摘要:
There is disclosed a protection system for a power distribution system. The system has a processor, a breaker; a network coupled to the processor, a first module coupled to the network and the breaker, a second module coupled to the network, and an algorithm. The algorithm monitors for a permission to trip request. If a plurality of permission to trip requests are received during a given time period, the algorithm issues a permission granted command to the first module and a hold command to the second module.
摘要:
A method and apparatus is disclosed for providing protection against arc flash during maintenance on a low voltage power circuit including a circuit breaker having a specified trip function for responding to a fault is provided. The specified trip function is overridden with a maintenance trip function that results in reduced arc energy in the fault during a trip over arc energy during a trip with the specified trip function. The specified trip function is restored following maintenance.
摘要:
A high accuracy wireless sensing platform assembly comprising a sensor subassembly that is configured to obtain measurement data from a device in response to a measurand; a data transceiver assembly that is configured to communicate with an antenna assembly; a parameter coder, in communication with the sensor subassembly, that is configured to control the data transceiver assembly and/or the sensor subassembly, based on the measurement data; and a resonant circuit that is formed by the data transceiver, the sensor subassembly, and/or the parameter coder. Embodiments are capable of provide robust performance and high accuracy in harsh (e.g., hot environments). The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要:
A strain sensor comprises a transmitting element; a receiving element wirelessly coupled to the transmitting element; and a modulating element located on a rotating component, wherein the modulating element modulates the wireless coupling between the transmitting element and the receiving element, wherein the modulation of the wireless coupling is indicative of strain on the rotating component. A method of detecting strain in a rotating component of a rotary machine comprises wirelessly coupling a transmitting element and a receiving element; modulating the coupling with a modulating element located on the rotating component; and calculating the strain in the rotating component based on the modulation of the coupling.
摘要:
There is disclosed a protection system for a power distribution system. The system has a processor, a breaker; a network coupled to the processor, a first module coupled to the network and the breaker, a second module coupled to the network, and an algorithm. The algorithm monitors for a permission to trip request. If a plurality of permission to trip requests are received during a given time period, the algorithm issues a permission granted command to the first module and a hold command to the second module.
摘要:
A system and method for controlling a tunneling current between a first element and a second element of a micro-electro-mechanical system (MEMS) sensor. The system includes a tunneling current excitation source for providing a tunneling current between the elements and a tunneling current monitor for monitoring a change in the tunneling current responsive to movement of at least one element. The system also includes a positioner for positioning at least one of the elements and a controller in communication with the tunneling current monitor for controlling the positioner to position at least one of the elements at a first spacing between the elements for configuring the system in a referencing mode; and to position the elements at a second spacing for configuring the system in a sensing mode, whereby the system is calibrated with respect to the referencing mode.
摘要:
A method for synchronizing a plurality of processors within a computer system is provided. The computer system includes a plurality of processors that are each communicatively coupled to a respective network wherein each network is independent of each other network. The method includes receiving a plurality of input signals at a first rate from at least one source, transmitting the input signals to a reference object, and transforming the input signal to a known temporal reference. The apparatus is configured to receive a plurality of input signals at a first rate from at least one source, transmit the input signals to a reference object, and transform the input signal to a known temporal reference.
摘要:
A method for communicating information bundled in digital message packets via a digital network communication system is provided. The digital network communication system a sample source and each packet includes a header and a communication payload area. The method includes sampling the source at a first sample rate, selecting at least one decimation of the samples based on at least one of a plurality of algorithmic data rates and a channel bandwidth, determining a packet rate based on a plurality of algorithmic latency requirements, and transmitting the digital message packet containing decimated data on the digital network.
摘要:
A data sample and transmission module for a power distribution system is provided. The module has a microprocessor and a network interface. The microprocessor samples first signals indicative of a condition of power in the power distribution system. The network interface places the microprocessor in communication with a data network. The microprocessor samples the first signals based in part upon a synchronization signal transmitted on the data network.
摘要:
A protection system for a power distribution system is provided. The protection system includes a central computer, a plurality of data modules, and a data network. The data modules are each in communication with a different circuit breaker of the power distribution system. The data network communicates between the central computer and the plurality of data modules. The central computer sends an instruction to the plurality of data modules over the data network to aid in synchronization of sampling of a power condition at the plurality of data modules.