Ethernet-based
• SNTP (Simple Network Time Protocol) With special time synchronization wiring
• IRIG-B (Inter-Range Instrumentation Group - Time Code Format B)
The relay supports the following high accuracy time synchronization method with a time-stamping
resolution of 4 µs required especially in process bus applications.
• PTP (IEEE 1588) v2 with Power Profile
The IEEE 1588 support is included in all variants having a redundant Ethernet communication module.
IEEE 1588 v2 features
• Ordinary Clock with Best Master Clock algorithm
• One-step Transparent Clock for Ethernet ring topology
• 1588 v2 Power Profile
• Receive (slave): 1-step/2-step
• Transmit (master): 1-step
• Layer 2 mapping
• Peer to peer delay calculation
• Multicast operation
Required accuracy of grandmaster clock is +/-1 µs.
The relay can work as a master clock per BMC algorithm if the external grandmaster clock is not available for short term.
The IEEE 1588 support is included in all variants having a redundant Ethernet communication module.
In addition, the relay supports time synchronization via Modbus, DNP3 and IEC 60870-5-103 serial communication protocols.

REC670 IEDs (Intelligent Electronic Device) provide control solutions for any type of switchgear and different switchgear configurations.
The customized REC670 gives you the freedom to select the functionality entirely according to your needs.
The protection functions also support different types of networks, such as, isolated neutral networks,
resonant-earthed networks and partially earthed networks.
The application area also covers medium-sized three phase asynchronous motors as well as
protection and control of shunt capacitor banks used for reactive power compensation.
In addition to protection, measurement, control, condition monitoring and general functions,
the REF 543 feeder terminals are provided with a large amount of PLC functions,
which allow for several automation and sequence logic functions, needed for substation automation, to be integrated into one unit.
The pre-configured REC670 variants simplify handling since the basic functionality is included and pre-configured.
If needed, you can add optional functions to easily increase the functionality of
the REC670 IEDs to meet the specific requirements of your switchyard.
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