Admin Table of Contents
What are the two sides of a transformer called?
Winding – Transformers have two windings, being the primary winding and the secondary winding. The primary winding is the coil that draws power from the source. The secondary winding is the coil that delivers the energy at the transformed or changed voltage to the load.
How many types of vector groups are there in Transformers?
Phase Displacement between HV and LV Windings:
| Group | O’clock | TC |
|---|---|---|
| Group II | 6 o’clock, 180° | delta/delta, star/star |
| Group III | 1 o’clock, -30° | star/delta, delta/star |
| Group IV | 11 o’clock, +30° | star/delta, delta/star |
| Minus indicates LV lagging HV, plus indicates LV leading HV |
What is Dyn11?
Dyn11 is vector group notation of tansformer.It means LV winding,which is star connected (written in small letters means LV side and vice versa)is 30 degrees lagging by HV winding which is delta connected.In India we go for +-30 deg connection of transformer.
What are the parts of a transformer?
There are three basic parts of a transformer:
- an iron core which serves as a magnetic conductor,
- a primary winding or coil of wire and.
- a secondary winding or coil of wire.
What is HV and LV side of transformer?
The test is conducted on the high-voltage (HV) side of the transformer where the low-voltage (LV) side or the secondary is short circuited. A wattmeter is connected to the primary. An ammeter is connected in series with the primary winding.
What is vector group Test of transformer?
A vector group is the International Electrotechnical Commission (IEC) method of categorizing the high voltage (HV) windings and low voltage (LV) winding configurations of three-phase transformers. The vector group designation indicates the windings configurations and the difference in phase angle between them.
What is Onan and ONAF in transformer?
ONAN means Oil Natural Air Natural (When the oil is circulated in oil fins without any forced measure, it is called oil natural and air on the fins goes by nature. ONAF means Oil Natural Air Forced (The oil will be circulated without any forced measure but the air will be blown through fans).
What is Dyn5 in transformer?
The Dyn5 and Dyn11 transformer have the same output voltages and phase sequence and the same neutral connection to the secondary star point. The main difference is that the output voltages relative to the neutral are all reversed. Connect one of each transformer to the same supply.
What is a 2 MVA transformer?
A 2000 kva transformer amps is a electrical device which can transfer electrical energy from one electrical circuit to one or more than one circuits. This 2 mva cast resin transformer is an electrical device that is known to be passive.
How many parts are there in transformer?
Films
| Film | U.S. release date | Director(s) |
|---|---|---|
| Transformers: Revenge of the Fallen | June 24, 2009 | Michael Bay |
| Transformers: Dark of the Moon | June 29, 2011 | |
| Transformers: Age of Extinction | June 27, 2014 | |
| Transformers: The Last Knight | June 21, 2017 |
What is difference between bushing and insulator?
In electric power, a bushing is a hollow electrical insulator that allows an electrical conductor to pass safely through a conducting barrier such as the case of a transformer or circuit breaker without making electrical contact with it.