5/23/2014 10:11 AM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Hello @nkur DC Shunts are always specified as per the Rated Current and Voltage Drop at Rated Rurrent. e.g. a 2000Amp 75mV Shunt means there will be 75mV drop across the shunt at 2000Amp. Ohms can be calculated easily using the Ohms Law R = V/I = 0.075 / 2000 Ohms The Shunt needs to be designed for the rated current that has to pass through it. Hope this helps Cheers Navnag |
There is no such thing as the last bug in a program |
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5/25/2014 6:49 PM | |
Posts: 202 Rating: (16) |
Hi there thanks for the reply but please help me out as right in one of my project i need to order a shut havving voltage of 550V DC and current of 50A please provide the deatils how order n what to mention during its selection process
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5/25/2014 7:55 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Dear @nkur System voltage is of no consequence in DC Current Measurement with a Shunt. If your rated current is 50 Amps, you just need a Shunt of 50Amp, 75mV ( i.e. 75mV Drop at 50 Amp DC Current ) You can display it with a DC Voltmeter with Scale 0-50A for 0-75mV Input. You cannot correct the 75mV from shunt to a PLC Analog Input. For PLC Connection, you need a signal isolator ( With Optical Isolation ) which converts 0-75mV to 0-10V or 4-20mA for PLC AI Hope this helps Cheers Navnag |
There is no such thing as the last bug in a program |
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5/26/2014 6:43 AM | |
Posts: 235 Rating: (52) |
Dear @nkur Please note that the values of DC shunt is allwayes in OHM but due to the its nooutput in miolivolt the values available in market as per its output and that why is rating in mv. For more details and clarification pls find the attached shhet for the same. HOpe this will heplful for you Kind Regards AttachmentDC SHUNT.pdf (1033 Downloads) |
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5/28/2014 3:29 PM |
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Posts: 63 Rating: (4) |
Yes PAC3200 devices are used for measuring AC currents only. Thanks Ste & others |
Last edited by: MHasan at: 5/29/2014 12:33 PM |
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5/28/2014 4:55 PM | |
Joined: 1/21/2013 Last visit: 10/18/2024 Posts: 4620 Rating: (708) |
Hello MHasan, This is PAC 3200 try to use with DC current, if you can: 7KM PAC3200 Measuring Devices - Power Distribution - Siemens |
10/19/2014 5:18 AM | |
Posts: 2 Rating: (0) |
Hello to all as said before by members, you can: 1.- Sense current with a shunt like 2000A/60mV example: Victron 2000A/50mV: http://www.power-solutions.co.za/battery-monitors/victron-bmv-shunt-2000a-50mv or http://www.knick.de/media/Maconic_Shunts_EN_120613.pdf (best option) 2.- Convert mV signal form shunt to 4-20mA signal to PLC input using a Signal Conveter (isolated) example: http://www.flex-core.com/pdf-files/VT7.pdf You can use a 0-10V transductor too. Regards |
Last edited by: Lovando at: 10/19/2014 5:19 AM |
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6/24/2015 6:30 PM | |
Posts: 2 Rating: (0) |
Hello, If an optically isolated Analog input card was utilized, would a conditioner/isolator still be required? Thanks. |
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