ABB S 754 DR-K25 2CDH784001R0517 S 754 DR

RET670 now includes a state-of-the art differential protection for phase-shifting transformers.

In terms of solution, the complex phase-shifting transformer is seen

as a single unit and only external CTs and VTs will be required. 

The differential protection is self-adaptive to the phase angle and voltage

ratio thereby making it extremely simple to configure, set and deploy.

The single phase and three phase circuit breaker failure protection are

now updated with a flexibility of having several different initiation conditions.

REC670 now includes 12 instances (from earlier 6 instances) of high-impedance differential protection functions. 

This increase will now allow coverage of applications with a higher number of zones using one single IED.

All 670 series products now include current/voltage/general delta supervision functionality. 

These can be used for delta calculation including vector shift calculation using instantaneous/RMS

magnitudes for usage in applications like comparators or release conditions.

All 670 series products now include current/voltage harmonic monitoring functionality. 

These functions are useful to monitor the harmonic distortion,

up to 5th harmonic, total harmonic distortion and total demand distortion.

All events are stored with a resolution of 1 ms in the central unit and in the BUs.

System, protection and test events can be generated.

Protection events refer to the protected busbar and include the changes in the disconnector and breaker positions,

trips, etc. Test events are recorded during testing with the test signal generator.

System events describe the diagnostic and fault messages of the NBP system as a whole.

Frequency protection, including overfrequency, underfrequency and frequency rate-of-change protection,

is offered in IEDs with standard configurations H and J. 

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