DEVICE FOR MEASURING CURRENT OF BUSES PACKET Russian patent published in 2005 - IPC

FIELD: measuring equipment.

SUBSTANCE: device has measuring transformer, including magnetic duct of two U-shaped cores, compensation winding, Hall indicator, positioned in magnetic duct space, adding amplifier. Device is also provided with indicator of variable current component in form of current transformer with one secondary winding, wound on ferromagnetic core. Output of indicator of variable current component through resistor is connected to first input of compensation amplifier. Other resistor is enabled between first and second inputs of compensation amplifier. Output of compensation amplifier is connected to input of current-voltage transformer. Output of current-voltage transformer is connected to one of inputs of adding amplifier. In circuit of secondary winding of current transformer from output of compensating amplifier additionally alternating current is sent, which compensates current of magnetization current transformer and decreases error of measurement of current of buses packet.

EFFECT: higher resistance to interference, higher efficiency.

3 dwg