Übersetzung für "Tripping coil" in Deutsch

On the other hand, the brief current flow through the main tripping coil can be detected as a brief voltage drop at the charge storage device.

If, in contrast, the watchdog pulses are absent due to a failure, then the charging capacitor soon reaches a voltage level that causes the comparator to toggle and, via its output, in turn, a tripping coil becomes excited, as a result of which the circuit breaker opens.

As a result, if the circuit breaker is switched on during an already existing short circuit, then the very high test signals emitted by the current detectors as a function of the short circuit situation are processed by the comparator into load pulses for the charging capacitor, said pulses then causing the tripping coil to be actuated within a very short time.

The main contactors 2 are opened and closed by means of actuators 10 that normally have an actuation mechanism 12 and an electromagnetic tripping coil 14 .

If the test signals Ui exceed certain settable parameters, especially the tripping current and the appertaining delay time, then the tripping device 20 sends a first tripping signal Uc to a first OR-input of an actuation circuit 9 in order to excite the tripping coil 14, thus automatically opening the main contactor 2 .

On the one hand, the brief current flow through the auxiliary tripping coil can advantageously be detected as a brief voltage drop across a resistance.

If the control voltage disappears, whether through intentional control or because of a defect in the supply feeder, the main disabling element is closed in order to return the armature to the dropped-out position by discharging the charge storage device through the main tripping coil.

Advantageously, the current-monitoring means are formed by a current-sensing resistor placed in series with the auxiliary tripping coil, and a downstream first amplifier circuit.

During the testing of the main disabling branch, it is detected whether the voltage drop at the charge storage device caused by the current surge in the main tripping coil is within a predeterminable window.

However, if, at any time during the first test steps, no voltage drop is detected across current-sensing resistor R 6, then initially the armature is moved to the dropped-out position by turning on main tripping coil L 3 through discharging of charge storage device C 1, and, by way of the OFF state, which has been reached in the meantime, the final state OUT OF SERVICE is assumed by short-circuiting control voltage Vi.

In the drop-out mode, free-wheeling circuit FL would represent a significant additional load for charging capacitor C 1 because of the electromagnetic coupling through mutual inductance between closing coil L 1 and main tripping coil L 3 .

Method step B starts at instant tB 1 with the output of an auxiliary disable signal ABr of 0.3 ms for the testing of the auxiliary disabling circuit, whereupon the brief current IL 4 through auxiliary tripping coil L 4 generates an auxiliary confirmation signal SD.

To this end, in a first test step of method step B, auxiliary tripping coil L 4 is energized for a period of 0.3 ms.

However, if, at any time during the second test steps, no voltage drop is detected across charge storage device C 1 within the specified window, then initially the armature is moved to the dropped-out position by turning on auxiliary tripping coil L 4, which is supplied by the control voltage source, and, by way of the OFF state, which has been reached in the meantime, the final state OUT OF SERVICE is assumed by short-circuiting control voltage Vi.

Microcontroller MC is programmed such that it is initialized by a reset signal occurring after some delay at the output of control voltage controller BVi upon application of control voltage Vi, that it causes auxiliary disabling element T 4, and subsequently main disabling element T 3, to turn on, i.e., to become conducting, for the purpose of testing, that it activates enabling element T 1 in a pulse-controlled manner in order to move the armature to the attracted position, that it subsequently deactivates enabling element T 1, and that when control voltage Vi is removed, it closes main disabling element T 3 in order to move the armature to the dropped-out position, in which process the electromagnetic restoring force is obtained from the charge of charge storage device C 1 flowing off through main tripping coil L 3 .

When control voltage Vi is removed, whether through intentional control or because of a defect in the feeder or in the generation of control voltage Vi, the drop-out mode is carried out in accordance with method step E. In the process, charging capacitor C 1 is discharged through turned-on main tripping coil L 3, whereupon the armature moves to the dropped-out position and the electromagnetic operating mechanism changes to the OFF state, respectively.