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US 12,763,236 B2Granted
Remote monitoring and indicating device for thermally protected metal oxide varistor
AssigneeDongguan Littelfuse Electronics Company Limited
InventorsLong Min, Dongjian Song, Libing Lu
Life of this patent
Estimating the term…
Abstract
A thermally protected metal oxide varistor (TMOV) is disclosed. The TMOV features one or more magnets connected to the arc shield of the TMOV and a sensor. Once a fault condition occurs, the arc shield movement places the magnets near the sensor, causing the sensor to indicate the fault condition, enabling a technician to repair or replace the TMOV.
Claims20
A surge protection device (SPD) comprising:
- a metal oxide varistor (MOV) comprising an electrode;
- a spring disposed adjacent the MOV, the spring comprising a contact lead to be coupled to the electrode by a solder paste;
- an arc shield disposed adjacent the spring, the arc shield to slide over the electrode in response to the solder paste being melted;
- a magnet disposed on the arc shield, the magnet to move simultaneous with movement of the arc shield;
- and
- a sensor to provide an indicator, wherein the magnet is proximate the sensor in response to the arc shield sliding over the electrode.
3 more elements
A thermally protected metal oxide varistor (TMOV) status system comprising:
- a TMOV, comprising:
- a sensor disposed inside an enclosure of the TMOV;
- and
- a magnet disposed on an arc shield of the TMOV, the magnet to move in concert with the arc shield, wherein the sensor provides an indication in response to the magnet being proximate the sensor;
- and
- a reporting circuit to issue a signal in response to receiving the indication.
3 more elements
A thermally protected metal oxide varistor (TMOV) comprising:
- a metal oxide varistor (MOV) comprising an electrode;
- a spring disposed adjacent the MOV, the spring comprising a contact lead to be coupled to the electrode by a solder paste;
- an arc shield disposed adjacent the spring, the arc shield comprising a tension spring to cause the arc shield to slide over the electrode in response to the solder paste being melted;
- a magnet disposed on the arc shield, the magnet to move simultaneous with movement of the arc shield;
- and
- a reed switch comprising a first blade and a second blade, wherein the magnet is proximate the reed switch in response to the arc shield moving over the electrode.
3 more elements
Dependencies are inferred from the claim text.