The REF 543 feeder terminal is designed for protection, control,
measurement and supervision in medium voltage networks.
The REF 543 feeder terminal can be used with different kinds of switchgear,
including single busbar, double busbar and duplex systems.
The protection functions also support different types of networks, such as, isolated neutral networks,
resonant-earthed networks and partially earthed networks.
For optimized control and reliable operation of your switchyard, the REC670 is your best choice for transmission applications.
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 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.
REC670 integrates advanced voltage control for transformers in a substation in a single IED.
The IEDs feature a large HMI for local control and instant access to important data,
such as settings, events and disturbance information.
The outstanding I/O capability in REC670 enables control of several bays with complete measurement with only one IED.
For instance, one REC670 IED is capable of handling control of all apparatuses
in one entire diameter in 1 ½ breaker arrangement including breaker failure protection for all breakers.
The REF 543 feeder terminal is designed for protection, control,
measurement and supervision in medium voltage networks.
The REF 543 feeder terminal can be used with different kinds of switchgear,
including single busbar, double busbar and duplex systems.
The protection functions also support different types of networks, such as, isolated neutral networks,
resonant-earthed networks and partially earthed networks.
Protection functions
The IED offers directional and non-directional overcurrent and thermal overload protection as
well as directional and non-directional earth-fault protection.
Some standard configurations allow as an option admittance-based, harmonics-based or wattmetric-based earth-fault protection to be
used in addition to directional earth-fault protection.
Further, the IED features sensitive earth-fault protection, phase discontinuity protection, transient/intermittent earth-fault protection,
overvoltage and undervoltage protection, residual overvoltage protection, positive-sequence undervoltage
and negativesequence overvoltage protection.
The outstanding I/O capability in REC670 enables control of several bays with complete measurement with only one IED.
For instance, one REC670 IED is capable of handling control of all apparatuses
in one entire diameter in 1 ½ breaker arrangement including breaker failure protection for all breakers.
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