Precision shunts are generally produced using copper-manganese alloy materials. Many precision shunts developed by resistor manufacturers on the market generally use copper-manganese alloy or constantan alloy. These two types of precision shunts are widely used and applied. The shunt can guarantee 0.1% sampling accuracy within the range of 10%-100% of rated current. The special structural design effectively reduces the thermoelectric potential error and connection error, and 100% calibration is achieved before leaving the factory.

At present, many resistor manufacturers also introduce economical manganese-copper alloy shunts. This shunt has the characteristics of low thermal potential and low inductance. The maximum current is 600A, the minimum resistance is 50μΩ, and the maximum rated power is 36W. It adopts four-legged Kelvin connection and electron beam welding process. The voltage signal output point is rich in structure. It is suitable for battery management systems, power electronics current sensing, frequency converters, UPS, motor control and electronic load equipment.

The precision shunt needs to work under a large current, and the surface temperature rise of the resistance will lead to the change of the resistance value, thus affecting the detection accuracy. In order to minimize the influence of temperature on detection accuracy, it is necessary to use a low temperature floating shunt. The common precision shunt consists of three parts of materials, namely, resistance alloy material, electrode material and resistance alloy and electrode joint part. High-end precision shunt is widely used in battery management system and intelligent meter industry which require very high precision in current detection.