Technology that supports high-density and high-speed operations.
Our company offers a "Window-type Fault Selection Device (50F)" that continuously monitors the feeding current within a fault detection window defined by the current setting value I (Y-axis) and time axis ΔT (X-axis). When the current exceeds the ceiling (setting value) of the window, it is judged as a fault. This device is installed in the feeding circuit of the DC electrified section and features a constant display function for the protective circuit current. There are two types available: 2 circuits/unit and 4 circuits/unit, which enhance reliability through dual current detection. Additionally, it detects feeding faults by continuously monitoring the current increase amount (increment value iw) at regular intervals (40/80ms). 【Features】 ■ Suitable for high-acceleration, high-density, and large-capacity trains ■ Compatible with regenerative train operation ■ Quick detection, visible observation of fault current, and easy estimation of fault current ■ Sufficient reliability, compact design, and low cost ■ By adding a function to distinguish vehicle faults (optional), it prevents unnecessary opening of the DC high-speed circuit breaker at the substation during vehicle faults. *For more details, please feel free to contact us.
Inquire About This Product
basic information
【Form】 ■EFD-W-4Z (4 lines) ■EFD-W-2Z (2 lines) ■EHC-4-30KA4 (conversion section) *For more details, please feel free to contact us.
Price range
Delivery Time
Applications/Examples of results
For more details, please feel free to contact us.
catalog（1）
Download All Catalogs
Company information
Since our establishment in 1950, we have contributed to the safe and stable transportation of railways and the improvement of services through the manufacturing of protective devices and measuring equipment for electric substations of various railway companies, including JR companies and public-private railways, as well as broadcasting equipment and information transmission devices for each station, and other various facilities. Moving forward, we will continue to nurture our strengths and key technologies that we have developed over the years, actively engage in product development that accurately responds to the diverse demands of the times, and work together as a united team to create products that railway operators can trust even more.