Do you know what is the low temperature drift of dc shunt

by:Positioning     2021-04-30
We all know dc shunt is down in a large electric work, the resistance of the surface temperature rise will cause the change of the resistance, which affect the precision. To minimize the influence of temperature on the precision, must want to use low temperature drift of dc shunt. Dc shunt is made up of resistance alloy material, electrode material and resistance alloy electrode material of part of the joint. Below is a typical temperature characteristic curve of dc shunt manganin alloy. Can see the resistance with the change of the temperature is parabola, and nonlinear changes. As shown in the figure below, the typical manganese copper alloy temperature drift of dc shunt is divided into three parts: the first paragraph: 0 & deg; C - 20° C, temperature drift is + 50 PPM / & deg; C; The second paragraph: 20 & deg; C - 30° C, temperature drift is 0 PPM / & deg; C; The third paragraph: 30 & deg; C - 100° C, for - temperature ppm / 28° C。 Latest precision dc shunt through balancing resistance alloy materials, electrode materials and the temperature of the joint part of the material characteristic, at 0 & deg; & C to 70 deg. C range temperature drift can reach & plusmn; 2. 5 ppm /° C ( As shown in the figure below) 。 This series of precision shunt current rating from 5 a to 10000 a, voltage divided into 50 mv, mv 60, 75 and 100 mv, mv: highest precision & plusmn; 0. 1%, at the same time, with a low thermal potential and excellent long-term stability. Dc shunt over current, resistance precision, small temperature drift, using pure copper environmental protection material, silver brazing welding, elegant appearance; Widely used in the dc ammeter ancillary equipment such as dc power. Zhejiang rectifier co. , LTD. & ndash; Domestic professional manufacturer of dc shunt, we practice & other; Don't accept nonconforming, manufacturing nonconforming, unqualified products & output throughout; Quality self-check management concept, to be perfect quality! Welcome to dial 0577 - 62627555, or click the counseling online customer service, we wholeheartedly at your service!
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