Application
RET670 provides fast and selective protection,
monitoring and control for two- and three-winding
transformers, autotransformers, generator
transformer units and shunt reactors. The
transformer IED is designed to operate correctly
over a wide frequency range in order to
accommodate power system frequency variations
during disturbances and generator start-up and shut-down.
A very fast differential protection function, with
automatic CT ratio matching and vector group
compensation, makes this IED the ideal solution
even for the most demanding applications. Since
RET670 has very low requirements on the main
CTs, no interposing CTs are required.
It is suitable for differential applications with multi-breaker
arrangements with up to six restraint CT inputs.
The differential protection function is provided
with 2nd harmonic and wave-block restraint
features to avoid tripping for magnetizing inrush
current, and 5th harmonic restraint to avoid tripping for overexcitation.
wechat/whatsapp:
+86-181-4410-0983
Email: kongjiangauto@163.com
Copyright © 2009 - 2024 Cld , All Rights Reserved K-JIANG All rights reserved