Shunt is one of the main current sensor used in kWh meter, especially in single phase kWh meter. It's much more economical than current transformer. Electron Beam Welding shunt (E-B Shunt) is a new technology product. This technology has strict requirement for manganin and copper 99.9% materials, so it has excellent quality.

Advantages
- High accuracy: Resistance value is very stable, error 2-5%. It's easy to work out class 1.0 meter with E-B shunt
- Good linerarity: The linerarity is very good so the resistance value changes in a narrow range. Production cost can be reduced because the meter calibration is easier and quicker.
- Long-term reliability: The manganin and copper are melted to be in one body by high temperature electron beam, so the copper and manganin will never depart in the operation of the meter.
- Small self-heating: No solder between copper and manganin, so there isn't additional heating on the shunt. Even thickness make the contact resistance smallest. Enough section area and surface area will dissipate the slef-heating quickly.
- Low temperature coinfidence: Temperature coinfidence is smaller than 30ppm from -40 ~ +140 centidegree, there is very minor resistance value change at different temperature conditions.
- Resistant to oxidation: Special material is coated on the copper to protect from the oxidation
- Long term stability: The good performance is stable within 20 years
- Resistant to lightning strike: It can pass test of 3000A 10ms lightning strike test.
- Smart size and low weight: Even thickness makes packing easily. Transport cost is lower for less weight.
- Lower cost: It is related with the structure. Reasonable design is important for low cost.