IEC 62128-3:2013规定了与固定装置中的电气安全相关的保护规定的要求，因为交流和直流电力牵引系统的相互作用很可能会对人或设备产生危险的电压或电流。它还适用于电力牵引系统维护工作期间确保电气安全所需的固定装置的所有方面。本标准适用于所有新线路、延长线和现有线路的所有主要修订。

IEC 62128-3:2013 specifies requirements for the protective provisions relating to electrical safety in fixed installations, when it is reasonably likely that hazardous voltages or currents will arise for people or equipment, as a result of the mutual interaction of a.c. and d.c. electric traction systems. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems. This standard applies to all new lines, extensions and to all major revisions to existing lines.