Demagnetising a saturated CT
Demagnetising a saturated CT
(OP)
Sir,
Please explain the method for demagnetising a saturated CT. Can we assure 100% success in demagnetising the saturated CTs of all types with these methods?
with regards,
appunni
Please explain the method for demagnetising a saturated CT. Can we assure 100% success in demagnetising the saturated CTs of all types with these methods?
with regards,
appunni






RE: Demagnetising a saturated CT
Slowly reduce the supply voltage to zero. You have cycled the CT through the B-H curve and this should remove any residual magnetism. You can confirm this by plotting the voltage-current characteristic before and after the procedure - the difference in magnetizing curve will demonstrate the demagnetization, assuming that you did in fact start with a Ct that had remanent magnetism present.
RE: Demagnetising a saturated CT
See http://www.geindustrial.com/products/applications/GET-97D.pdf under “Magnetic Bias.”