Current measuring device
The present disclosure relates to a current measuring device comprising: a plurality of unit modules which are provided with mutually different grounds and are connected in series; a power unit which supplies high-voltage DC or AC power to the plurality of unit modules via a line; and a current sensor which measures a current flowing through the line.
1 . A current measuring device, comprising:
a plurality of unit modules which are provided with mutually different grounds and are connected in series;
a power unit which supplies high-voltage DC or AC power to the plurality of unit modules via a line; and
a current sensor which measures a current flowing through the line,
wherein the current sensor is provided with a ground from an adjacent unit module that is closest to the current sensor among the plurality of unit modules such that a voltage difference between a measurement point and a ground terminal of the current sensor is equivalent to a voltage drop across the adjacent unit module.
2 . The current measuring device of claim 1 , wherein the current sensor is a low-voltage current sensor.
3 . The current measuring device of claim 1 , wherein the current sensor measures a current value by selectively using one or two current sensors according to the current flowing in the line.
4 . The current measuring device of claim 1 , further comprising:
a control unit for controlling the current sensor by determining an operating state of the current sensor based on a current value measured by the current sensor;
a display unit for displaying the current value measured by the current sensor;
an external device for allowing a manager to monitor the operating state determined by the control unit; and
communication unit for connecting the control unit and the external device.