MANAGEMENT OF ELECTRICITY TO A COUNTY LIBRARY

The effects that manifest themselves at the scale of the Organization, in which energy is consumed, are related to the influence of its cost in financial balance. The importance of energy cost depends on the area of activity of the company.There is, however, a high potential for energy saving in most sectors of economic activity and in most institutions. Energy conservation is often a “painless” reduction in operating expenses. This does not imply employment for employees, and the investments required are often reduced and have minimal risk

Study on the End Winding Inductance of Three-Phase Windings in Two Layers

This work addresses the issue of the accuracy with which the stator end winding inductance of A.C. machines is determined in the design stage. Only two-layer windings having a shortened pitch are treated in this paper. The end winding inductance was calculated by determining the distribution of the magnetic field, performing numerical analyses based on finite elements method (FEM).The manner of how the inductances are determined using the analysis results is described in the paper. For validating the procedure, comparisons between FEM results and laboratory tests were performed in case of one of the studied machine. There is a very good correlation between the results. Then, a comparative FEM-Analytical study was carried out. Own program was used to design and build the models necessary in the study. Based on about 130 models, some important conclusions have been depicted

Concept for a multi-purpose academic gripper

In “concept for a new precise academic gripper” the mechanical aspects of the new gripper were presented [3]. In this paper, the idea is improved and expanded towards a clever control part. This paper mainly focuses on the functional ideas and the state of research concerning the imaging tasks. Experiment and intermediate results of the imaging process are discussed. Different approaches of skin colour detection in diverse colour spaces have been tested. Skin colour detection is investigated whether skin colour can be monitored to improve work safety in terms of functional safety. To enhance versatility, several ideas are combined to form a clever gripping device

ASPECTS REGARDING SF6 SWITCH DISCONNECTOR FRAMEWORK DESIGN

The complexity of the designing process of a switch disconnector framework comes from the almost impossible task to appreciate the discrepancy between the ideal and practical electric strength. Complicated geometries characterized by nonuniform fields are predesigned based on a set of analytical relations and corrected/optimized based on numerical methods and high voltage testing on prototypes. This paper suggest some approaches to minimize the effort and the steps required to achieve an acceptable stainless steel housing, in the insulators area, for a medium voltage SF6 switch disconnector. The results are based on simple analytical evaluation and finite element analysis in both 2D and 3D configurations

PRACTICAL APPLICATION WITH PLC IN MANIPULATION OF A ROBOTIC ARM

This paper presents the use of a robotic arm PLC Siemens in order not using CNC commands. This is done by programming the PLC ladder diagram language that makes movement on the three axes of the arm by means of stepper motors. Required command console PLC is built with the help of a touch screen HMI Weintek. In the user interface are introduced distances and displacement speeds on the three axes

Approaches for the planning and implementation of Industry 4.0

The continuous degree of automation in industry and the networking of individual components such as machines, robots, autonomous drive systems, control units etc. opens new possibilities for linking production and service or, integrating customers and business partners into value-added processes. In this technical revolution, machines should be able to decide independently and even contribute to developments. Before the implementation, planning should be carried out in the planning stage, where Industry 4.0 can be implemented, what should be achieved, how can corresponding plans be implemented, and what aspects of security, machine ethics, information ethics or work ethics must be considered. While answering these questions, it can be found out what resources of material and immaterial nature are needed and what are the advantages and disadvantages that should be expected

ENERGY EFFICIENCY CONTROLLED BY ARDUINO MODULES

To control and reduce energy consumption, it demands to install a network of sensors and using a dashboard to monitoring data acquisition from its. Energy monitoring is necessary to keep track of energy consumption according to the season, weather conditions and the flow of use of electrical appliances in the institution. The paper presents an approach for monitoring energy efficiency base on Arduino modules (smart-MAC) through a dashboard application. Dashboard WEB application has the advantage of leting the user a flexible indicator and chart widgets configuration for create an unlimited number of boards and devices connected to the same account. To realize an efficiency use of energy in public institution the date is analyze and on results can be take measurements for it

TRANSIENT REGIMES OF THE THREE-PHASE POWER TRANSFORMERS

The transient regimes of a three-phase power transformer will be studied in this paper. The transient currents in the windings will be determined both analytically and by finite elements method (FEM). The no load and short circuit regimes will be considered. The current dependence of the instantaneous phase voltage and of the initial current value will be highlighted, by FEM. In order to determine analytically the transient currents, for inductances the analytical and FEM values will be used. The inductances are determined with FEM through the simulation of experimental tests. With FEM, the transient currents will be determined using transient analysis. Finally, the FEM and analytical results will be compared and discussed