Current converter
A current converter contains a primary conductor, a housing through which the primary conductor is led, an inductive alternating-current sensor which has at least one secondary coil arranged in the housing, and a compensation current sensor having a compensation coil arranged in the housing for producing a compensation magnetic field, which compensates a primary magnetic field produced by the primary conductor. A magnetometer is further provided for detecting a sum of the primary magnetic field and the compensation magnetic field.
1. A current converter, comprising:
a primary conductor;
a housing and through said housing said primary conductor is led;
an inductive alternating current sensor having at least one secondary coil which is disposed in said housing; and
a compensation current sensor having a compensation coil disposed in said housing for producing a compensation magnetic field, the compensation magnetic field compensating a primary magnetic field produced by said primary conductor, said compensation current sensor further having a magnetometer for detecting a sum of the primary magnetic field and the compensation magnetic field, said compensation current sensor having a measuring circuit being disposed outside said housing and electrically connected to said compensation coil and said magnetometer.
2. The current converter according to claim 1 , wherein said inductive alternating current sensor has at least one measuring core and/or at least one protective core.
3. The current converter according to claim 1 , wherein said magnetometer is a fluxgate magnetometer.
4. The current converter according to claim 3 , wherein said fluxgate magnetometer has two compensation cores configured in an annular configuration about the primary conductor within said housing, and an excitation winding wound in an inverse direction about said two compensation cores.
5. The current converter according to claim 3 , wherein said fluxgate magnetometer has an additional core and an additional secondary winding, which are configured in an annular configuration about said primary conductor within said housing, said additional secondary winding and said compensation coil are wound about said additional core.
6. The current converter according to claim 1 , wherein said magnetometer contains a Hall effect sensor.
7. The current converter according to claim 1 , further comprising a winding housing disposed in said housing, and within said winding housing said at least one secondary coil and said compensation coil are disposed.
8. The current converter according to claim 7 , wherein said winding housing is electrically insulated vis-à-vis said housing.
9. The current converter according to claim 1 , wherein said housing is filled with an insulating gas or an insulating fluid, or with an insulating compound.
10. The current converter according to claim 1 , wherein said inductive alternating current sensor contains a further measuring circuit, which is disposed outside said housing and is electrically connected to each said secondary coil.
11. The current converter according to claim 1 , wherein said compensation current sensor is deactivable.
12. The current converter according to claim 1 , further comprising a post insulator, and upon said post insulator said housing is disposed.
13. A current converter, comprising:
a primary conductor;
a housing and through said housing said primary conductor is led;
an inductive alternating current sensor having at least one secondary coil which is disposed in said housing; and
a compensation current sensor having a compensation coil disposed in said housing for producing a compensation magnetic field, the compensation magnetic field compensating a primary magnetic field produced by said primary conductor, said compensation current sensor further having a magnetometer with a Hall effect sensor for detecting a sum of the primary magnetic field and the compensation magnetic field, said compensation current sensor further having a magnet core configured in an annular configuration about said primary conductor, within said housing, and about said magnet core said compensation coil being wound, and said magnet core having an air gap formed therein and in said air gap said Hall effect sensor is disposed.