# US 12,015,262 B2 · Integrator for protective relay > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,262 B2 - Document ID: US12015262B2 - Status: Granted - Kind: B2 - Application number: 17/836,982 - Filed: 2022-06-09 - Published: 2023-12-14 - Granted: 2024-06-18 - Earliest claimed: 2022-06-09 - Assignees: Accuenergy (Canada) Inc. - Applicants: Accuenergy (Canada) Inc. - Inventors: Ketao Li; Yufan Wang; Liang Wang - Web page: https://patentgrep.com/patent/US12015262B2 ## CPC - H02H 3/085: {making use of a thermal sensor, e.g. thermistor, heated by the excess current (also responsive to the temperature of the protected device H02H5/041, thermal images H02H6/00)} - H02H 3/10: additionally responsive to some other abnormal electrical conditions - H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing} - 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) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An integrator for monitoring at least one parameter of an electrical signal in an electrical conductor in protective relay application. The integrator includes an integrator circuit having an input for receiving a signal from a current sensor coupled to the electrical conductor. A switch circuit has an input coupled to the output of the integrator circuit, wherein the switch circuit is controlled by the output of a temperature detection circuit. A power stage circuit has an input coupled to the output of the switch circuit, wherein the temperature detection circuit is coupled to a heating element of the power stage circuit through a temperature sensor, and the heating element is attached to a channel-shaped heatsink for heat dissipation. ## Claims ### Claim 1 An integrator for monitoring at least one parameter of an electrical signal in an electrical conductor, comprising: an integrator circuit having an input for receiving a signal from a current sensor coupled to the electrical conductor; a switch circuit having an input coupled to the output of the integrator circuit, wherein the switch circuit is controlled by the output of a temperature detection circuit; a power stage circuit having an input coupled to the output of the switch circuit, wherein the temperature detection circuit is coupled to a heating element of the power stage circuit through a temperature sensor, and the heating element is attached to a channel-shaped heatsink for heat dissipation. ### Claim 2 (depends on 1) The integrator of claim 1, wherein the temperature detection circuit triggers the switch circuit to isolate the power stage circuit from the integrator circuit when the power stage circuit works above a first threshold temperature. ### Claim 3 (depends on 2) The integrator of claim 2, wherein the temperature detection circuit triggers the switch circuit to conduct electricity from the integrator circuit to the power stage circuit when the power stage circuit works below a second threshold temperature. ### Claim 4 (depends on 3) The integrator of claim 3, wherein gap between the first threshold temperature and the second threshold temperature is 25° C. ### Claim 5 (depends on 3) The integrator of claim 3, wherein the first threshold temperature is 125° C. and the second threshold temperature is 100° ° C. ### Claim 6 (depends on 1) The integrator of claim 1, wherein the heatsink has substantially equal width and length. ### Claim 7 (depends on 1) The integrator of claim 1, wherein the current sensor comprises a Rogowski coil. ### Claim 8 A protective relay system, comprising: a current sensor located proximate a current conductor for detecting current in the conductor; and an integrator coupled to the current sensor, comprising: an integrator circuit having an input for receiving a signal from a current sensor coupled to the electrical conductor; a switch circuit having an input coupled to the output of the integrator circuit, wherein the switch circuit is controlled by the output of a temperature detection circuit; and a power stage circuit having an input coupled to the output of the switch circuit, wherein the temperature detection circuit is coupled to a heating element of the power stage circuit through a temperature sensor, and the heating element is attached to a heatsink with substantially equal width and length. ### Claim 9 (depends on 8) The protective relay system of claim 8, wherein the current sensor comprises a Rogowski coil. ### Claim 10 (depends on 8) The protective relay system of claim 8, wherein the temperature detection circuit triggers the switch circuit to isolate the power stage circuit from the integrator circuit when the power stage circuit works above a third threshold temperature. ### Claim 11 (depends on 10) The protective relay system of claim 10, wherein the temperature detection circuit triggers the switch circuit to conduct electricity from the integrator circuit to the power stage circuit when the power stage circuit works below a fourth threshold temperature. ### Claim 12 (depends on 11) The protective relay system of claim 11, wherein the gap between the third threshold temperature and the fourth threshold temperature is 25° ° C. ### Claim 13 (depends on 11) The protective relay system of claim 11, wherein the third threshold temperature is 125° C. and the fourth threshold temperature is 100° C. ### Claim 14 (depends on 8) The protective relay system of claim 8, the heatsink is made from copper. ### Claim 15 (depends on 8) The protective relay system of claim 8, the heatsink is channel-shaped.