# US 2019/0318862 A1 · Electrical device having a plurality of cooling units > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318862 A1 - Document ID: US20190318862A1 - Status: Published application - Kind: A1 - Application number: 16/340,263 - Filed: 2017-09-15 - Published: 2019-10-17 - Earliest claimed: 2016-10-06 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: JOERG FINDEISEN - Web page: https://patentgrep.com/patent/US20190318862A1 ## CPC - H01F 27/10: Liquid cooling - H01F 27/2876: {Cooling (cooling transformers and inductances in general H01F27/08)} - H01F 27/02: Casings - H01F 27/14: Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling - H01F 27/28: Coils; Windings; Conductive connections - H01F 27/32: Insulating of coils, windings, or parts thereof - H01F 27/323: {Insulation between winding turns, between winding layers} - H01F 27/402: {Association of measuring or protective means} - H01F 27/125: {Cooling by synthetic insulating and incombustible liquid} - H01F 27/406: {Temperature sensor or protection} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract An electrical device connects to a high-voltage network and has a vessel, which is filled with an insulating fluid, an active part, which is arranged in the vessel and which has a magnetizable core and partial windings for producing a magnetic field in the core, and a cooling apparatus for cooling the insulating fluid. The electrical device is economical and at the same time can be operated at higher temperatures. This is achieved by use of at least one thermal barrier, which delimits cooling spaces, in each of which at least one partial winding is arranged. The cooling apparatus has at least two cooling units and each cooling unit being configured to cool an associated partial winding. ## Claims ### Claim at position 1 1-16. (canceled) ### Claim 17 An electrical device for connecting to a high-voltage network, the electrical device comprising: a vessel filled with an insulating fluid; an active part disposed in said vessel and having a magnetizable core and partial windings for generating a magnetic field in said magnetizable core; at least one thermal barrier delimiting cooling spaces and in each of said cooling spaces is disposed at least one of said partial windings; and a cooling device for cooling said insulating fluid, said cooling device having at least two cooling units, and each of said cooling units is configured to cool an associated one of said partial windings. ### Claim 18 (depends on 17) The electrical device according to claim 17, wherein: said cooling device has an outlet; and said thermal barrier forms at least one inlet opening which is connected to said outlet of said cooling device. ### Claim 19 (depends on 17) The electrical device according to claim 17, wherein said thermal barrier encloses a partial winding at least in certain portions. ### Claim 20 (depends on 17) The electrical device according to claim 17, wherein said thermal barrier is an electrical barrier at least in certain portions. ### Claim 21 (depends on 17) The electrical device according to claim 17, wherein said partial windings include a first partial winding being a low-voltage winding, and a second partial winding being a high-voltage winding, wherein said first and second partial windings are disposed concentrically to one another and to said magnetizable core which extends through said low-voltage winding being an inner low-voltage winding. ### Claim 22 (depends on 21) The electrical device according to claim 21, wherein said two cooling units include a first cooling unit configured cool said low-voltage winding and a second cooling unit configured to cool said high-voltage winding. ### Claim 23 (depends on 22) The electrical device according to claim 22, further comprising an expansion vessel, a cooling space in which said high-voltage winding is disposed is hydraulically coupled to a cooling space in which said low-voltage winding is disposed via said expansion vessel. ### Claim 24 (depends on 22) The electrical device according to claim 22, wherein at least one of said first and second cooling units is connected to a winding base and/or a winding top of one of said partial windings in such a way that flows of said insulating fluid that are in each case guided via said first and second cooling units during normal operation are separated from one another. ### Claim 25 (depends on 22) The electrical device according to claim 22, wherein each of said first and second cooling units has a cooling register. ### Claim 26 (depends on 25) The electrical device according to claim 25, wherein said cooling registers have different vertical spacings from a bottom plane defined by a bottom surface of said vessel. ### Claim 27 (depends on 17) The electrical device according to claim 17, wherein said partial windings have different partial winding insulations. ### Claim 28 (depends on 17) The electrical device according to claim 17, wherein said cooling device has a control unit with temperature sensors, said temperature sensors are configured to detect a temperature of a partial winding and/or to detect a temperature of said insulating fluid in said partial winding. ### Claim 29 (depends on 28) The electrical device according to claim 28, wherein at least one of said partial windings has temperature regions in which insulating materials of different thermal loadability are disposed. ### Claim 30 (depends on 29) The electrical device according to claim 29, wherein in each case one of said temperature sensors for measuring a hotspot temperature is disposed in at least two temperature regions and provides temperature measurement values on an outlet side which are compared with a threshold value predetermined in dependence on said insulating materials used in a respective one of said temperature regions, wherein a control signal is generated on a basis of a comparison. ### Claim 31 (depends on 29) The electrical device according to claim 29, wherein a plurality of fluidically connected said temperature regions in a cooling space are equipped with said temperature sensors for measuring a hotspot temperature of said partial winding in a respective temperature region, and signals of each of said temperature sensors are each assigned dedicated threshold values for triggering control functions which are tailored to a thermal class of said insulating materials used in said respective temperature regions of said partial winding. ### Claim 32 (depends on 22) The electrical device according to claim 22, further comprising a controller; further comprising sensors and dedicated sensors; and wherein said partial windings are fluidically and thermally separated partial windings and have said dedicated sensors for temperature monitoring of a winding temperature and/or said sensors for measuring a maximum insulating fluid temperature in thermally separated said cooling spaces of said partial windings, and said sensors are connected to said control unit which is provided with means for monitoring an observance of admissible temperatures of said partial windings and/or of said insulating fluid, which are different for each cooling space, and for independently controlling said cooling units respectively assigned to a cooling space.