Current converter with interchangeable head

Patent metadata

Field	Value
Publication number	US-9978495-B2
Application number	US-201314428964-A
Country	US
Kind code	B2
Filing date	Aug 21, 2013
Priority date	Sep 17, 2012
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

The subject matter herein pertains to a current transformer, comprising a secondary coil, connection contacts for establishing electrically conductive contact with the secondary coil from the outside, and a housing having a housing body and a housing head, wherein the secondary coil is accommodated in the housing body and/or is attached to the housing body, and the connection contacts of the secondary coil are provided on the housing head. According to one implementation, a connecting mechanism is provided, by means of which the housing head and the connection contacts can be mechanically or electrically conductively detachably connected to the housing body and to the secondary coil. A current transformer is therefore provided, which is cost-effective to produce and is flexible in terms of the use thereof.

First claim

The invention claimed is:

1. The current transformer, comprising:
a secondary coil;
connection contacts for establishing electrically conductive contact with the secondary coil from the outside; and
a housing having a flat housing body and a housing head, the flat housing body having, in the center thereof, an opening for the passage of a primary conductor, wherein the primary conductor, which is routed through the flat housing body, mechanically fixes the housing body in place such that the housing body cannot be released without the primary conductor being removed, and the housing head comprises protective electronics or functional electronics, wherein the protective electronics or functional electronics comprise electronics for monitoring impedance of a secondary circuit, such that a short-circuiter protects the current transformer against overload when a predetermined threshold is exceeded;
wherein the secondary coil is disposed within the flat housing body, wherein the connection contacts of the secondary coil are provided on the housing head, wherein a connecting mechanism is provided, via which the housing head and the connection contacts can be mechanically or electrically conductively detachably connected to the housing body and to the secondary coil;
wherein the current transformer is a straight-through or slip-over transformer; and
wherein the housing head is mounted on top of the housing body.

2. The current transformer according to claim 1
wherein the housing head is removably mounted on top of the housing body such that the housing head including the electrical connection contacts for the secondary coil can be removed and replaced without removing the housing body of the current transformer's housing from the primary conductor.

3. The current transformer according to claim 1 ,
wherein the connecting mechanism used for the mechanical or electrical conductive detachable connection is designed as a sliding mechanism and has a combination of groove and spring.

4. The current transformer according to claim 1 , wherein the connecting mechanism for the electrical connection comprises electrically conductive spring contacts, via which the connection contacts can be connected to the ends of the secondary coil.

5. The current converter according to claim 4 , wherein the secondary coil is short-circuited via the short circuiter when the housing head is removed from the housing body.

6. The current transformer according to claim 5 , wherein the connection mechanism is designed such that removing the housing head from the housing body results in an automatic short-circuiting of the short-circuiter.

7. The current transformer according to claim 4 , wherein the connection contacts are designed as push-in contacts or screw-type contacts.

8. The current converter according to claim 1 , wherein the secondary coil is short-circuited via the short circuiter when the housing head is removed from the housing body.

9. The current transformer according to claim 8 , wherein the connection mechanism is designed such that removing the housing head from the housing body results in an automatic short-circuiting of the short-circuiter.

10. The current transformer according to claim 1 , wherein the connection contacts are designed as push-in contacts or screw-type contacts.

11. The current transformer according to claim 10 , wherein the connection mechanism for the electrical connection comprises electrically conductive spring contacts, via which the connection contacts can be connected to the ends of the secondary coil.

12. The current converter according to claim 10 , wherein the secondary coil is short-circuited via the short circuiter when the housing head is removed from the housing body.

13. The current transformer according to claim 12 , wherein the connection mechanism is designed such that removing the housing head from the housing body results in an automatic short-circuiting of the short-circuiter.

14. The current transformer according to claim 10 , wherein a primary conductor routed through the housing body to the secondary coil can be operated with voltage differences between the primary conductor and the secondary coil of over 1000V due to geometric dimensioning of the spacings and/or dielectric dimensioning of the materials between the primary conductor and the secondary coil.

15. A set of housing heads for the current transformer according to claim 1 , wherein the connection mechanism is designed such that the housing body can be alternatively connected to the housing heads of the set.

16. The current transformer according to claim 15 , wherein the connection contacts are designed as push-in contacts or screw-type contacts.

17. A set of housing bodies for the current transformer according to claim 1 , wherein the connection mechanism is designed such that the housing head can be alternatively connected to the housing bodies of the set.

18. The current transformer according to claim 1 , wherein a primary conductor routed through the housing body to the secondary coil can be operated with voltage differences between the primary conductor and the secondary coil of over 1000V due to geometric dimensioning of the spacings and/or dielectric dimensioning of the materials between the primary conductor and the secondary coil.

19. The current transformer according to claim 1 , wherein the housing head comprises protective electronics.

20. The current transformer according to claim 1 , wherein the housing head comprises functional electronics.

Assignees

• Phoenix Contact Gmbh & Co

Inventors

• Thörner Carsten
• Senger Andreas
• Hobein Jürgen
• Becker Markus

Classifications

• H01F27/306

  Fastening or mounting coils or windings on core, casing or other support · CPC title

• H01F27/04 Primary

  Leading of conductors or axles through casings, e.g. for tap-changing arrangements · CPC title

• H01F38/28

  Current transformers · CPC title

• H01F5/04 Primary

  Arrangements of electric connections to coils, e.g. leads · CPC title

• H01F27/02

  Casings · CPC title