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Protection always active
The PR512 are the self-supplied type of relay and
ensure complete installation protection even
without an auxiliary power supply.
The energy for correct operation and for circuit-
breaker tripping is supplied by the same current
transformers which also make the current signal to
be processed available.
Operation is ensured even with the primary circuit
with single-phase power supply.
Thanks to these characteristics, the PR512 are
also suitable for use in unmanned distribution
substations without auxiliary services.
Use
The PR512 relays can be installed in medium
voltage primary or secondary distribution switch-
boards for protection of MV/LV lines and trans-
formers.
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