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Do you want protect the motor against internal faul or only measuremet? If you want the diferential protection, the best is the use of 6 CTs Fernandoelec

with the same configuration you can purchase a VFD from Invertek(UK) they have single phase VFD with the features that you need Fernandoelec

An additional comment to the Skogsgurra´s info, you must be care with the power spikes, cause in some cases with the load attached to the motor shaft an over voltage can be present in the AC drive's DC Bus and it can explode, please ensure that the AC drive has a DC Braking resistor unit this...

Recheck if your VFD has the PID function or if you can control it by a torque adjusment fucntion inside. Other option is that you can use the the analog output signal configured as a Power or energy signals and with a small PID controller feedbak the analog VFD's speed input Fernandoelec

Hi Sfardella, It depend of your pplication, but if is critically for your equipment, I suggest to you a presure sensor, I have used in appli cations with slurry and hard enviroments, if you have a fluid mixed this is a good option, for example you can use foxboro, ABB or Rosemount devices for...

you can find that information in the following address: www.modbus.org I hope that this thing can help you.Let me to know if this is right. Fernando Sánchez

jsrinivasu, In the following address you can to find all the information about the Modbus protocol: http://www.modbus.org/default.htm In the section Modbus serial line, in the category column, you must to choose "implementation guide", there you'll find a file calling...

jsrinivasu, In this address you can find all that your need about of Modbus protocol: http://www.modicon.com/techpubs/toc7.html Fernandop Sánchez

jsrinivasu, In addition to Macbeth info, you must to have the Mapping register of the device, cause when you´ll obtain communication you have to test the info. If you don´t know how to do the cable, let me to know, to give you some addresses where explain step by step the Job. If you can´t...

Hi, You give the properties only to the Mscomm control, rightnow you have to program the event Oncomm of that control, using select case with the variable commevent and in the case use number 2, use the Input property to capture the info, once do it, you must to store the data in a variable...

shenyee, What do you exactly need? I don´t have read yet "Magic Sinewaves" , but tell me your specific question. Fernando Sánchez

Hi friends, thanks a lot for your help (dydt,jbartos,electricpete,cbarn24050,tmahan), i found a test and measure procedure of IGBTS FUJI in the follow address: www.fujisemiconductor.com/pdf/app_notes/reh982.pdf , in the appnotes section, it correspond to an IGBT instruction manual where it...

Thanks to dydt and jbartos for your help, but I have a 1336 plus Allen Bradley AC drive, the dc bus fuse open and it trip by low DC bus level, it working with fuji IGBT, most exactly with the refference 2MBI300N-120, I want to test the IGBTs to determiente if any of them are failed, i tried to...

Please help me some one that knows how to measure an IGBT and how to test it. I´ll appreciate your help

Hi, my friends Some body knows how to test the IGBT's, more exactly Fuji Device can test it, or what is the circuit easiest to do it?? I'll appreciate your help. Fernando Sánchez