrical current thereby protecting the at least one electronic device from the voltage spikes, the surge suppressor comprising a plurality of electrical components, the method comprising in any order at least one of the steps of:
revising a layout of the electrical components so that a plurality of MOVs are at a closer electrical potential to adjacent electrical components; and
changing the orientation of at least one thermal cutoff so that the exterior of each thermal cutoff is electrically connected to the protected side of the thermal cutoff.
2 . The method of claim 1 comprising in any order both of the steps of:
revising a layout of the electrical components so that a plurality of MOVs are at a closer electrical potential to adjacent electrical components; and
changing the orientation of at least one thermal cutoff so that the exterior of each thermal cutoff is electrically connected to the protected side of the thermal cutoff.
3 . The method of claim 1 comprising at least the step of:
revising a layout of the electrical components so that a plurality of MOVs are at a closer electrical potential to adjacent electrical components.
4 . The method of claim 3 wherein each MOV has a first side and a second side, and at least a plurality of MOVs are oriented so that the first side is adjacent to a thermal cutoff, wherein the step of revising includes repositioning at least one MOV so that the first side of each MOV that is adjacent to a thermal cutoff is normally at substantially the same electrical potential as the adjacent thermal cutoff.
5 . The method of claim 3 further comprising the step of replacing at least one thermal cutoff having an electrically conducting exterior with a thermal cutoff having a non-conducting exterior.
6 . The method of claim 3 further comprising the step of advertising that the surge suppressor is safer.
7 . The method of claim 1 comprising at least the step of:
changing the orientation of at least one thermal cutoff so that the exterior of each thermal cutoff is electrically connected to the protected side of the thermal cutoff.
8 . The method of claim 7 further comprising the step of advertising that the surge suppressor is safer.
9 . The method of claim 1 further comprising the step of installing a second thermal cutoff in series with a first thermal cutoff wherein if either thermal cutoff opens, the electrical current will be interrupted.
10 . The method of claim 1 further comprising the step of repositioning at least one of a thermal cutoff and an MOV for better thermal contact between the MOV and the thermal cutoff to provide quicker operation of the thermal cutoff.
11 . An electronic device having electrical components including a plurality of thermal cutoffs, each thermal cutoff having a metal exterior, a protected side, and an unprotected side, wherein the exterior of each thermal cutoff is electrically connected to the protected side of the same thermal cutoff.
12 . The electronic device of claim 11 wherein the electronic device is a surge suppressor comprising an input having at least a first conductor and a second conductor, an output configured to pass an electrical current, an outer enclosure, and at least one current diverter wired between the first conductor and the second conductor.
13 . The surge suppressor of claim 12 wherein
the input comprises a line-in plug electrically connected to the first conductor and to the second conductor, wherein the first conductor is configured to connect to line power and the second conductor is configured to connect to neutral;
the output comprises a plurality of output receptacles, wherein the at least one thermal cutoff is wired so that when the at least one thermal cutoff opens, electrical current to the output receptacles is interrupted; and
the surge suppressor is configured to pass the electrical current from the input to the output and to at least one electronic device electrically connected to the output and to absorb voltage spikes in the electrical current thereby protecting the at least one electronic device from the voltage spikes.
14 . The electronic device of claim 11 comprising a first current diverter and a second current diverter, wherein at least one thermal cutoff is sandwiched between the first current diverter and the second current diverter.
15 . The electronic device of claim 11 comprising a first current diverter and a second current diverter, wherein the first current diverter and the second current diverter each have a first side and a second side, and the first current diverter and the second current diverter are each located and oriented so that the first side is adjacent to at least one thermal cutoff, wherein the first side of each of the first and second current diverters is normally at substantially the same electrical potential as the adjacent at least one thermal cutoff.
16 . The electronic device of claim 11 wherein each thermal cutoff is arranged in a block with at least a first current diverter and a second current diverter, wherein each thermal cutoff is located in between the first current diverter and the second current diverter in the block, wherein at least the first current diverter and the second current diverter each have a first side and a second side wherein the first side is normally at substantially the same electrical potential as the thermal cutoff in the same block, and wherein at least the thermal cutoff, the first current diverter and the second current diverter are arranged within each block so that the first side of the first current diverter and the first side of the second current diverter are adjacent to the thermal cutoff.
17 . A surge suppressor comprising at least one thermal cutoff and at least a first MOV and a second MOV, wherein the thermal cutoff is located in between and adjacent to the first MOV and the second MOV, wherein the first MOV and the second MOV each have a first side and a second side, wherein the first side is normally at substantially the same electrical potential as the thermal cutoff, and wherein at least the thermal cutoff, the first MOV and the second MOV are arranged so that the first side of the first MOV and the first side of the second MOV are adjacent to the thermal cutoff.
18 . The surge suppressor of claim 17 comprising a plurality of thermal cutoffs, wherein each thermal cutoff is arranged in a block with at least a first MOV and a second MOV, wherein each thermal cutoff is located in between the first MOV and the second MOV in the block, wherein at least the first MOV and the second MOV each have a first side and a second side wherein the first side is normally at substantially the same electrical potential as the thermal cutoff in the same block, and wherein at least the thermal cutoff, the first MOV and the second MOV are arranged within each block so that the first side of the first MOV and the first side of the second MOV are adjacent to the thermal cutoff.
19 . The surge suppressor of claim 18 wherein each second side is electrically connected to one of a hot line in and a neutral in, and wherein at least a plurality of the blocks are arranged so that the blocks are adjacent to each other and so that MOVs in adjacent blocks are arranged so that their second sides are adjacent to each other.
20 . The surge suppressor of claim 17 wherein the thermal cutoff has a metal exterior that is electrically connected to the protected side of the thermal cutoff.