US 11,835,392 B2
Apparatus, system and method for temperature measurement for dry-type transformer
YiBo Zhang, Beijing (CN); Delun Meng, Beijing (CN); Jiansheng Chen, Beijing (CN); and Chun Li, Beijing (CN)
Assigned to HITACHI ENERGY LTD, Zürich (CH)
Appl. No. 16/963,210
Filed by HITACHI ENERGY LTD, Zürich (CH)
PCT Filed Jan. 19, 2018, PCT No. PCT/CN2018/073447
§ 371(c)(1), (2) Date Jul. 18, 2020,
PCT Pub. No. WO2019/140643, PCT Pub. Date Jul. 25, 2019.
Prior Publication US 2021/0131876 A1, May 6, 2021
Int. Cl. G01K 1/024 (2021.01); G01K 1/14 (2021.01); G01K 3/00 (2006.01); G05B 15/02 (2006.01); H01F 27/08 (2006.01); H01F 27/40 (2006.01); H04Q 9/00 (2006.01)
CPC G01K 1/024 (2013.01) [G01K 1/14 (2013.01); G01K 3/005 (2013.01); G05B 15/02 (2013.01); H01F 27/085 (2013.01); H01F 27/402 (2013.01); H04Q 9/00 (2013.01); H01F 2027/406 (2013.01); H04Q 2209/47 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A measuring apparatus comprising: a temperature sensor configured to measure a temperature of a dry-type transformer, the temperature sensor being arranged on or approximate to a conductor of the dry-type transformer and being covered by an insulating layer of the conductor; and a passive wireless communication module configured to transmit the measured temperature to a reader,
wherein the insulating layer is formed by wrapping an insulating material on the conductor and the temperature sensor,
wherein the conductor is a part of the followings: a high voltage winding of the dry-type transformer, a low voltage winding of the dry-type transformer, a core of the dry-type transformer, and a tap terminal of the dry-type transformer, and wherein insulating material includes an epoxy resin,
wherein the passive wireless communication module is connected to the temperature sensor via a wire, and one end of the wire protrudes from the insulating layer,
wherein the passive wireless communication module is arranged on or inside a dome area of the HV winding, and preferably, near a tap changer or a wire connection terminal on the dome area.