Contents:

1.    Basic Principles of Protective Relays

2.    Development of Static Relays

3.    Basic Semiconductor Devices and Circuits

4.    Comparators

5.    Output Devices; D. C. Supply; Transient Overvoltages

6.    Power System Faults

7.    Current and Potential Transformers

8.    Overcurrent Directional Relays

9.    Different Relays

10.  Distance Relays

11. Steady-state Sources of Distance Relay Error

12. Multi-input Comparators

13. Heating, Harmonics and Load-Shedding

14. E. H. V. Line Protection

15. Pilot Differential Protection

16. The Future