Toroidal core current transformer comprising a phase compensation circuit

Abstract

Disclosed is a toroidal core current transformer comprising a primary conductor which penetrates the toroidal core and a secondary winding that is wound around the toroidal core. A measuring shunt (Rsh) or a load (Z b).

Description

technical field [0001] The invention relates to a toroidal core current transformer according to the preamble of the independent device claim and a method for determining a primary current by means of a toroidal core current transformer according to the preamble of the independent method claim . Background technique [0002] Toroidal core current transformers of this type can be used to convert high primary currents in the primary conductor into several times lower secondary currents in the secondary winding around the toroidal core by means of the toroidal core. So far, such toroidal core current transformers are used eg for revenue applications and for guarding purposes, where different types of current transformers (voltage output, current output) are used for revenue applications and for guarding purposes. [0003] Today, toroidal core current transformers with current output are often designed according to the IEC60044-1 standard and the IEC60044-6 standard, wherein ac...

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Problems solved by technology

[0007] However, complex ratio errors occur in both types of toroidal core current transformers (voltage output, current output) due to losses in the toroidal core (iron loss) and loss of the required magnetizing current of the toroidal core , where the complex ratio error depends on the magnitude error:

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