ABB REC670 1MRK004814-AC Protection Relay

ABB REC670 1MRK004814 - AC protection relay is a device for control, protection and monitoring of various bay types in power networks. Its related information is as follows:

Functional features:

Synchronous control and protection: With synchronous control function, circuit breaker closing interlocking can be realized to ensure correct synchronization in both synchronous and asynchronous networks. Diverse protection functions can adapt to different station types and busbar arrangements, automatic reclosing function (including priority circuits for multi-circuit breaker settings) can enhance system resilience, and circuit breaker failure function can ensure that the system can continue to operate in the event of a fault.

Rich protection functions: Provides a variety of protection functions, including high-set instantaneous phase overcurrent and ground overcurrent protection, directional or non-directional delayed phase overcurrent and ground overcurrent protection, thermal overload protection, and undervoltage and overvoltage protection, which can be customized according to specific application requirements.

Multi-feeder protection and control: Equipped with six overcurrent, ground fault, auto-reclosing and metering functions, it can be used as a multi-function multi-feeder protection and controller for distribution buses with a multi-display local human-machine interface (HMI). Bidirectional channels facilitate inter-tripping and binary signal transmission between IEDs within a station or adjacent stations. Advanced logic functions configured through graphical tools can realize special applications such as automatic disconnection of disconnectors, circuit breaker ring network closing and load transfer. Graphical configuration tools can also simplify the testing and commissioning process.

Fault recording and fault location: With fault recording and fault location functions, independent post-fault analysis can be performed to help identify major disturbances and single faults in the protection system.

Application scenarios: Applicable to power network systems with distributed control IEDs, it performs well in high-voltage level systems and can effectively manage equipment in various switchgear arrangements. It can be controlled remotely through SCADA/substations or locally through HMI. It is suitable for a variety of control configurations, either using one control IED per bay or sharing multiple bays.