Relay protection is the discipline of designing schemes that detect faults, coordinate relays, and isolate equipment without outages. Protective relays and devices have been developed over 100 years ago to provide "lastline"of defense for the electrical systems. They are intended to quickly identify a fault and isolate it so the balance of the system continue to run under normal conditions.
Read More
IEC 61439 is a standard developed by the International Electrotechnical Commission (IEC) that covers design verification for low-voltage electrical products and assemblies. This document covers fundamentals, processes, thickness specifications, pros and cons, comparisons with silver/nickel plating, Laminated busbar-specific considerations, and tin whisker control. Laminated bus bar is an engineered component consisting of layers of fabricated copper separated by thin dielectric materials, laminated into a unified structure. Sizes and applications range from surface-mounted bus bars the size of a fingertip to multilayer bus bars that exceed 20 feet in length. While Silver Plating offers exceptional conductivity for low-voltage power systems, tin plating meets conductivity needs while reducing plating expenses, making it a more cost-effective choice. Compared to nickel, tin's softer finish flexes during thermal cycling to maintain tight metal contacts.
Read More
Abstract−To avoid undesirable disconnection of healthy wind generators (WGs) or a wind power plant, a WG protection relay should discriminate among faults, so that it can operate instantaneously for WG, connected feeder or connection bus faults, it can operate after a. For those not familiar with the different elements that form a WEP, commonly known as a Wind Farm, this report introduces a description of the different elements comprising a wind farm and how their unique characteristics may be considered to provide a proper design. First, the amplitude and attenuation characteristics of short circuit current in different types of wind turbines are analyzed, as well as the contributing factors to short-circuit current in wind farms. Protection of Wind Electric Plants is a report covering engineering considerations for the design of protection systems and present relay protection and coordination practices at wind electric plants. Abstract—A wind electric plant (WEP) is made of many wind turbine generators spread over a large area and includes many subsystems that need to be protected.
Read More
It includes 250µm fibers housed in gel-filled PBT (Polybutylene Terephthalate) loose tubes, which are wrapped around a phosphatized steel wire central strength member. This Specification covers the design requirements and performance standard for the supply of optical fibre cable in the industry. XCOM ensures a stable quality control system for our cable products through several programs including ISO 9001, ISO 14001 and OHS. Fiber optic cable GYTS, 2~144 bers central strength member (steel), jelly lled, ber contained loose tube and PP ller (if necessary) stranded, water blocking jelly, longitudinally covered by copolymer steel tape, PE outer sheath. These cables provide exceptional connectivity and data transmission in various applications. We supply single mode GYTS fiber optical cable and multimode GYTS fiber optic cable, fiber strand from 2 cores to 432 cores.
Read More
This work proposes a novel method of embedding FOSs using capillaries within solid structures and investigates fiber positions and orientation uncertainties within capillaries of different sizes and their influences on strain measurement accuracies. Embedding fiber optic sensors (FOSs) within parts for strain measurement is attracting widespread interest due to its great potential in the field of structural health monitoring (SHM). Therefore, the purpose of this effort is to bridge the gap between civil engineering and sensor engineering communities through an overview on the up-to-date technological advances in both sectors, with a special focus on textile reinforced concrete embedded with fiber optic sensors.
Read More+48 22 538 72 19
ul. Postępu 14, 02-676 Warszawa, Poland