primary winding

The high voltage primary windings are brought out to bushings on the top of the case.

To do this, the transmitter utilizes one or more primary windings in order to induce an even magnetic field above its surface.

Unfortunately, a substantial proportion of modern mains transformers have either twin primary windings, or a tapped winding.

Anyway, if you should encounter one of these transformers, the primary windings are connected in parallel, as shown in Fig. 2(b).

This capacitor and the coil's primary windings form an oscillating LC circuit.

From time to time I have encountered mains transformers which have twin 240 volt primary windings.

For a three phase transformer, the three primary windings are connected together and the three secondary windings are connected together.

Transformers providing three-phase secondary power, which are used for residential service in the European system, have three primary windings and are attached to all three primary phase wires.

These types combine two diphased primary windings in one of the stacks of sheets, as with the receiver, and two diphased secondary windings in the other.

Note that the same basic method of connection is used for transformers which have twin 120 volt primary windings when they are used with continental 120 volt mains supplies.

In 1876, Russian engineer Pavel Yablochkov invented a lighting system based on a set of induction coils where the primary windings were connected to a source of AC.

Independent primary windings allow 120 or 240V 50/60Hz operation, together with independent secondaries which may be connected for series, parallel or centre tap operation, giving a wide choice of voltage/current combinations.

In sections 6.2 and 6.3 it was established that time-dependent potential differences across the secondary and primary windings of a unity-coupled, lossless transformer are in the same ratio as the turns ratio between these windings.

The primary winding of the transformer was designed to operate on either 6.25 kV or 25 kV with voltage sensing equipment fitted to ensure the correct arrangement of primary windings for a given voltage.

The primary and secondary windings of the transformer have been interlinked as shown in the circuit diagram, such that the twin 120V primary windings are in series, making the transformer suitable for domestic 240V mains operation.

To gain the buck/boost feature, all that is required is two separate switches so that the AC input can be connected to one of the two primary taps, while the load is connected to the other, thus using the main transformer's primary windings as an autotransformer.

Terminal identifications (either alphanumeric such as H for primary windings, X, Y for secondary windings, or a colored spot or dot impressed in the case for one end of each winding, indicate the same instantaneous polarity and phase for all marked windings.

As part of his arc lighting patents, Yablochkov described a method of employing Michael Faraday's discover of induction to create a continuous current of higher voltage, where primary windings were connected to a source of alternating current and secondary windings could be connected to several electric "candles".