| ??? 02/06/10 10:08 Read: times |
#172941 - Different Issue! Responding to: ???'s previous message |
Ap Charles said:
The below links belongs to Public organizations stating what their take for DCCT is:
Batavia, IL USA GOVT http://www.fnal.gov/pub/now/definitions/dcct.html Yes - but that needs to be specificall called a DCCT - it is not just a plain "CT". It is a device that has a sepatate excitation coil, and measures DC indirectly by its effect on the saturation of the core. And this, in turn, is entirely different from a Hall-effect based sensor. Again, if you just say "CT", then that has to mean that a basic Current Transformer will do the job. If either a DCCT or a Hall-effect device is required - as in this case - then you must specifically say so. Just saying "CT" is likely to be misleading. True Transformer and False Transformer is not the part of discussion but Abbreviations. Wrong. The term "transformer" specifically means an inductively-coupled device - so calling a Hall-effect device a "transfomer" is plain wrong. It's not just an abbreviation, it's wrong. I said earlier It should have been mentioned DCCT ! Yes you should! If the question asked is for measuring DC Yes it is - it was clearly stated! then a CT that measures DC current should be used. You mean could be used; there are still other choices - including things based on the Hall effect that are not in the form of a "current transformer" (sic). |
