Electrical distribution networks frequently employ current transformers (CTs) for metering, protection, and measurement purposes. In order to generate an alternating current in the secondary winding that is directly proportionate to the current in the primary conductor, these are straightforward devices.
A toroidal CT is the most typical type of CT. The major current conductor of a toroidal CT runs through the centre core, which is a defining feature of these devices. Since toroidal CTs are always wired in series, the term “series transformer” is frequently used to describe them.
A CT can be built easily. The primary conductor is conducted through the centre of the hollow electrical steel core, which is surrounded by secondary windings of copper magnet wire. The primary conductor’s magnetic flux will be captured by the core and cause a secondary winding current that is proportionate to the number of secondary windings. CTs come in a variety of configurations, but they all have the same fundamental design.
Standard secondary output ratings for CTs are commonly 1 or 5 amps. Simply put, a CT ratio is the secondary current divided by the primary current, where the secondary might be either 1 or 5 amps. The primary current is 20 times larger than the secondary current when the CT is 100/5. 5 amps will flow into the secondary winding when the primary wire is carrying 100 amps.
The secondary current can be significantly less than the primary current by increasing the quantity of secondary windings. The secondary current is proportionally decreased as the number of turn’s increases. In a CT, the relationship between the secondary winding’s number of turns and current is inversely proportional. For instance, a CT with a 100/5 ratio has 20 turns while one with a 100/1 ratio has 100. The secondary current output is decreased when the turns are increased.
If you looking for Current Transformers for residential or commercial purposes, then reach out to us. Macroplast Industries is one of the well-known and reputed company among Current Transformers Manufacturers in India who offer their product at very reasonable prices.
