SOTA® is an integrated microprocessor relay protection device that combines PLC functions and protection systems.
The use of modular architecture in SOTA® devices, along with modern surface-mount technologies, provides high reliability, high computing power and speed, as well as high accuracy in measuring electrical values and time intervals, which makes it possible to increase the performance of computing processes and the sensitivity of protective functions.
SOTA® is used in switchgears of traction substations of urban transport, metro, electrified railways, industrial enterprises, as well as mining enterprises. SOTA® can also be used to automate any process (version without protection system).
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:
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.
|Imax||76||time overcurrent protection|
|di/dt||-||current rate of rise protection|
|∆I||-||current increment directional protection|
SOTA® generates and stores the following records:
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:
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 2018 application is designed to view SOTA® alarm records.
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 tester 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.
Please contact us in case you have any technical queries, requests regarding customized procurement or delivery time of equipment.