Introduces the principle of frame leak protection in DC traction power supply system, and compares it with OVPD to explain the cooperation of them.
介绍了直流牵引供电系统中常见的框架泄漏保护装置的原理，并与轨电位装置进行比较，说明两者的配合。
Introduces the principle of frame leak protection in DC traction power supply system, and compares it with OVPD to explain the cooperation of them.
介绍了直流牵引供电系统中常见的框架泄漏保护装置的原理，并与轨电位装置进行比较，说明两者的配合。
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