Search results
Results from the WOW.Com Content Network
Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels. The most common usage of instrument transformers is to operate instruments or metering from high voltage or high current circuits, safely isolating secondary control circuitry from the high voltages or currents.
The flyback transformer circuit was invented as a means of controlling the horizontal movement of the electron beam in a cathode-ray tube (CRT). Unlike conventional transformers, a flyback transformer is not fed with a signal of the same waveshape as the intended output current.
Toroidal transformer. Donut-shaped toroidal transformers save space compared to E-I cores, and may reduce external magnetic field. These use a ring shaped core, copper windings wrapped around this ring (and thus threaded through the ring during winding), and tape for insulation.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
This net current flow will induce current in the secondary coil, which will cause the trip device to operate and de-energize the circuit - typically within 0.2 seconds. [2] The burden (load) impedance should not exceed the specified maximum value to avoid the secondary voltage exceeding the limits for the current transformer.
De Keulenaer, Hans; Chapman, David; Fassbinder, Stefan; McDermott, Mike (2001). The Scope for Energy Saving in the EU through the Use of Energy-Efficient Electricity Distribution Transformers (PDF). 16th International Conference and Exhibition on Electricity Distribution (CIRED 2001). Institution of Engineering and Technology. doi:10.1049/cp ...