Содержание
- 2. Измерительные трансформаторы тока и напряжения применяют в качестве преобразователей больших переменных токов и напряжений в относительно
- 3. secondary windings are rated for 5 A and 1A Also 2, 2.5, 10, 20 A CT
- 4. the leakage impedance of the primary winding Zx1 has no effect on the performance of the
- 5. CT phasor diagram the voltage Em across the magnetizing impedance Zm is given by Em =
- 6. The per unit current transformation error defined by The ratio correction factor R is defined as
- 7. Example Consider a current transformer with a turns ratio of 500 : 5, a secondary leakage
- 8. Since the magnetizing branch of a practical transformer is nonlinear, Zm is not constant, and the
- 9. The magnetizing characteristic of a typical CT is shown in this Figure This being a plot
- 10. Из анализа полученных уравнений можно сделать следующие выводы: При возрастании сопротивления вторичной обмотки или ее разрыве
- 11. Polarity markings on CT windings Example Consider the CTs shown in Figures (a) and (b) If
- 12. Wye and delta connections In three-phase circuits, it is often necessary to connect the CT secondaries
- 13. Consider the CT connections shown in Figure The wye connection shown in Figure (a) produces currents
- 14. Principle of the magneto-optic current transformer (MOCT) Most of the practical electronic CTs are based upon
- 15. This angular shift is electronically converted to a voltage, which is proportional to the instantaneous value
- 16. Voltage transformers Voltage transformers – also known as potential transformers – are normal transformers with the
- 17. Are the more usual sources for relaying and metering. In passing, we may mention a possible
- 18. Coupling capacitor voltage transformers CCVT Connections and equivalent circuit
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