why when we perform SCC of an alternator we always get a
straight line even when 125% rated current is flown?
Answer Posted / moody
nice question
we got astraight line becas when we make ashort circuit on
the armature winding so only alittle net mmf is produced
from the field and armature reaction so the field current
used not exceeding 20 % of the field current for rated
voltage and in the drawing os o.c.c this region is
astraight " non saturation"
draw the phasor diagram and u will see the answer by ur self
| Is This Answer Correct ? | 7 Yes | 4 No |
Post New Answer View All Answers
Are some heat transfer services more prone to tube vibration that others for a shell and tube exchanger?
What is the Import Procurement Cycle ? and what are the customization steps in SAP ?
Are there any special considerations to be taken into account for combustion ammonia?
How can one estimate how the friction factor changes in heat exchanger tubes with a change in temperature?
What is screen analysis?
Define octane number?
What are some common problems associated with bellow expansion joints?
What are the design considerations for a piping system for the transfer of slurries?
X is strong but has a very low density (1% of traditional earth materials.) and hence light weight. It is a recyclable material. The compression behaviour of X is strain rate dependent. Higher strain rates result in higher initial modulus and higher compression strength. It can also withstand unlimited number of cycling loading provided the repetitive loads are kept below 80% of the compressive strength. The internal structure of the material includes air-traps which make it poor heat conductor. X is non- biodegradable and chemically inert in both soil and water. Most acids and their water solutions do not attack it; however strong oxidizing acids do. Solvents which attack X include esters, ketones, ethers, aromatic and aliphatic hydrocarbons and their emulsions, among others. It does not support bacterial/fungal growth as well .It also has significant acoustic properties and effectively reduces the transmission of airborne sound. X is combustible and should not be exposed to open flame or other ignition sources. Combustion products are carbon monoxide, carbon dioxide, water and soot. Long-term exposure to sunlight causes yellowing and a slight embrittlement of the surface due to ultraviolet light. X is able to withstand the rigours of temperature cycling, assuring long-term performance.
Specific Heat of Bagasse at 50% moisture, 40% moisture and 25% moisture?
Define wet bulb globe temperature?
hi all i have doe cheical engg, but i have to go for iob po interview so can anybody suggest me abt the kind of qns that can be asked.
What are the greenhouse gases in earth's atmosphere?
Why is post-weld heat treatment sometimes necessary for welded vessels?
hi sir/madam i need placement paper of last years of DRDO in chemical sream...... send me the question paper as soon as possible on my email address praveen.zone@gmail.com