CURRENT MEASUREMENT DEVICE Russian patent published in 2011 - IPC G01R19/00 

FIELD: electricity.

SUBSTANCE: device includes power unit and low-frequency filter that is parallel connected to its outputs. Output of low-frequency filter is measuring output of the device. Power unit is made in the form of key transformer converter of constant voltage. Power unit includes at least one electronic switch one output of which is connected to the first output of primary winding of transformer. The second output of the above winding and the second output of electronic switch are connected respectively to negative and positive contacts of power supply. At that, the first and the second outputs of primary winding are the first and the second output of power unit for connection of low-frequency filter. The latter contains chain of in-series connected resistor and capacitor. At that, the second outputs of resistor and capacitor are the first and the second input of the above filter the output of which is formed with the first and the second outputs of capacitor.

EFFECT: creation of all-purpose economic current measurement device without additional power losses in measurement part with enlargement of application area on the circuits containing the transformer.

6 cl, 2 dwg