Telcon’s Current Transformers are used to measure or sense large alternating currents by scaling it to a smaller, safer measurable value. Current Transformers are used to transform the primary current to a proportional secondary value in terms of magnitude and phase. Our Current Transformers are manufactured from raw materials and are available in various sizes (shapes and windings – no of turns) that are used as an interface between high currents and applications where measuring and sensing is critical. The industry often refers to these as CT’s.
Telcon’s expertise is supporting CTs are in smaller product-based applications, and offer a variety of products with or without bus bars being added. Telcon do not manufacture large scale CTs used in outdoor applications such as power grid or substations. These types of products can be supplied through our partner network.
There are three basic types of current transformers: wound, toroidal and bar.
Wound Current Transformer – The transformers primary winding is physically connected in series with the conductor that carries the measured current flowing in the circuit. The magnitude of the secondary current is dependent on the turns ratio of the transformer.
Toroidal Current Transformer – These do not contain a primary winding. Instead, the line that carries the current flowing in the network is threaded through a window or hole in the toroidal transformer. Some current transformers have a “split core” which allows it to be opened, installed, and closed, without disconnecting the circuit to which they are attached.
Bar-type Current Transformer – This type of current transformer uses the actual cable or bus-bar of the main circuit as the primary winding, which is equivalent to a single turn. They are fully insulated from the high operating voltage of the system and are usually bolted to the current carrying device.
For more information or to receive a quote, email us at [email protected] or click on the link below to fill in the form. You can also call us on +44 (0)1293 528800 between 09.00 and 16.00 Monday to Friday UK time.
Current Transformers Gallery
