Description
USED TESTED
BU1-AC – AC-voltage relay
Application Over- and undervoltage supervision of 1- and 3-phase systems.
Function
Unit BU1-AC is equipped with an independent over-(U>) and undervoltage supervision (U<) with separate adjustable pickup values and common trip delay (t)
and hysteresis (DIFF). The voltages are compared with the set reference values.
For three-phase overvoltage supervision the highest voltage in each phase is evaluated, for undervoltage supervision the lowest in each phase.
Pickup of supervision circuit U> or U< is indicated by flashing of the corresponding LED.
At U< – tripping LED U< extinguishes, at U> – tripping.
LED U> is steady lit.
At voltages < 60 % Un no trip delay takes place.
Technical data
rated voltage Un: 110 V
rated frequency range: 45 – 66 Hz
power consumption in voltage circuit: 3.5 VA
thermal load carrying capacity of the voltage circuit: constant 1.3 x Un
dropout to pickup ratio: dependent on the set hysteresis
dropout time: 300 ms
minimum operating delay: 300 ms
Seller is not responsible for any arising foreign charges at the buyers country such as but not limited to customs duties.
