What is a series winding on a power transformer?
What is a series winding on a power transformer?
(OP)
We are purchasing a 12/15/20 MVA transformer that is dual/dual (138/69 kv primary, 24.9/12.47 kv secondary).
The transformer had just be completed and the factory was doing the acceptance tests when they said they had some "high" readings on the "series" winding.
All the sales rep could tell me is that "due to the high currents" on a dual/dual, there is a series winding. I'm assuming it's some form of reactor coil.
Any idea what he's talking about?
The transformer had just be completed and the factory was doing the acceptance tests when they said they had some "high" readings on the "series" winding.
All the sales rep could tell me is that "due to the high currents" on a dual/dual, there is a series winding. I'm assuming it's some form of reactor coil.
Any idea what he's talking about?






RE: What is a series winding on a power transformer?
The enclose link is a typical representation of one of the three windings configuration
http://www.hammondmfg.com/par_serA.gif
RE: What is a series winding on a power transformer?
RE: What is a series winding on a power transformer?
By this I'm assuming it is independently wound from the main windings.
RE: What is a series winding on a power transformer?
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: What is a series winding on a power transformer?
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: What is a series winding on a power transformer?
20MVA at 12.47kV is over 900 amps. Waukesha Electric Systems, for example, might use an RV winding and their standard 600 amp UZD LTC assembly. Some others might just use a fully-rated LTC (such as a Reinhausen)and avoid the RV winding. As power transformers get larger, RV windings are used frequently as the commericially available LTC's are limited to 3000 amps or less.