Interested to Buy Any Domain ? << Click Here >> for more details...
What will happen if DC supply is given on the primary of a
transformer?
- 6 Answers
- 9926 Views
- I also Faced
- E-Mail Answers
Answer Posted / sunil panchal
A transformer's primary winding presents two forms of opposition to current flow. The first is resistance, which is dependent upon the length, cross-sectional area, and resistivity of the wound conductor. The second is reactance, which depends upon the inductance of the winding and the frequency of the supply. Resistance opposes both AC and DC currents, while reactance opposes only AC current. In the case of a transformer's windings, the resistance is relatively low while the reactance is very high. When an AC voltage is applied, the reactance is sufficiently high to limit the value of AC current flowing through the winding. However, the resistance is so low that a large current would flow if an equivalent DC voltage was applied instead. This current would likely overheat the winding's insulation, resulting in its breakdown, causing a short circuit(s) which could severely damage the transformer.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
Do you need any help with FEWA Electrical Supervisor exams?
What is the working mechanism of OLTC in Power Transformers????
Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss
how to test power transformer.YNd11
Tell me all plants load factors i.e which plant operating on which load?
how you taken aotitude test
what is relation between ct and pt ratio with multiplication factor of a energy meter? is there any other factor on which multification factor depend?
How does an induction motor start?
what is the differences between microprocessor and general purpose computer
What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )
draw the block diagram of fire alarm?
What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?
how we can calcultae the short circuit level for bus bar
Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.
