BS EN 50123-7-2:1999 Railway applications - Fixed installations - d.c. switchgear - Measurement, control and protection devices for specific use in d.c. traction systems - Isolating current transducers and current measuring devices
2003BS EN 50123-7-2:2003 Railway applications - Fixed installations - d.c. switchgear - Measurement, control and protection devices for specific use in d.c. traction systems - Isolating current transducers and other current measuring devices
1999BS EN 50123-7-2:1999 Railway applications - Fixed installations - d.c. switchgear - Measurement, control and protection devices for specific use in d.c. traction systems - Isolating current transducers and current measuring devices