Why do transformers make noise?

1 Answer

Answer :

Transformers make noise based on it out put if an transformer outputs is 400v maximum than a 398v be apply to that transformer it also make a noise because of that 

Related questions

Description : 74)Power transformers are generally designed to have maximum efficiency around A. No load B. Half load C. Near full load D. 10% overload

Last Answer : C. Near full load

Description : [23] Transformers are rated in KVA instead of KW because A. load power factor is often not known B. KVA is fixed whereas KW depends on load power factor C. Total transformer loss depends on volt ampere D. It has become customary

Last Answer : C. Total transformer loss depends on volt ampere

Description : TRANSFORMERS MCQ

Last Answer : 101. A shell-type transformer has (a) high eddy current losses (b) reduced magnetic leakage (c) negligibly hysteresis losses (d) none of the above Ans: b 102. A transformer can have regulation closer to zero (a ... (6) much smaller (c) much higher (d) somewhat smaller (e) none of the above Ans: c

Description : What are the schedules of maintenance done on transformers?

Last Answer : Ans. Following are the schedules of maintenance on transformers. a. Daily maintenance. b. Monthly maintenance. c. Quarterly maintenance. d. Half yearly maintenance. e. Yearly maintenance. f. 5 Yearly maintenance.

Description : Why a transformer requires cooling. What are the methods of cooling transformers?

Last Answer : Ans. Transformers requires cooling as they get heated up due to various losses taking place in the transformer. (like iron of copper losses) Following are the methods of cooling of transformer. a. Natural ... . Forced oil air Natural Cooling (OFAN). d. Forced oil and forced Air cooling (OFAF).

Description : What are the loses in Transformers, Explain?

Last Answer : Ans. (1) Iron loses (2) Copper loses Iron Loss : Iron loss occurs in the transformers Iron core due to hysteresis and eddy currents taking place. They are almost fixed irrespective of ... losses in the primary and the secondary windings of the transformer which with the loading of transformer.

Description : Classify the transformers based on the construction, frequency and power.

Last Answer : Classification of Transformer Based On: i) Construction: Shell type, Core type, Berry type ii) Change in voltage level: Step-Up, Step-Down, iii) Number of phases: Single phase, Three phase iv) ... Control vi) Cooling: Self-cooled, Air-cooled, Forced-air cooled, Oil-cooled, Forced-oil cooled. 

Description : Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

Last Answer : Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

Description : Two transformers A and B having equal outputs and voltage ratios but unequal percentage impedances of 4 and 2 are operating in parallel. The transformer A will be overloaded by 

Last Answer : Two transformers A and B having equal outputs and voltage ratios but unequal percentage impedances of 4 and 2 are operating in parallel. The transformer A will be overloaded by 33%

Description : Core type transformers are popular in___________.  (A) High voltage applications (B) Low voltage applications (C) All of the above (D) None of the above

Last Answer : Core type transformers are popular in High voltage applications

Description : In a transmission line if booster transformers are to be used, preferred location will be  (A) At the receiving end (B) At the sending end (C) At the intermediate point (D) Anywhere in the line 

Last Answer : In a transmission line if booster transformers are to be used, preferred location will be At the intermediate point

Description : The friction losses in Real Transformers are :  (A) 0% (B) 5% (C) 25% (D) 50%

Last Answer : A

Description : Two 3-phase transformers cannot be operated in parallel, if their :  (A) kVAs are different (B) phase sequences are different (C) % impedances are different (D) voltage ratios are different

Last Answer : Two 3-phase transformers cannot be operated in parallel, if their : phase sequences are different

Description : An additional condition for parallel operation of three-phase transformers over single-phase transformers is that

Last Answer : An additional condition for parallel operation of three-phase transformers over single-phase transformers is that the transformers should belong to the same vector group

Description : Which of the following is the advantage of using CRGO steel in transformers? A) High magnetic flux density B) Low permeability C) Both A and B D) None of these

Last Answer : It definitely High Magnetic Flux Density since a crgo steel has always a more around 3% of silicon proportion among the remaining ferrite which make cold rolled grain oriented steel having high flux magnetic ... for more about the crgo core you can learn here https://nicoreindia.com/crgo-core/

Last Answer : Instrument transformers are potential transformers, current transformers.

Last Answer : Natural oil cooling is used for transformers up to a rating of 3000 kVA.

Description : If the percentage impedances of the two transformers working in parallel are different, then?

Last Answer : If the percentage impedances of the two transformers working in parallel are different, then parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load.

Last Answer : Distribution transformers are generally designed for maximum efficiency around 50% load.

Last Answer : Power transformers are generally designed to have maximum efficiency around near full-load.

Description : Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in?

Last Answer : Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in loading of the transformers not in proportion to their kVA ratings.

Last Answer : Short circuit test on transformers is conducted to determine copper losses.

Last Answer : Necessary conditions required to be satisfied in order to ensure successful parallel operation of single phase transformers:  1. Only transformers having the same phase displacement between primary and secondary ... . 7. The phase sequence must be followed strictly on HV and LV side connection.

Last Answer : Natural air cooling is generally restricted for transformers up to 1.5 MVA .

Description : Losses which occur in rotating electric machines and do not occur in transformers are?

Last Answer : Friction losses windage losses 

Description : The efficiency of two identical transformers under load conditions can be determined by?

Last Answer : The efficiency of two identical transformers under load conditions can be determined by back-to-back test.

