Partial discharge sensor

• US 10,310,000 B2
• Filed: 03/07/2014
• Issued: 06/04/2019
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Yanagi, Takashi, Fukasawa, Toru, Ito, Takashi
• Primary Examiner(s): Assouad, Patrick
• Assistant Examiner(s): Zhang, Haidong
• Application Number:
  US15/116,596
• Publication Number:
  US 20160349303A1
• Time in Patent Office: 1,915 Days
• CPC Class Codes: G01R 31/1272 of cable, line or wire insulation, e.g. using partial discharge measurements locating faults in cables G01R31/083
• CPC Class Codes: G01R 31/14 Circuits therefor , e.g. for generating test voltages, sensing circuits G01R31/1209 - G01R31/1227 take precedence; for testing switches G01R31/327
• CPC Class Codes: H02B 13/065 Means for detecting or reacting to mechanical or electrical defects

Abstract

There is provided a partial discharge sensor including a first flange formed at an end of a first conductor tube, a second flange formed at an end of a second conductor tube, a first insulating spacer sandwiched between the first flange and the second flange, a plurality of holes passing through the first flange, the first insulating spacer, and the second flange, at least two first conductors each passing through one of the plurality of holes to be disposed with electrically connected to the first flange and the second flange, a second conductor passing through one of the plurality of holes to be disposed with electrically connected to the second flange, and a second insulating spacer that insulates the second conductor and the first flange from each other.

Claims

1. A partial discharge sensor comprising:

a first flange formed at an end of a first conductor tube;

a second flange formed at an end of a second conductor tube;

a first insulating spacer sandwiched between the first flange and the second flange;

a plurality of holes passing through the first flange, the first insulating spacer, and the second flange;

at least two first conductors each passing through respectively first and second holes of the plurality of holes and electrically connected to both of the first flange and the second flange;

a second conductor passing through a third hole of the plurality of holes, electrically connected to the second flange, and insulated from the first flange; and

a second insulating spacer that insulates the second conductor and the first flange from each other.

2. The partial discharge sensor according to claim 1, further comprising a slot antenna in which the first flange, the second flange, and the first conductors are formed as a line.

3. The partial discharge sensor according to claim 1, further comprising at least one coupling member disposed to pass through a fourth hole of the plurality of holes, wherein

the coupling member is disposed between the first conductor and the second conductor on a circumference on which the first conductors and the second conductor are disposed.

4. The partial discharge sensor according to claim 3, wherein

the coupling member is a third conductor, and

the partial discharge sensor further comprises third insulating spacers that insulate the third conductor and the first flange from each other, and the third conductor and the second flange from each other, respectively.

5. The partial discharge sensor according to claim 1, wherein

one of an inner conductor and an outer conductor of a feeder is electrically connected to the first flange via one of the first conductors, and

the other of the inner conductor and the outer conductor of the feeder is electrically connected to the second flange via the second conductor.

6. The partial discharge sensor according to claim 5, wherein

the second conductor is a bolt that couples the first flange and the second flange,

the inner conductor and the outer conductor of the feeder each have a conductor terminal at an end thereof, and

the two conductor terminals are fixed to the first flange via the bolt with the second insulating spacer sandwiched between the two conductor terminals, by using a head of the bolt or a nut that tightens the bolt.

7. The partial discharge sensor according to claim 5, wherein

the first conductor and the second conductor are first and second bolts that couple the first flange and the second flange, respectively,

the inner conductor and the outer conductor of the feeder each have a conductor terminal at an end thereof, and

one of the two conductor terminals is fixed to the first flange via the first bolt using a head of the first bolt or a nut that tightens the first bolt, and the other of the terminals is fixed to the first flange via the second bolt using a head of the second bolt or a nut that tightens the second bolt.

8. A partial discharge sensor comprising:

a first flange formed at an end of a first conductor tube;

a second flange formed at an end of a second conductor tube;

a first insulating spacer sandwiched between the first flange and the second flange;

a first hole passing through the first flange, the first insulating spacer, and the second flange;

a first conductor passing through the first hole to be disposed with electrically connected to the second flange;

a second insulating spacer that insulates the first conductor and the first flange from each other; and

a parallel plate antenna formed of the first flange and the second flange.

9. A partial discharge sensor comprising:

a first flange formed at an end of a first conductor tube;

a second flange formed at an end of a second conductor tube;

a first insulating spacer sandwiched between the first flange and the second flange;

a first hole passing through the first flange, the first insulating spacer, and the second flange;

a first conductor passing through the first hole and disposed to be electrically connected to the second flange; and

a second insulating spacer that insulates the first conductor and the first flange from each other, wherein

one of an inner conductor and an outer conductor of a feeder is electrically connected to the first flange, and

the other of the inner conductor and the outer conductor of the feeder is electrically connected to the second flange via the first conductor.

10. The partial discharge sensor according to claim 9, wherein

the first conductor is a bolt that couples the first flange and the second flange,

the inner conductor and the outer conductor of the feeder each have a conductor terminal at an end thereof, and

the two conductor terminals are fixed to the first flange via the bolt using a head of the bolt or a nut that tightens the bolt with the second insulating spacer sandwiched between the two conductor terminals.

11. The partial discharge sensor according to claim 9, further comprising:

a second hole passing through the first flange, the first insulating spacer, and the second flange;

a second conductor disposed to pass through the second hole; and

third insulating spacers that insulate the second conductor and the first flange from each other, and the second conductor and the second flange from each other, respectively, wherein

the first conductor and the second conductor are first and second bolts that couple the first flange and the second flange,

the inner conductor and the outer conductor of the feeder each have a conductor terminal at an end thereof, and

one of the two conductor terminals is fixed to the first flange via the first bolt using a head of the first bolt or a nut that tightens the first bolt, and the other of the two conductor terminals is fixed to the first flange via the second bolt using a head of the second bolt or a nut that tightens the second bolt.