Description:
Due to the physical operating principle of current transformers, the measuring core volume required to transmit a certain power increases sharply with decreasing primary rated currents. As there are limits to the geometric dimensions of the current transformer that can be increased by the user, so-called wound current transformers are used for low primary rated currents.
The group of wound current transformers also includes so-called intermediate current transformers. Intermediate current transformers are manufactured for primary rated currents of up to approx. 10 A and enable the proportional conversion of the input current to lower or higher secondary rated currents. If their measuring systems are properly designed, they enable the transmission of analogue measured values over long distances, as well as reliable protection of downstream measuring devices in the event of overcurrent conditions in the primary network.
The increase in possible signal transmission distances is achieved by a reduction in line losses associated with falling secondary currents.
Our production mainly comprises low-voltage current transformers up to a maximum operating voltage of 0.72 kV in accordance with IEC 61869/1+2 (formerly IEC 60044-1). The current status applies to the standards used.
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