Protection Relay


he protection relays developed by ATALAB are devices for use in power plants distributing over medium voltage lines. Power lines carrying power to these power plants are called medium voltage supply cables (feeders). Feeder lines are connected to systems called cells. Inside the cell is the breaker, which is an electro-mechanical switch, and a relay that controls this breaker. The products developed by ATALAB are these relays.

This relay provides or blocks the transmission of current coming from the feeder by controlling the breaker when necessary. For this, the protection relay monitors the current coming from the feeder it is responsible for and disables the cell in abnormal situations such as high current or high voltage. However, the protection relays are aimed at ensuring the coordinated management of the cells existing in the network, rather than the management of individual cells. Relays provide this coordination by communicating with the central SCADA (Supervisory Control and Data Acquisition) system and each other. When an abnormal situation is detected, it is aimed to identify the source of the problem automatically and put the necessary measures into action in order to prevent damage and prevent power failure if possible. Relays communicate with each other according to the central SCADA system and protocols defined in IEC 61850 standard.

MMS protocol is about the central system of the relay and GOOSE (Generic Object Oriented Substation Events) protocol is about the communication of the relays with each other.

Technical Specifications

  • IEC 61850 GOOSE and MMS communication protocol (KEMA Level A certified)
  • A single device that performs protection, control and monitoring functions together
  • Mechanical design with drawers for fast, easy change and maintenance
  • 8 different setting groups
  • Colorful and large user interface 3.5 inch TFT-LCD
  • User-friendly interface allows instant measurement and failure monitoring and easy change of device settings
  • Fast and reliable connection between Fiber and Copper Ethernet interfaces to SCADA system and relays
  • User support with different authorization levels
  • Logging and alarm management
  • Broad communication protocol support is provided as standard: IEC 61850, Modbus (TCP and RTU), IEC 60870-5-103
  • RS-485 serial communication interface
  • Built-in 4-port Ethernet Switch feature
  • Mechanical design resistant to harsh environmental conditions

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