Abstract: A camera system for monitoring an installation, in particular switchgear, has at least one camera, a display device, a switchover device and a power supply which, in an active state, supplies the camera with power via the switchover device. The switchover device is configured to transmit an image signal from the camera automatically to either the display device or to an interface to which a computer can be connected. There is also described a method for monitoring an installation, in particular switchgear, by way of the camera system.

Abstract: A camera is usable to observe a switched position of a switch contact of a switchgear apparatus. In an embodiment, the camera includes a light source to illuminate the switch contact, an image sensor, and a lens to focus light beams emanating from the switch contact onto the image sensor. In an embodiment, the camera additionally includes an elastic light protection cap to seal off a beam path, from the lens to the image sensor, from the light source in a lightproof manner.

Abstract: A camera is usable to observe a switched position of a switch contact of a switchgear apparatus. In an embodiment, the camera includes a light source to illuminate the switch contact, an image sensor, and a lens to focus light beams emanating from the switch contact onto the image sensor. In an embodiment, the camera additionally includes an elastic light protection cap to seal off a beam path, from the lens to the image sensor, from the light source in a lightproof manner.

Abstract: A camera system for monitoring an installation, in particular switchgear, has at least one camera, a display device, a switchover device and a power supply which, in an active state, supplies the camera with power via the switchover device. The switchover device is configured to transmit an image signal from the camera automatically to either the display device or to an interface to which a computer can be connected. There is also described a method for monitoring an installation, in particular switchgear, by way of the camera system.

Abstract: A back pressure valve for a fuel cell stack assembly is disclosed, wherein the valve includes a solenoid disposed thereon, an energization of the solenoid causing a generation of heat in a valve flap to facilitate a melting of ice that has formed in the valve.

Abstract: A wire is provided for producing a sliding contact, wherein at least an inner core of the wire consists of a copper-silver alloy. A sliding contact is also provided having at least one such wire, wherein a counter-contact is provided whose conductive surface has at least one of the wires touch against it. The spring force of the wire acting on the conductive surface of the counter-contact effects electrical contacting between the wire and the counter-contact and the counter-contact is mobile with respect to the wire, such that the surface of the wire slides over the counter-contact when the counter-contact moves. Components having the sliding contact are also provided, including a potentiometric sensor, potentiometer, sliding dolly regulator, position sensor, rotary switch, electrical motor, generator, wind turbine, slip ring system, actuator, or current collector.

Abstract: A back pressure valve for a fuel cell stack assembly is disclosed, wherein the valve includes a solenoid disposed thereon, an energization of the solenoid causing a generation of heat in a valve flap to facilitate a melting of ice that has formed in the valve.

Abstract: A device for turbocharging an internal combustion engine that includes, but is not limited to a compressor, which is situated in a fresh air line, a turbine, which is situated in an exhaust line and drives the compressor, and a catalytic converter, which is situated after the turbine in the intake line in the flow direction of the exhaust gas. Furthermore, the device includes, but is not limited to a cooling air line, which is diverted from the fresh air line between the compressor and the internal combustion engine, the cooling air line discharging into the exhaust line between the internal combustion engine and the catalytic converter and an expansion valve being connected in the cooling air line.

Abstract: An air humidifier is disclosed, the air humidifier including a caseless humidification module, wherein sealing properties of the humidification module are optimized.

Abstract: A fuel cell stack receiving oxidant into a compressor progressively pressurizing the oxidant from an inlet pressure to a discharge pressure where a fluid connection exists between oxidant effluent from the fuel cell stack and the progressively pressurized oxidant within the compressor at an intermediate pressure between the compressor inlet pressure and the compressor discharge pressure. A pressure regulator is provided for managing pressure of the cell oxidant effluent recycle flow to the compressor, and measurements are taken of compressor power consumption and/or compressor discharge temperature, humidity, and/or pressure to further control the regulator.

Abstract: Turbocompressors 1 comprise a turbine 10, a compressor 30, a rotatable shaft 20 connecting the turbine 10 and compressor 30 at opposite ends of the shaft 20, and an electric motor 50 coupled to the compressor 30. The turbine 10 comprises an inlet port 14 configured to receive an air feed, and a turbine wheel 12 connected to the shaft 20 and configured to rotate in response to a torque (?M) provided by the air feed. The rotation of the turbine wheel 12 is rotates the rotatable shaft 20 and a compressor wheel 32 of the compressor 30 connected thereto. The compressor 30 comprises an inlet port configured to receive and compress an air feed. The electric motor 50 may deliver a torque (?M) to the compressor wheel 32 in a direction opposite the direction of rotation of the rotatable shaft 20 in order to shut down the turbocompressor 1.

Abstract: A back pressure valve for a fuel cell stack assembly is disclosed, wherein the valve includes a solenoid disposed thereon, an energization of the solenoid causing a generation of heat in a valve flap to facilitate a melting of ice that has formed in the valve.

Abstract: Turbocompressors 1 comprise a turbine 10, a compressor 30, a rotatable shaft 20 connecting the turbine 10 and compressor 30 at opposite ends of the shaft 20, and an electric motor 50 coupled to the compressor 30. The turbine 10 comprises an inlet port 14 configured to receive an air feed, and a turbine wheel 12 connected to the shaft 20 and configured to rotate in response to a torque (?M) provided by the air feed. The rotation of the turbine wheel 12 is rotates the rotatable shaft 20 and a compressor wheel 32 of the compressor 30 connected thereto. The compressor 30 comprises an inlet port configured to receive and compress an air feed. The electric motor 50 may deliver a torque (?M) to the compressor wheel 32 in a direction opposite the direction of rotation of the rotatable shaft 20 in order to shut down the turbocompressor 1.

Abstract: An air humidifier is disclosed, the air humidifier including a caseless humidification module, wherein sealing properties of the humidification module are optimized.

Abstract: A fuel cell stack receiving oxidant into a compressor progressively pressurizing the oxidant from an inlet pressure to a discharge pressure where a fluid connection exists between oxidant effluent from the fuel cell stack and the progressively pressurized oxidant within the compressor at an intermediate pressure between the compressor inlet pressure and the compressor discharge pressure. A pressure regulator is provided for managing pressure of the cell oxidant effluent recycle flow to the compressor, and measurements are taken of compressor power consumption and/or compressor discharge temperature, humidity, and/or pressure to further control the regulator.