Shunt resistance type current sensor

A shunt resistance type current sensor comprising:

• a bus bar that is a path of an electric current to be measured;
• a circuit board that is installed over the bus bar;
• a pair of connecting members that electrically connect the circuit board with the bus bar;
• a voltage detection unit that is provided on the circuit board and detects a voltage value applied to the circuit board through the pair of connecting members so as to calculate a level of the electric current flowing through the bus bar;
• and
• a temperature sensor that is provided on the circuit board to face the bus bar and detects a temperature of the bus bar to allow the voltage detection unit to perform a correction regarding the calculation of the level of the electric current;
• wherein the voltage detection unit includes a temperature detection portion for detecting the temperature of the bus bar, and determines an abnormality of the temperature sensor based on the temperature detected by the temperature detection portion and the temperature detected by the temperature sensor.