Section 2 Application
2.1 General IED application
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RER670 is used for the protection, control and monitoring of transmission lines,
catenary lines or transformers in two- and single-phase 16.7Hz, 50Hz and 60Hz
railway applications. It supports isolated, compensated and solidly earthed
networks.
The line protection covers distance protection functions with quadrilateral or
circular starting characteristic. The six zones have fully independent measuring and
setting which gives high flexibility for all types of lines. Load encroachment and
adaptive reach compensation are included.
Communication to the remote ends can be used for even more selective protection.
Backup functions like directional earth fault or overcurrent as well as breaker
failure protection are equally available as autoreclosure and synchrocheck
functions.
A line fault locator for up to 10 line segments supports ef
ficient remedial actions
after faults on the transmission line.
The transformer protection covers transformer differential protection for two-phase
to two-phase as well as two-phase to one-phase transformers. Besides the
transformer differential protection, a wide range of backup functions are available.
A very fast transformer tank protection helps to avoid damages in case of short
circuits to the transformer tank.
The transformer energizing functions allow smooth energizing of transformers to
minimize stress on equipment and power system which operate at 16.7Hz.
The control functionality can be combined backup, line or transformer protection to
use RER670 as protection, control or combined protection and control IED.
The autorecloser co-operates with the synchrocheck function with high-speed or
delayed reclosing.
Logic is prepared with a graphical tool. The advanced logic capability allows, for
example, to combine protection functions with logic gates or to create custom
solutions.
Disturbance recording is available to allow post-fault analysis after primary
disturbances.
1MRK 506 375-UEN A Section 2
Application
Railway application RER670 2.2 IEC 25
Application manual
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