Invention Grant
US07521916B2 Apparatus for the detection of a current and method for operating such an apparatus 有权
用于检测电流的装置和操作这种装置的方法

Apparatus for the detection of a current and method for operating such an apparatus
Abstract:
An apparatus for the detection of a current in a protection and metering current range comprises one current sensor, which generates a voltage signal, and a voltage-limited electronic element. For metering voltage signals exceeding the upper metering voltage limit of the electronic element or for protection voltage signals exceeding the upper protection voltage limit of the electronic element an attenuation element with an attenuation factor being larger than unity is electrically connected to the current sensor. The attenuation factor is chosen in such a way that the metering voltage signal divided by the attenuation factor is smaller than or equal to the upper electronic element metering voltage limit or the protection voltage signal divided by the attenuation factor is smaller than or equal to the upper electronic element protection voltage limit.
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