TM 5-688, TECHNICAL MANUAL FOREIGN VOLTAGES AND FREQUENCIES GUIDES (12 NOV 1999)

TM 5-688, TECHNICAL MANUAL FOREIGN VOLTAGES AND FREQUENCIES GUIDES (12 NOV 1999)., This manual identifies the classes of electrical equipment that are sensitive to frequency and voltage variations. Appendix B covers identification of various low and medium voltage levels, along with the system frequencies, used by countries around the world. Derating factors are discussed and developed for the six generic types of equipment in chapter 3. Appendix C summarizes the derating factors presented in chapter 3 for different voltage and frequency environments.