Low Burden
Wide operating voltage range
Wide frequency setting range 39. 00 to 70. 00 Hz
Independently adjustable tripping stages.
Consistent accuracy (± .03 Hz)
Unaffected by voltage fluctuations
Insensitive to harmonics & transient
Built in timer(.1 to 99.9 Sec.)
Built in event recorder for last three events.
Under frequency & over frequency relay with 2 to 4 frequency stages.
Adjustable under voltage blocking level.
Field Adjustable relay rated frequency
One operate time can give to each frequency stage.
Protection stages can be separately blocked via internal blocking inputs.
Application
ARMO UFT frequency relays are used to monitor the frequency of an electrical system. Due to inadvertent splitting of inner connection in power system, isolated areas of the system may become deficient in the generation & frequency of the same may drop considerably giving rise to emergency conditions. In order to maintain control of system tinder this low frequency emergency some form of grated load shedding in needed.
ARMO UFT relay is used to detect such condition & initiate load shedding to prevent complete system collapse.
Keywords
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