One critical source of information on power protection is the IEEE "color book" series, especially the following:
The Emerald Book, IEEE Recommeded Practice for Powering and Grounding Electronic Equipment, Std. 1100-1999, 1999.
The Gold Book, IEEE Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems, Std. 493-1997, 1997.
The Green Book, IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems, Std. 241-1990, 1990.