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About CG:CG ammeter shunt is made of high quality brass and Manganin, is Sanded to make more shiny , sealing treatment to be used for a long time. Parameter:500A 50mV DC shunt;Voltage drop:50mV;Accuracy:+/- 0.25%;Operating Temperature:-40℃ to +60℃;Material:Copper+Manganin;relative humidity:less than or equal to 95% (35℃). Temperature Rise:20ppm,When the change of temperature tends to be stable,if rated current is below 50%, the temperature will be not higher than 80℃,if rated current is above 50%, the temperature will be not higher than 120℃. Over-load ability:rated current 120%, 2 hours.It is not recommended that the practical used current over the 80% of rated current for a long time. Package Content:1*500A/50mV dc shunt., Weight: 0.601200588474 Pounds, Manufacturer: CGELE Official Store