Shunt Mode A

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, so three-phase meters is more and more adopting shunt solution with regard to lower cost. Electron Beam Welding shunt (E-B Shunt) is high technology product, and has strict requirement for manganin and copper 99.9% materials, so the quality and appearance is excellent after vacuum welding.

    1.  High accuracy:  Resistance value is very stable, error 2-5%. It's easy to work out class 1.0 meter with E-B shunt.

      2.  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.

      3.  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.

      4.  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.

      5.  Low temperature coinfidence:  temperature coinfidence is smaller than 30ppm from -40℃--+140℃, there is very minor resistance value change at different temperature conditions.

      6.  Resistant to oxidation:  Special material is coated on the copper to protect from the oxidation.

      7.   Long term stability:  The good performance is stable within 20 years.

      8.  Resistant to lightning strike:  It can pass test of 3000A 10ms lightning strike test.

      9.  Smart size and low weight:  Even thickness makes packing easily. Transport cost is lower for less weight.

      10.Lower cost:  It is related with the structure. Reasonable design is important for low cost.

Specification