{"id":1391,"date":"2017-11-30T00:17:50","date_gmt":"2017-11-30T00:17:50","guid":{"rendered":"https:\/\/riedon.com\/blog\/?p=1391"},"modified":"2017-12-01T17:45:56","modified_gmt":"2017-12-01T17:45:56","slug":"shunts-measuring-current-taken-higher-leve","status":"publish","type":"post","link":"https:\/\/riedon.com\/blog\/shunts-measuring-current-taken-higher-leve\/","title":{"rendered":"Shunts ; Measuring current taken to a higher level"},"content":{"rendered":"<p><a href=\"https:\/\/riedon.com\/blog\/wp-content\/uploads\/2014\/09\/DC-ammeter-shunt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-910 size-medium\" src=\"https:\/\/riedon.com\/blog\/wp-content\/uploads\/2014\/09\/DC-ammeter-shunt-300x163.jpg\" alt=\"DC Ammeter shunt\" width=\"300\" height=\"163\" srcset=\"https:\/\/riedon.com\/blog\/wp-content\/uploads\/2014\/09\/DC-ammeter-shunt-300x163.jpg 300w, https:\/\/riedon.com\/blog\/wp-content\/uploads\/2014\/09\/DC-ammeter-shunt-1024x558.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Precision shunts are very precise resistors inserted into a circuit in order to measure the current flowing through that circuit.\u00a0 The shunt does this by providing a very small voltage drop across its resistance proportional to the current flowing through the shunt.\u00a0 This can be clarified using Ohm\u2019s Law, which states that the voltage will be equal to the current multiplied by the resistance (E=IR).\u00a0 Shunts are typically rated according to a full-scale current rating and the corresponding voltage output.<\/p>\n<h1>Example:<\/h1>\n<h6>The Riedon RSB-500-50 will handle a full-scale current of 500 amps with a corresponding 50mV output, this equates to a resistance value of 0.0001 ohm (R=E\/I).\u00a0 Various full-scale currents are available in industry standard 100mV and 50mV outputs.\u00a0 Other outputs may be available upon request.<\/h6>\n<p>Full-scale current does not mean that the shunt will handle that amount of current continuously.\u00a0 As a matter of fact, it is common to de-rate the shunt by \u2154 to obtain a safe continuous current rating at ambient temperatures up to 40\u00b0 C.\u00a0 The true limiting factor here is the thermal factor.\u00a0 It is essential that the resistive element of the shunt not exceed 145\u00b0 C.\u00a0 At temperatures above this value, the resistive element will incur a permanent resistance shift and will no longer be accurate.\u00a0 For this reason, we recommend that you keep the resistance element at or below 125\u00b0 C to provide even more margin of safety.<\/p>\n<h2>Shunts Resistors<\/h2>\n<p>In practice, the <a href=\"https:\/\/riedon.com\/resistors\/view\/current-sensing-shunt-rcs\/\">shunt <\/a>is usually placed near the power source in order to minimize losses incurred by the connecting wire or bus-bar and to help ensure that the total current of the circuit is being measured.\u00a0 In order to minimize voltage potentials, it is best to place the shunt on the ground leg of the source.\u00a0 Riedon shunts are provided with \u201c<a href=\"https:\/\/en.wikipedia.org\/wiki\/Shunt_(electrical)\">Kelvin connections\u201d<\/a> meaning that there are connections for the high current carrying part of the device and separate terminations for the voltage sensing.\u00a0 This is done to eliminate the voltage drop that would be present on the high-current conductors in order to help ensure the greatest accuracy.<\/p>\n<p>For more information visit <a href=\"http:\/\/shunts.com\">Shunts<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Precision shunts are very precise resistors inserted into a circuit in order to measure the current flowing through that circuit.\u00a0 The shunt does this by providing a very small voltage drop across its resistance proportional to the current flowing through the shunt.\u00a0 This can be clarified using Ohm\u2019s Law, which states that the voltage will [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[3],"tags":[395,400,399],"class_list":["post-1391","post","type-post","status-publish","format-standard","hentry","category-resistors","tag-resistors","tag-shunt","tag-shunt-measurement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Shunts ; 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