简单描述：

The digital protection for catenaries and feeders PDZIN 1 protects fixed installations of electric traction, in charge of feeding catenaries with 25 kV or 2 x 25 kV, 50 or 60 Hz. It is used for fast and reliable operation against short-circuits in any condition and can be provided with automatic recloser. Configured with 2 sets of parameters, it allows easy adaptation to a change of operating mode. Help to network operation Monitoring and assistance to maintenance of CB Inrush insensitive Safe operation with secured tripping circuit

详细介绍：

Using complementary algorithms, the PDZIN 1 provides protection against feeder and catenary faults and acts as a distance relay while integrated fault locator improves maintenance efficiency. The PDZIN 1 includes as well a De-icing protection: Desensitizing to de-icing current Threshold of de-icing current