What Is A Transformer Tap Changer?
A transformer tap changer is a mechanism that allows variable speed selection in discrete steps.
This is done by connecting to a series of access points, called taps, along the primary or secondary winding of the transformer.
By changing the transformation ratio, the output voltage of the transformer can be adjusted to the required level.
There are two main types of tap changers: on-load tap changers (NLTC) and on-load tap changers (OLTC).
Before adjusting the steering ratio, the
NLTC must be disconnected from power, while the OLTC can adjust the ratio during operation.
The
switches can be manual or automatic depending on the application and rotation factor change frequency.