ABB REC670 1MRK004814-AC is a bay control device manufactured by ABB, belonging to the REC670 series. It is widely used in the protection, control, and monitoring of power systems, playing a key role especially in substation automation systems. The device is specifically designed for substation automation applications, enabling the monitoring, protection, and control of switchgear (such as circuit breakers and disconnectors) in power systems, and it supports advanced voltage control functions.

Protection Functions:

Provides comprehensive protection functions, including instantaneous phase and earth fault overcurrent protection, four-stage directional or non-directional time-delayed phase and earth fault overcurrent protection, thermal overload protection, undervoltage and overvoltage protection, among others.

Control Functions:

Supports multiple control modes, allowing for the control of a single bay or multiple bays simultaneously. It features electrical interlocking to ensure the reliability and safety of control operations.

Monitoring and Diagnostic Functions:

Equipped with a large HMI for local control and immediate access to critical data such as settings, events, and disturbance information. It integrates fault recording and event logging capabilities, enabling the recording of parameter changes before and after faults to assist maintenance personnel in analyzing fault causes.

Communication Capabilities:

Supports various communication protocols, such as IEC 61850, IEC 60870-5-103, TCP/IP, and EIA-485 DNP3.0, facilitating communication with remote monitoring systems, SCADA systems, and more.

Flexibility and Scalability:

Supports customizable functions, allowing users to select functional modules according to their needs. Preconfigured REC670 models simplify operation, with basic functions already included and pre-set, while optional functions can be added as required.