Monitoring circuit for monitoring a voltage
AssigneeHolec Holland N.V.
InventorsArend Jan Willem Lammers, Gerrit Willem Hendriks
Life of this patent
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Abstract
Monitoring circuit for monitoring a voltage, comprising a coil, which is incorporated in a first current branch to be connected to the voltage to be monitored, and an auxiliary relay, the actuating winding of which is incorporated in a second current branch connected in parallel to the first current branch. In the first current branch a first make contact of the auxiliary relay is connected in series with the coil. In the second current branch a first resistor is connected in series with the actuating winding of the auxiliary relay. A series circuit consisting of a second resister and a second make contact of the auxiliary relay is connected in parallel to the actuating winding of the auxiliary relay.
Claims2
Monitoring circuit for monitoring a voltage, comprising a coil (S), which is incorporated in a first current branch to be connected to the voltage to be monitored, and an auxiliary relay, an actuating winding (A) of which is incorporated in a second current branch connected in parrallel to the first current branch, characterised in that in the first current branch a first make contact (a1) of the auxiliary relay is connected in series with the coil, in that in the second current branch a first resistor (R2) is connected in series with the actuating winding (A) of the auxiliary relay and in that a series circuit of a second resistor (R3) and a second make contact (a2) of the auxiliary relay is connected in parallel to the actuating winding (A) of the auxiliary relay.
Dependencies are inferred from the claim text.