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Non-oriented electrical silicon steel (image made with magneto-optical sensor and polarizer microscope) Electrical steel made without special processing to control crystal orientation, non-oriented steel, usually has a silicon level of 2 to 3.5% and has similar magnetic properties in all directions, i.e., it is isotropic.
World War I Brodie helmet, made from Hadfield steel. Hadfield was born 28 November 1858 in Attercliffe, then still a village near Sheffield. [1] Hadfield's father, also named Robert Hadfield, owned Hadfield's Steel Foundry in Sheffield and in 1872 was the first manufacturer of steel castings in Britain. He declined to use patented technology ...
IEC 62057-1 Electrical energy meters – Test equipment, techniques and procedures – Part 1: Stationary meter test units (MTUs) IEC 62057-3 Electrical energy meters – Test equipment, techniques and procedures – Part 3: Automatic meter testing system (AMTS) IEC 62058 Electricity metering equipment (AC) – Acceptance inspection
An analogous property in electrical engineering and materials science, electric coercivity, is the ability of a ferroelectric material to withstand an external electric field without becoming depolarized. Ferromagnetic materials with high coercivity are called magnetically hard, and are used to make permanent magnets.
The International Standard for the measurement configuration and conditions are defined by the standard IEC 60404-2:2008 Magnetic materials - Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame [1] published by International Electrotechnical Commission.
Transmission tower in Toronto, ON Single-circuit three-phase transmission line Transmission towers on a hill field. Three-phase electric power systems are used for high voltage (66- or 69-kV and above) and extra-high voltage (110- or 115-kV and above; most often 138- or 230-kV and above in contemporary systems) AC transmission lines.
Aluminium oxide has high thermal conductivity but is an electrical insulator, so special techniques may be required to make good electrical connections. Ordinary Kanthal FeCrAl alloy has a melting point of 1,425 °C (2,597 °F). Special grades can be used as high as 1,500 °C (2,730 °F). [2]
An amorphous metal transformer (AMT) is a type of energy efficient transformer found on electric grids. [1] The magnetic core of this transformer is made with a ferromagnetic amorphous metal. The typical material is an alloy of iron with boron, silicon, and phosphorus in the form of thin (e.g. 25 μm) foils rapidly cooled from melt.