Q:hi, so i know at the distribution level transformers are used to step down the voltage to be supplied to the residential/commerial customers. I was just wondering though. what actually feeds the transformers and where are these feeds coming from?also, could anyone briefly explain what is inside an actual transformer such as (primary elbows, secondary, bus bars, etc)thanks in advance!!

Hi pal! A transformer is a device which converts electrical energy. just remember that. now we know energy is E VI.t right? Now a transformer has two ends. one is the primary winding and the other is the secondary winding. winding means wound wires ;ole am inductance wire. the two of them are connected by a metallic core through which magnetic flux flows linking the two windings. Since energy is constant Voltage of primary x Current in primary Voltage in secondary x Current is secondary Now, since the number of turns of the 2 winding are different, thus the flux linkages are different i.e. N x phi so induced emf by faraday's law is different. so if secondary number of turns is suppose 10 and primary is 1000 then if voltage in primary is 1000V secondary is 10V this is how it steps down. so the transformer is FED by a high or low voltage source via busbars. this is as briefly as i can explain without boring ya!! :)

Q:"A transformer ratio is 110/11, then it is" "A transformer ratio of 110 / 10.5, it is" "A transformer ratio of 121 / 10.5, it is"

For example, 10KV system, the transformer primary winding rated voltage of 10KV and 10,5KV, secondary winding rated voltage of 10.5 and 11KV. 110KV system, the transformer primary winding rated voltage of 110KV, secondary winding rated voltage of 121KV. 220KV system, the transformer primary winding rated voltage of 220KV, secondary winding rated voltage of 242KV. and many more. 110KV is a winding, that is, 110 variable 10.5KV course is the buck variable. Secondary winding for the 121KV, that is, 10.5 variable 121KV course, the pressure has changed.

Q:80 kilowatts of electrical appliances need much transformer?

80 kilowatts of electrical appliances need 100kVA transformer. Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.

Q:A 120 kVA, 7000/277 V (What does this rating mean) distribution transformer has the following resistances and reactances: Rp 5.5 ohms Xp 6.5 ohms Rs 0.007 ohms Xs 0.008 ohms Rc 55 kohms Xm 15 kohms The excitation branch impedance are given referred to the low voltage side of the transformer: a) What's the equivalent circuit of the transformer referred to the low voltage side b) What's the the per unit equivalent circuit c) Assume that this is supplying rated load at 277V and 0.89 lagging power factor, What is the transformer input

120 kVA, 7000/277 V (What does this rating mean) Primary voltage rating: 7000 V, secondary voltage rating: 277 V, rated load: 120 kVA It is unclear whether this is a single-phase or three-phase transformer. You probably need to assume it is single-phase. The equivalent circuit of a 3-phase transformer is analyzed as one of three single-phase transformers that could be connected to make the equivalent Y-Y three-phase transformer. The secondary voltage, 277 V, is the line to neutral voltage for a 480 V, wye distribution system. That is a USA standard system voltage. The primary would be 12,124 V L-L, 7000 V L-N. That would a reasonable primary distribution system voltage. Referring the circuit to the low side means changing the primary component values to the equivalent secondary values and moving the ideal transformer to the primary side of the circuit as shown below. To change the primary impedance values, multiply by (Sec V/Pri V)^2.

Q:I got this Toroidal Transformer out of a z-5500 speaker system. the amp fryed in the system.whell i got this Toroidal Transformer and i want to know if i put DC power on it will it put out DC Power??It says input 120VAC output 26.2VAC ORG. Wire 0V BLK Wire 26.2VAC YEL Wire 14.0VAC BLU Wire 0VAC BLK/BLU WireAnd i whant to know that can i do with this thing???Thinks

The transformer is used to drop the 120vac to around 26vac. Without the supporting components you will not get DC voltage. Now, you can bypass the tranformer if you have an adapter that puts out 30vdc or close to it and your speakers will work fine. Now, if the amp is built into the speakers, then it will not work.

Q:dear sircan you please tell me the different Between the indoorr and outdoor distributionn transformer 11kv in applications and designwith our best regards

Outdoor Transformer Indoor Transformer - Transformers that are designed for installing at outdoor are outdoor transformers and transformers designed for installing at indoor are indoor transformers.

Q:i heard that there is an electric transformer used in single phase electric furnace and other applications , its benefit is to get more balanced current load from the three phase system to feed a single phase load.i need to know how its can transform three phase supply into single phase supply, and if it can be used in reverse matter i.e can it deliver a three phase power from single phase supplythank you in advance

First off: No, a transformer cannot change Single to Three phase. However you can run single phase equipment on three phase power by simply using 2 of the 3 hot lines. Depending of the voltage requirements for your machine you may need to buy a buckboost transformer to get the voltage to the correct opperating voltage of your machine (ie. a 230 v three phase input will come out at about 208 when used as single phase). If you need a conversion from single to three phase, look into buying a Phase converter. Depending on where you get it, they can be as easy as 2 lines in 3 lines out. Installed in a matter of minutes. I also recommend staying away from what is called a static phase converter. They are machine specific so if you ever change or add on it wont work. Get a Rotary one. It works with everything. Hope that helped. Good luck.

Q:How can we figure out which side of transformer is primary which one is secondary by measuring resistance ? I know that the side where input or supply is provided called primary from where the output is collected is called secondary side in both step-up step down transformersAnd, how can we troubleshoot a bad or a good transformer by measuring its resistance on both sides i.e. primary side secondary side ?thanks

I was wondering the same thing myself today

Q:i need a 120VAC to 160VAC step-up transformer; like, not an already built converter, but a just bulk single transformer. where can i buy one?and don't say go look in OKorder, coz i've already looked and there isn't any

The dimensions of a transformer depend on the required current rating. In some circumstances, you could even use a transformer with a multi- tapped primary. By tapping it lower, you may find 160V between the neutral or common tap and a tap higher up the winding. It would be working as an autotransformer, which is not a particularly good form. I would question for what purpose you would need 160V., anyway? It seems a strange voltage to need.?

Q:I want to step down a 240Vpeak signal to 24. Anyone know where I can get a transformer to do this? Also does frequency have a dependence on a transformer? The signal I am looking at has around 55Khz frequency. Thanks for your help

You won't be able to find a transformer for that frequency, unless you are lucky. You will have to wind your own. Probably a ferrite core is best, depending on your power level, which you did not mention, and is an important design factor. If this is a very low power signal (you do use the word signal), perhaps a capacitive or resistive voltage divider will be enough. Or search for an audio signal transformer. .