SOTA - monitoring and protection system

• Traction network parameters monitoring
• Protection of traction network against short circuit currents and harmful overloads
• Cubicle operation control (PLC)
• Waveforms recording in case of emergency processes
• Events logging
• Storage of daily trends
• Data storage for further analysis
• System remote control
• Support of multiple communication protocols

Traction network protection is provided by continuous control and analysis of traction network current and voltage dynamics history with issuing commands to open DC switchgear high speed circuit breaker in case of protection functions set parameters exceed.

Two emergency oscillograph records are generated and stored when one of the protective functions operates:

• Fast Track record (the depth of outreach by time is 100 ms);
• Slow Track record (the depth of outreach by time is 100 s).

SOTA^® system also provides long-term monitoring of power supply parameters. Current and voltage values are stored as "daily trend" with 2 points per second resolution.

SOTA^® generates and stores the following records:

• events log;
• failures log;
• emergency oscillograph records;
• daily trends.

Emergency oscillograph records

The records are stored on nonvolatile solid data storage medium that guarantees high reliability and data storage in case of devices power supply interruption.

Emergency records can be:

• viewed using Web interface;
• read by upper level system via Ethernet interface;
• saved on external USB-disk for later
  analysis using a PC.

Long-term monitoring

SOTA^® accumulates data on the power network parameters, which are saved to file for later analysis (trend file). The system stores files for the last 30 days of module operation.

Alarm Viewer 2024 application is designed to view SOTA^® alarm records.

Main functions:

• cross-platform (Windows and macOS);
• multilingual interface with subsequent support for additional languages;
• possibility to print directly from the application using standard dialog boxes;
• possibility to export to PDF directly from the application for further analysis and viewing without using the application;
• simple and convenient installer and uninstaller for Windows;
• standard installation and uninstallation in macOS;
• convenient diagram navigation (move, zoom);
• availability of detailed information about emergency record;
• two measuring markers with calculation of their values difference;
• possibility to display current curve for convenient viewing in case of wrong shunt polarity;
• user-friendly, intuitive interface.

Optionally, the system is equipped with additional systems (modules) that extend functional range of the system as a whole.

Cable insulation control system
The system continuously monitors cable insulation resistance and in case of insulation degradation gives a warning signal to open high-speed circuit breaker. Cable insulation control system is provided for internal and external cable insulation resistance values measurement in traction networks up to 1500  V DC.

Data transfer between cable insulation control system and SOTA^® processing module is going via optical fiber.

Moreover, optical fiber provides galvanic isolation between systems modules and ensures safe usage of device.

Line impedance measuring system
Line impedance measuring system allows to determine line impedance before high-speed circuit breaker closing. In case line impedance is lower than the setting parameter, the system issues a prohibition to close high-speed circuit breaker.