A generator of a gearless wind power installation, with a rotor and a stator, wherein at least the rotor or the stator is provided with a fuse wire, for detecting a local temperature increase, and wherein the fuse wire comprises an electrically conducting material and the electrically conducting material melts when a predetermined temperature is reached, and thereby brings about an interruption of the electrical conduction, in order thereby to detect the local temperature increase.

In one aspect, an apparatus includes a battery. The battery includes at least one battery cell and a casing that houses the at least one battery cell. The apparatus also includes a fuse. The fuse includes material configured to dissolve based on chemical interaction with matter from the at least one battery cell.

A voltage detecting apparatus includes: a voltage detecting unit configured to detect a voltage of a battery supplying power to a load; a discharge circuit configured to discharge the battery; a protection circuit disposed between the voltage detecting unit and the battery and between the discharge circuit and the battery; and a determination unit configured to estimate an internal resistance of the protection circuit on the basis of a first voltage detected by the voltage detecting unit when the discharge circuit is in a non-operating state and a second voltage detected by the voltage detecting unit when the discharge circuit is in an operating state and determine a half-cut state of the protection circuit on the basis of a result of the estimation.

A device for monitoring the activity of at least one first and one second processing unit fitted to an electric trip unit, each processing unit including a first activity-indicating circuit sending an activity signal to another processing unit and a monitoring circuit comparing a received activity signal with a reference signal. Each processing unit activates a first tripping circuit and/or an auxiliary output when the received activity signal is different from the reference signal. A circuit-breaker including such a monitoring device and a method for monitoring the operation of an electric trip unit including at least two processing units.

The invention relates to a circuit assembly for the state monitoring and logging of overvoltage protection devices or overvoltage protection systems by means of pulse current monitoring, comprising at least one passive RFID transponder having an inductively coupled voltage supply, wherein in the case of an event of the overvoltage protection device or the overvoltage protection system, the RFID transponder antenna circuit is influenced, in particular interrupted, short circuited, or detuned, so that disturbance processes can be identified. According to the invention, a coil L2 is provided on a discharge line of the overvoltage protection device or the overvoltage protection system that carries pulse currents that occur, which coil L2 is oriented in such a way that the field caused by pulse current passes through the coil winding surface, wherein the coil L2 is connected to at least one switching device, which is connected on the antenna circuit of the RFID transponder to the inductor L1 there in order to influence the antenna circuit at least at times.

An electrical switch for providing power from a power source to a component may include a voltage supervisor having an input and an output, a voltage divider, electrically coupled between the input of the voltage supervisor and ground, an RC filter electrically coupled to the output of the voltage supervisor, and a field-effect transistor having a first terminal coupled to the RC filter and a second terminal coupled to an output of the switch, the output configured to be electrically coupled to the component. A switch may additionally or alternatively include a light source electrically that emits light when power is provided from the input of the switch to the component, the light source arranged proximate a fuse so as to illuminate the fuse.

A device for monitoring an interruption unit in an electrical energy supply network. In order to reduce the cost incurred by a network operator in detecting and localizing tripped interruption units, the device has a sensor interface for connecting a sensor unit that records a measured value specific to the interruption unit. An evaluation unit is connected to the sensor interface and configured to detect a current change in terms of the current flowing through the interruption unit on the basis of the measured value. A communication interface is connected to the evaluation unit. In the event of a detected current change, a status signal indicating a critical status of the interruption unit is transmittable to a communication unit. We also describe a method for monitoring an interruption device, and a distribution station with a device for monitoring an interruption device.

A device includes first and second device terminals, a fuse, a first circuit, a first transistor, and a control circuit. The fuse terminal couples to the first device terminal. The first circuit couples to the second fuse terminal. The second fuse terminal has a first voltage. The first transistor has a first control input and first and second current terminals. The first current terminal couples to the second fuse terminal, and the second current terminal couples to the second device terminal. The control circuit: turns on the first transistor into a saturation region if the first voltage exceeds a threshold and a current through the fuse exceeds a trip threshold current of the fuse; and turns on the first transistor into a linear region if the first voltage exceeds a threshold and a current through the fuse is below the trip threshold current of the fuse.

Systems and methods for redundant circuit disconnection in electric vehicles are disclosed. Systems can include a resistive metallic fuse connected within an electrical circuit for a battery or otherwise, an inductor comprising a coil of at least one turn of wire about a longitudinal axis, and an AC power source configured to provide an alternating current across the inductor. The resistive metallic fuse may be disposed within the inductor along the longitudinal axis, and the AC power source may be configured to cause the inductor to induce within the resistive metallic fuse eddy currents of sufficient magnitude to melt or vaporize at least a portion of the resistive metallic fuse disposed therein.

Systems and methods for redundant circuit disconnection in electric vehicles are disclosed. Systems can include a resistive metallic fuse connected within an electrical circuit for a battery or otherwise, an inductor comprising a coil of at least one turn of wire about a longitudinal axis, and an AC power source configured to provide an alternating current across the inductor. The resistive metallic fuse may be disposed within the inductor along the longitudinal axis, and the AC power source may be configured to cause the inductor to induce within the resistive metallic fuse eddy currents of sufficient magnitude to melt or vaporize at least a portion of the resistive metallic fuse disposed therein.