IEEE DRAFT 111 : 1998

1 Scope
2 Definitions
3 References
4 Symbols
5 Performance Tests
6 Marking
7 Service
8 Computations
9 Test Methods
10 Bibliography
Figures
Fig 1 Example of an Effective Series Inductance and Resistance with
        Various Windings Short-Circuited
Fig 2 Example of an Effective Series Inductance and Resistance of
        Winding (1-2) with Winding (3-4) Short-Circuited
Fig 3 Example of an Effective Series Inductance and Resistance of
        Winding (3-4) with Winding (1-2) Short-Circuited
Fig 4 Example of the Response of a Transformer with Matched Resistive
        Terminations and Typical Curves of Maximum Phase and Minimum
        Frequency Response
Fig 5 Example of Phase and Frequency Response
Fig 6 Response Definitions
Fig 7 Fictitious Typical Curves of Phase and Frequency Response Limits
Fig 8 Fictitious Typical Curves of Maximum Phase and Minimum Frequency
        Response
Fig 9 Example of the Tolerance Band of the Response of a Transformer
        with Matched Resistive Termination
Fig 10 Fictitious Typical Curve Time Delay
Fig 11 Example of the Impedance of Windings (1-3) with Windings (4-7)
        Terminated
Fig 12 Example of Return-Loss Resistance and Reflection Coefficient
        Curves for a Fictitious Transformer
Fig 13 Example of Loaded Impedance and Reflection Coefficient Curves
        for a Fictitious Transformer
Fig 14 Balance Definition and Balance Test Methods
Fig 15 Three-Terminal Equivalent Networks Determined from Open and Short
        Circuit Measurements
Fig 16 Often Valid Approximations for the Equivalent Circuit of Fig 6
Fig 17 Impedance Characteristics of Transformers Used in Examples
Fig 18 Example of an Effective Parallel Capacitance and Conductance of
        Winding (1-2) with Winding (3-4) Open
Fig 19 Example of an Effective Parallel Inductance and Resistance of
        Winding (1-2) with Winding (3-4) Open
Fig 20 Example of an Effective Parallel Inductance and Resistance of
        Winding (3-4) with Winding (1-2) Open
Fig 21 Example of an Effective Parallel Capacitance and Conductance of
        Winding (3-4) with Winding (1-2) Open
Fig 22 Impedance Bridges
Fig 23 Return Loss Bridges
Fig 24 Return Loss Measurement
Fig 25 Hybrid Transformer
Appendixes
Appendix A Definitions and Discussion
Appendix B Recommended Practice for Making Electrical Tests
Appendix C Service Conditions
Appendix D Methods of Computing Time Delay From Phase Shift Measurements
       

Standard deals with electronics wide-band transformers transmitting power within a wide band of frequencies covering typically at least one decade in the frequency spectrum. Not intended for transformers optimized to function within a narrow band of frequencies.