Pyro fuse with quick interruption of electrically faulted circuit
AssigneeLittelfuse, Inc.
InventorMichael Fasano
Life of this patent
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Abstract
A circuit protection device may include a current sensor and a pyrotechnic fuse connected to the current sensor, wherein the pyrotechnic fuse includes a housing and a busbar extending through the housing, and wherein the busbar is positioned between a first chamber and a second chamber. The circuit protection device may further include a piston within the first chamber, wherein the piston is operable to receive a force from a squib, and wherein in response to a signal from the current sensor, the force from the squib causes the piston to create an opening in the busbar.
Claims20
A circuit protection device, comprising:
- a current sensor;
- a pyrotechnic fuse connected to the current sensor, the pyrotechnic fuse comprising:
- a housing;
- a busbar extending through the housing, wherein the busbar is positioned between a first chamber and a second chamber;
- and
- a piston within the first chamber, wherein the piston is operable to receive a force from a squib, and wherein in response to a signal from the current sensor, the force from the squib causes the piston to create an opening in the busbar.
A pyrotechnic fuse, comprising:
- a housing;
- a busbar extending through the housing, wherein the busbar is positioned between a first chamber defined by a first section of the housing and a second chamber defined by a second section of the housing;
- and
- a piston within the first chamber, wherein the piston is operable to receive a force from a squib coupled to the first section of the housing, and wherein in response to a signal from a current sensor, the force from the squib causes the piston to create an opening in the busbar.
A method, comprising:
- connecting a pyrotechnic fuse to a current sensor, the pyrotechnic fuse comprising a busbar extending through a housing, wherein the busbar is positioned between a first chamber and a second chamber;
- receiving a signal from the current sensor that an overcurrent event has occurred;
- and
- in response to the signal from the current sensor, generating a force from a squib coupled to the housing, wherein the force biases a piston towards the busbar to create a break in the busbar.
Dependencies are inferred from the claim text.