Externally controlled thermal trip device, method and application for varistors
AssigneesShanghai ASP Lighting Protective Technology Co., Ltd., MERSEN USA EP Corp.
InventorTing Pan
Life of this patent
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Abstract
An externally-controllable thermal tripping device comprising a voltage dependent resistor including a voltage dependent resistor chip; a thermal tripper including a tripping electrode; and a controllable heating element. The tripping electrode is connected to an electrode of the voltage dependent resistor chip through a meltable welding material, and the controllable heating element is controlled by an external control device to generate heat and transmit generated heat to a commissure of said welding material to melt said welding material and electrically disconnect the tripping electrode from the voltage dependent resistor chip.
Claims9
An externally-controllable thermal tripping device comprising:
- a voltage dependent resistor including a voltage dependent resistor chip;
- a thermal tripper including a tripping electrode;
- and
- a controllable heating element,
- wherein the tripping electrode is connected to an electrode of said voltage dependent resistor chip through a meltable welding material, and
- wherein said controllable heating element is controlled by an external control device to generate heat and transmit generated heat to a commissure of said welding material to melt said welding material and make said tripping electrode electrically disconnected from said voltage dependent resistor chip.
A method of operating an externally-controllable thermal tripping device applicable to a voltage dependent resistor, said method comprising:
- disposing a controllable heating element, which can be controlled externally, inside said voltage dependent resistor;
- controlling said controllable heating element to generate heat;
- said controllable heating element transmitting heat to a commissure of a meltable welding material inside said voltage dependent resistor;
- and
- said voltage dependent resistor actively performing thermal separating while said meltable welding material is melted.
Dependencies are inferred from the claim text.