Basler Electric BE1-81O/U Digital Frequency Relay

Overview

BE1-81O/U relays provide accurate and secure protection for underfrequency

or overfrequency system conditions.

Features

• Reliable solid-state digital circuitry.

• Up to four independent frequency set points.

• Over or underfrequency sensing selectable for each set point.

• Convenient, precise selection of the set point frequency over the

nominal range of 40 to 70 Hz.

• Individually adjustable time delays and LED indicators for each

frequency set point.

• Optional definite time delay characteristic.

• Undervoltage inhibit prevents undesired relay operation and provides an

indication of the inhibiting condition over the adjustable range of 40 to

120 Vac.

• Excellent timing accuracy and repeatability.

• Low sensing and supply burdens.

Benefits

• Provides accurate frequency protection for a distribution system

or generator operating at 50 or 60 Hz.

• Accurate, repeatable, and reliable operation.

• Incrementally-staged load shedding possible with up to four

independent frequency set points.

• Flexible protection options with selectable overfrequency or

underfrequency sensing for each set point.

• Clear settings indication from individually adjustable time delays

and LED indicators for each frequency set point.

• Minimized PT (potential transformer) costs as a result of low

sensing burden.

• Reduced battery load with low burden power supply.

• LED targets provide clear annunciation of status.

• Easily perform in-case system and device tests using test plugs.