Papers by Keyword: Fuse

Abstract: The integration of photovoltaic systems into energy grids has been very common in recent times since more renewable forms of energy are sought after. Reliability and safety are among the most essential concerns that have to be considered for the deployment and operation of such systems. There have been some very conspicuous failures of protective devices in recent installations, leading to huge damage to solar equipment and an estimation of millions of Naira in repair and maintenance costs. The said incidents further underscore the need for technical competency in PV system installations as well as good-quality protective component acquisition. This study examines the critical role of protective devices in photovoltaic (PV) systems, focusing on their impact on system reliability, operational safety, and financial implications. A survey of industry professionals revealed that the major causes of device failures are overvoltage and poor-quality devices. Similarly, Circuit Breakers and Surge Protectors top the list of devices affected by failures. Critical system shutdowns take up 50% of the resultant consequences of failures, deteriorated performance, and safety hazards. Surprisingly, 65% of those who responded reported financial losses due to the failures, estimated at 45% between N100,000 and N500,000, while 15% had losses above N500,000. The study recommends high-quality protective devices be installed, installation and maintenance be standardized, and predictive maintenance/remote monitoring technologies be adopted to improve reliability and early fault detection. The long-term performance of devices in varying environmental conditions and the economic benefit of using durable, high-quality components are to be focused on further for research. These findings also put forward actionable suggestions to better ensure the PV system resilience for all stakeholders, thereby reducing their financial risks and ensuring the continued growth of the solar energy infrastructure in a reliable manner.

Abstract: To the disadvantages of common engineering plastics materials, way of performance improvement, main features, application scope and the technical performance, through the insulating material, bearing cage and electrical parts of material analysis introduces how to select the suitable material according to the characteristics of engineering plastics. Put forward to strengthen the overall design and materials and applied research, strengthening the concept of integration design, choose the guiding role. It can form a number of technical advantages group project research, to further strengthen the foundation of the new materials and processing technology research to accelerate the development of a new generation of application technology of the composite material, ammunition product development for the future provide efficient and low cost of new materials and creating an overall planning, increase capital investment and to speed up the pace of new material application research on application of countermeasures.

Abstract: Thermal spray coatings have become one of the most potential for hard chrome replacement, particularly for wear and corrosion applications. In this study four types of hard coating materials were selected and thermally sprayed by suitable processes as the following designated codes (material/spray technique): Cr-Fe/HVOF, Cr-Ni/HVOF, WC-Ni/SF and Cr-Fe/AS. All of starting materials were characterized in order to create a correlation between spray materials and coating characteristics. SEM was employed for morphology and microstructure investigation. Particle size analysis was investigated by SEM and laser particle size analyzer. Coating characterization included surface roughness measurment by profilometer, porosity evaluation by image analysis and hardness test by Vicker microhardness tester. Microstructure of coatings was also revealed by SEM. Wear performance was evaluated by pin on disc test and dry sand rubber wheel abrasion test. Corrosion resistance was tested by potentiodynamic method. The results showed that particle size and morphology of starting powders were various depending on manufacturing method. Chemical compositions of starting materials showed great effect on coating properties and performance. Coatings deposited by HVOF and spray & fuse (SF) method showed typically dense and homogeneous structure than arc sprayed coating. WC-Ni/SF coating showed lowest abrasive wear rate compared to other thermally sprayed coatings. All Ni base coatings had significantly lower corrosion rates while Cr-Ni/HVOF coating had lowest corrosion rate. Although Cr-Ni/HVOF and WC-Ni/SF could be applicable for both wear and corrosion applications, for heat sensitive parts, Cr-Ni/HVOF coating could be a better alternative to spray and fuse.

Abstract: Face recognition belongs to the important content of the biometric identification, which is a important method in research of image processing and pattern recognition. It can effectively overcome the traditional authentication defects Through the facial recognition technology. At present, face recognition under ideal state research made some achievements, but the changes in light, shade, expression, posture changes the interference factors such as face recognition is still exist many problems. For this, put forward the integration of global and local features of face recognition research. Practice has proved that through the effective integration of global features and local characteristics, build based on global features and local features fusion face recognition system, can improve the recognition rate of face recognition, face recognition application benefit.

Abstract: This paper presents a study of melting current in the commercial glass tube fuses to determine the duration of melt, maximum melting current and maximum power consumption of the fuse in a blowing circuit. A microcontroller is used as a device to measure and collect the values of current, voltage, and power consumption. In the experiments, the glass tube fuses rated of 0.5 A, 1 A, 2 A, 3 A, 5 A, 10 A, 15 A, and 20 A were used. The experimental results show that the melting time were approximately 0.05 s, 0.07 s, 0.11 s, 0.13 s, 0.18 s, 0.20 s, 0.28 s, and 0.40 s; the maximum of melting current were approximately 0.66 A, 1.17 A, 3.81 A, 13.77 A, 20.80 A, 25.05 A, 26.66 A, and 29.96 A; the maximum of blowing voltage were approximately 12.25 V, 12.25 V, 12.30 V, 12.15 V, 12.10 V, 12.29 V, 12.10 V and 12.20 V; and the maximum of blowing power consumption were approximately 7.53 W, 14.22 W, 45.57 W, 158.49 W, 224.38 W, 242.21 W, 230.63 W and 283.68 W respectively.

Abstract: Based on the analysis of basic dielectric EAP deformation and generation principle of dielectric, introduce the dielectric EAP actuator depends on the circuit implementation drive action and according to the dielectric EAP material has performance electrified deformation output force for missile aerodynamic drag characteristics, analyzes the feasibility of the application of dielectric EAP in the fuse, and puts forward the dielectric EAP used in Missile Fuse quasi research methods and technical route to take.

Abstract: Currently, its problems are about feeding more and inserting less fuses at a time, needing triple cooperation of rotary pairs, locations, and low production efficiency. A new type of feed of fuses mechanism was designed, its automatic adjustment of the number of inserting fuses can come out by means of the transmission fit of the trapezoidal axis with the via holes. The axis is a quadrangular prism in the middle and circular cylinders on both sides and the holes are in the middle of the pulling roll wheel pieces. It greatly improves the production efficiency.

Abstract: fuse trip interlock line fixed plate and front plate reinforcing ribs interference problems often occur in assembly, analyzed the data by field measurement,, establish project objectives, quantitative targets, through causal analysis, cause analysis, find the reason, the main reason to find the improvement scheme, and finally establish control plan, monitor the production situation, in order to control the situation in production. According to the investigation on the interference problem of fuse trip interlock line in installation, detailed analysis of the process, the question gives effective solutions, and dynamic quality assurance measures, provided the reference method for solving this kind of problems.

Abstract: In the accelerated ageingtest of fuses, manual measurement was used to collect the temperature of fuse.By this testing method, the errors introduced by human were inevitable. In thispaper, an automatic temperature measuring type accelerated ageing test systemfor fuses was developed. So, the errors introduced by human were overcome.

Abstract: The Development of the computer has been from a single machine to the server, and then server clustering technology, and the emerging "cloud" network, which invariably show the network's role in the computer. Meanwhile, more and more high-end hardware trash or the users may be unbearable of high cost of servers, so the use of existing resources and integration of resources has become increasingly important. This paper will detail a virtual network file system, which based on Upnp (Universal Plug and Play) and FUSE (File system in Usese Space) in Linux operating system. In this study, users can share a computer terminal to collect and use that particular computer terminal on the network to all the resources users are interested in, provided that the shared computer terminals must be installed on a specific Upnp device. In this study, we have successfully implemented single-device-side and single-device-side multithread communication under the Linux or windows operating system.