# US 2023/0054080 A1 · Circuit protection device and system with power supply conversion and control for dc loads > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054080 A1 - Document ID: US20230054080A1 - Status: Published application - Kind: A1 - Application number: 17/797,346 - Filed: 2021-01-27 - Published: 2023-02-23 - Earliest claimed: 2020-01-31 - Assignees: Eaton Intelligent Power Limited - Applicants: Eaton Intelligent Power Limited - Inventors: Toni OTT; Joseph MANAHAN - Web page: https://patentgrep.com/patent/US20230054080A1 ## CPC - H02H 3/05: with means for increasing reliability, e.g. redundancy arrangements {(for logic circuits H03K19/003)} - H05B 45/56: involving measures to prevent abnormal temperature of the LEDs - H02H 5/04: responsive to abnormal temperature {(specially adapted for electric machines H02H7/0852)} - H02H 9/008: {Intrinsically safe circuits} - H05B 45/3725: Switched mode power supply [SMPS] - Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED] - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Hazardous location compliant solid state circuit protection device (100) includes at least one solid state switching element (142a-d) and a load controller (170). The solid state switching element operates in an arc-free manner to limit or preclude electrical current flow from the line-side terminal (132) to the load-side terminal (136). The load controller includes power converter circuitry (172) operative to convert an alternating current (AC) power supply input to the line-side terminal to a direct current (DC) power output at the load side terminal. One or more DC devices may be coupled to the DC power output at the load side terminal. ## Claims ### Claim 1 An electrical power conversion and control system comprising: a circuit protection device comprising: a housing; a line-side terminal and a load-side terminal coupled to the housing; at least one solid state switching element operable in an arc-free manner to limit or preclude electrical current flow from the line-side terminal to the load-side terminal; and a load controller in the housing and including power converter circuitry operative to convert an alternating current (AC) power supply input to the line-side terminal to a direct current (DC) power output at the load side terminal. ### Claim 2 (depends on 1) The system of claim 1, wherein the load controller is configured to vary the voltage of the DC power output according to one of a plurality of user-selected settings. ### Claim 3 (depends on 2) The system of claim 2, wherein the housing of the circuit protection device is ignition-protected for compliant use in a hazardous location. ### Claim 4 (depends on 3) The system of claim 3, wherein the circuit protection device further includes at least one temperature sensor, and wherein the least one solid state switching element is operable in response to input from the at least one temperature sensor to limit or preclude electrical current flow from the line-side terminal to the load-side terminal and maintain an operating temperature of the circuit protection device below a rated temperature limit, thereby rendering the circuit protection device compliant for use in the hazardous location without requiring a separately provided explosion-proof enclosure. ### Claim 5 (depends on 1) The system of claim 1, wherein the load controller is configured to adjust an output pulsed DC power to the DC load device. ### Claim 6 (depends on 1) The system of claim 1, in combination with the at least one DC load device. ### Claim 7 (depends on 6) The system of claim 6, wherein the at least one DC load device does not include an AC/DC power converter. ### Claim 8 (depends on 7) The system of claim 7, wherein the at least one DC load device includes a DC/DC power converter. ### Claim 9 (depends on 8) The system of claim 8, wherein the at least one DC load device is a light emitting diode (LED) luminaire. ### Claim 10 (depends on 9) The system of claim 9, wherein the light emitting diode (LED) luminaire is compliant for use in a hazardous location. ### Claim 11 (depends on 6) The system of claim 6, wherein the at least one DC load comprises a plurality of DC loads connected in series to one another and to the load-side terminal of the circuit protection device. ### Claim 12 (depends on 11) The system of claim 11, wherein the plurality of DC loads are each light emitting diode (LED) luminaires. ### Claim 13 (depends on 12) The system of claim 12, wherein at least some of the light emitting diode (LED) luminaires include a DC/DC power converter. ### Claim 14 (depends on 1) The system of claim 1, further comprising at least one mechanical switch contact connected between the line-side terminal and the load-side terminal in the switch device, and the housing of the switch device including a sealed internal enclosure containing the at least one mechanical switch contact, thereby precluding the switch contact from being an ignition source in a hazardous location. ### Claim 15 (depends on 1) The system of claim 1, wherein the at least one solid state switching element is encapsulated. ### Claim 16 (depends on 1) The system of claim 1, wherein the circuit protection device is configured as a solid state circuit breaker device. ### Claim 17 (depends on 1) The system of claim 1, wherein the circuit protection device is configured as a hybrid circuit breaker device. ### Claim 18 (depends on 1) The system of claim 1, wherein the housing of the circuit protection device is electrically grounded. ### Claim 19 (depends on 1) The system of claim 1, wherein the housing of the circuit protection device exhibits anti-static properties. ### Claim 20 (depends on 1) The system of claim 1, wherein the housing of the circuit protection device is chemically resistant in a hazardous location.