Testing of current transformers

G - Physics – 01 – R

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G01R 31/00 (2006.01) G01R 25/00 (2006.01) G01R 31/26 (2006.01)

Patent

CA 2496214

A method for evaluating the accuracy of a current transformer is presented. The current transformer has a primary winding and a secondary winding. A current is not circulated through the primary winding. A load is disconnected from the current transformer. A load impedance is measured of an internal instrumentation associated with the current transformer. The resistance in the secondary winding of the current transformer is determined. The load impedance is compared to a standard burden. A standard burden value is selected. The secondary voltage for a rated current is determined. The injection voltage is adjusted to the value of the secondary voltage. The exciting current and power are measured. The ratio error or the phase angle are then calculated by using the exciting current and power.

La présente invention concerne une méthode d'évaluation de la précision d'un transformateur de courant. Un tel transformateur comporte un enroulement primaire et un enroulement secondaire. Du courant ne circule pas dans l'enroulement primaire. Une charge est débranchée du transformateur de courant. Une impédance de charge est mesurée d'un instrument interne relié au transformateur de courant. La résistance dans l'enroulement secondaire du transformateur est déterminée. L'impédance de charge est comparée à une charge normale. Une valeur de charge normale est choisie. La tension secondaire pour un courant nominal est déterminée. La tension d'injection est ajustée en fonction de la valeur de la tension secondaire. Le courant et la puissance de sortie sont mesurés. L'erreur de rapport ou l'angle de déphasage sont alors calculés au moyen du courant et de la puissance d'excitation.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Testing of current transformers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Testing of current transformers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing of current transformers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1465089

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.