Description : The efficiencies of transformers compared with that of electric motors of the same power are?

Last Answer : Transformers have high efficiency than the same ratted motors

Last Answer : Current transformers (CT) : Current transformer (CT) actually step down the high current to low current for the operation of relays. Current transformer is use for measurement of ... use for relay. This is about potential transformer.

Description : Why does a plastic bag make crunching sounds when we crush it? What energy is getting converted to noise here?

Last Answer : It's not molecular. It is more likely the stiffness of the material and its resistance to being folded. If you take a plastic cup and squeeze it in your hand, you will hear a cracking sound and it may ... and damage. If you want to induce change on a molecular level of a plastic, you can heat it.

Description : What causes Valley Oak trees to make noise?

Last Answer : All trees creak, that’s one of the reasons it’s so scary to go walking in a forest at night. When wood gets warm the liquid in the cells expand, and when they cool, they contract. This can cause sounds that can actually sound like talking.

Description : If you like to take a nap during the day, what noise is most likely to wake you up?

Last Answer : My husband watching TV or banging around in the kitchen.

Description : Do you ever become overwhelmed by too much noise?

Last Answer : answer:Yes. Look up Sensory Processing Disorder. It explains a lot in my life. I’m normal in most respects, but I can’t handle very loud noises, strong vibrations, cigarette smoke, or most perfumes. It’s not fun. http://www.sensory-processing-disorder.com/

Description : Would it freak you out if you regularly heard a noise that sounds like a squeaky hinge, even when you're home alone?

Last Answer : Could the squeak be a heating duct or hot water baseboard heat run expanding and contracting as the heat cycles on and off? Sometimes.they shift and come in contact with the floor.

Description : If your backyard is noisy because of a busy road a quarter mile away is there anything one can do to quiet the noise?

Last Answer : answer:Egg crate foam. It's good enough for soundproof rooms, so why not? Hell, I know someone who, on a tight budget yet in need of a way to muffle their music space, just put up a whole ... though. You need something to scatter/diffuse it, and that irregular egg crate shape is great for that.

Description : Is there anything I can do about construction noise in our subdivision?

Last Answer : You could try. I’m guessing you get to a clerk or other flunky and that’s it.

Description : Have you used silicone ear putty before? Was it effective at blocking out noise?

Last Answer : I have used them, when I was very young (had tubes in my ears, and had to keep them dry), but they were professionally made by my ear doctor. I remember them doing a decent job of ... , and making sounds somewhat muffled. I could still hear them, though. Have you tried noise cancelling headphones?

Description : What is this (possibly electrical) noise?

Last Answer : answer:You hear it in your bedroom, but that doesn't mean the sound is not coming from somewhere else. Do you have neighbors? Have you located a specific place where the sound comes from? I don't recognize ... be someone signalling in morse code: SOS. Help. Dit dit dit, dah dah dah, dit dit dit.

Description : What's the happiest noise you can think of?

Last Answer : Kitten purr.

Description : Why is my MacBook Pro making this noise?

Last Answer : Um. You recently got this Mac as a gift. and your hearing a strange noise.. Well first of all. If you got a brand new computer as a gift it shouldn't be making any noise. Other than when ... Apple on their website and tell them the problem. Your 1 year warranty that the company gives you will help.

Description : What is that high pitched screeching noise occasionaly heard in Virginia Square in Arlington VA?

Last Answer : answer:I'm guessing lawyers being questioned on their billable hours, but I haven't heard your noise, so I can't say for certain. Maybe if you can describe it in more detail, such as time of day, ... wide range. (You should have heard my sisters years ago when I would look at them in the car.)

Description : What animal is making this frigging noise?

Last Answer : Is this the sound? Western screech owl

Description : What is the noise called that a tiger makes -- lions roar, canaries sing, what do tigers do?

Last Answer : Tigers Roar too.

Description : What are the best noise blocking headphones or earbuds or... anything else?

Last Answer : Noise-canceling headphones will work best for the running & jumping, which generates rumbles with mostly low-frequency content. They can't cancel shouting & crying very well because (1) they don't ... to vocal frequencies. In any case, noise-canceling headphones won't stop the windows from rattling!

Description : Why do you think humans are so replusive and cringe to the noise of fingernails scratching on a chalkboard?

Last Answer : For me, it’s not really the sound, it’s the feeling that it makes. It’s like biting down on fabric. It’s an awful feeling. As for scratching a fork against a plate, that just sounds awful… By the way, I think you mean “repulsed”, though “repulsive” is funnier. :P

Description : OKAY! THAT'S IT! What IS THAT NOISE?

Last Answer : My MacBook makes that noise when I do something that the computer cannot register. I cannot think of a specific example right now. There is nothing wrong with my computer.

Description : Electrical interference noise in car speaker?

Last Answer : Take it to a car audio place. They can most likley install a noise filter.

Description : What are the bugs in my yard making this high pitched humming noise?

Last Answer : Is it probably a cicada.

Description : What makes that clinking noise in the trees at night?

Last Answer : Maybe cicadas? I’m not sure if they’re that far up north though. They’re everywhere down here in Texas and they sound like what you’re describing!

Description : Define the term electrical noise. List types of noises.

Last Answer : Electrical Noise:- It can be defined as undesirable electrical signals, which distort or interfere with an original (or desired) signal.  Types of noises:-