BK Transformer Variable Voltage Power supply
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 500 unit/month
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Products can be customized according to customer requirements!
Applicable scope: suitable for 50Hz ~ 60Hz AC circuit, widely used in machine tools and mechanical equipment, such as driving, marine, wind power, photovoltaic power generation, testing machine, etc., general electric control power, local lighting and light power supply.
With good performance, reliable operation, low energy consumption, small size, wiring safety, applicability, etc., can work under the rated load, is a kind of ideal variable power supply.
Company have 21 years of business history, set research and development, production and sales as one of professional transformer manufacturing enterprises, also is transformer industry of Shandong Province CQC certification (the original Great Wall certification system, certification time longest enterprises (14 years), mainly produce and sell all kinds of transformer products, including: (transformer Division) three-phase dry type transformer, intelligent three-phase servo transformers, BK\JBK1\JBK3\JBK5 control transformer, toroidal transformer, (small transformer Division) pin, potting type, lead type power transformer series products. (high-frequency transformer Division) EE series, EFD series, PQ series, filter, I-inductor, loop inductance etc..
We are able to supply various types of terminal blocks according to clients' requirement,Please contact us so we can offer you the best quality,competitive price and timely delivery.
- Q: 1. What does a transformer actually trasnform?2.What does a step-ip transformer step up?3. In a transformer, how does the power input to the primary coil compare with the power output of the secondary coil?
- It transforms voltage and current from the values that exist at the primary to the values that exist at the secondary. 2. It steps up voltage. 3. Ideally, the input and output power would be the same, that is the product of voltage and current would be the same even though the voltages and currents are different. I practical transformers there is resistance in the wire and energy loss in the core so that the output power is slightly less than the input power. The difference appears as heat in the transformer.
- 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: How many transformers are used in a hundred households?
- In this case, in accordance with the high-end community to consider, hundreds of people, about 30x100 = 3000kW capacity, should choose 3150kVA transformer; mid-range community, hundreds of people, should choose 1600kVA transformer; ordinary community, hundreds of people, should choose 800kVA transformer.
- Q: I have a homemade transformer that steps down 120 VAC (outlet) to 42 VAC. But no matter the resistance I place on the secondary, the primary always overheats!
- Any transformer has to have enough inductance to limit the idle current to a small value when the secondary is not loaded. How much inductance does your transformer primary have? The idle current should not be more than a few % of the max current. If you really have too little inductance (not enough turns), the core will saturate and loose impedance causing a huge current. My guess is that you used too few turns (both primary and secondary) and your idle current is way too high. Ironically that means that you need to use a smaller wire guage so that you can fit several times as many turns.
- Q: Can someone tell me what happened to the primes in transformers. I know Sentinel,Optimus and the fallen but what happened to the others ?
- Depends on the continuity. Traditionally, there were not seven, but thirteen original Primes. Neither Optimus or Sentinel were one of the originals, whether you want to say that there are thirteen or seven. Prime is simply a title given to the leaders of the Autobots, passed down from the original transformers. Since you said seven, I'm assuming you meant movie continuity. In that case, Megatronus Prime, later to be known as The Fallen betrayed the Primes' laws of peace, hence his name. The other six used their physical forms to create a vault in which to hide the Matrix of Leadership from The Fallen. The lore from other continuities is much more interesting however. The fate of those versions of the original Primes range from death, to splitting into smaller transformers and scattering across the galaxy, to living in their own pocket dimension in peace, or to chronicling the history of Cybertron, albeit with their true identity hidden.
- Q: How to measure check the good transformer ?kindly if anyone might upload the video for me . in this regarddo we have to take it out of the board ? (isolate from other components) .what to check . what should be the values ?when checking , supply should keep on or not ?any website that explain these things and upload the videos in these kind of matters . I want to learn the repairing and maintenance of electronic electrical devices instruments of daily use ?thanksGOD BLESS YOU ALL
- A quick-and-dirty check is to measure the resistance of the windings. There is no correct value because every transformer is different. For a mains step-down transformer normally the primary windings will be 50 ohms and the secondaries will be a few ohms. If there are double windings (like 0-115 0-115 on the primaries) then both windings should have a similar resistance. This is not a guarantee of a good transformer because it will not detect shorted turns. The only way to detect that is to take the transformer out, power it and measure the output voltages.
- Q: i have read different forums explaining what really is an isolation transformer but unfortunately i am having trouble on grasping the main idea? please help, why do they say that isolation transformer can help a person being electrocuted even if he touches one of the secondary terminals??? how is that??? thank you
- how does isolation transformer prevent a person from being electrocuted when touched the secondary? There are two common ways to get electrocuted by line powered equipment. Using an isolation transformer eliminates one of those ways. To get electrocuted electric current has to flow across your body, typically your heart. If you connect each of your hands to the output leads of an isolation transformer, you still get electrocuted. But there is another way to get electrocuted using line powered equipment. One side of the electric outlet is tied to earth ground, so if you touch something connected to the hot side of the wiring and have something else (like your other hand) connected to something that is grounded (like plumbing or a grounded appliance) you get electrocuted. The output of an isolation transformer floats the output in relation to earth ground, so if you touch some part of the transformer's output very little current will flow through you even if you are standing in water. You may wonder why I said very little current instead of zero current. The reason is that we live in an imperfect world where the insulation in the transformer may not be perfect and your body has a tiny bit of capacitance. For most purposes this doesn't matter but if you are dealing with medical equipment with electrodes attached near the heart, this sort of thing has to be addressed. A GFI outlet works in a somewhat related way. It compares the electric current in the hot and neutral lines in the socket. If these currents don't match, the assumption is that something is shorting the hot side to ground (maybe through you!) and cuts the power.
- Q: If you have two 12 volt transformers and if we connect their hot wires together does the voltage become 24 or 12 volts?
- There is actually a phasing to the transformer windings. If you connect them in series with the phases adding (both hit + 12 at the same instant) you get 24 volts out. If you connect with the phasing wrong (one hits +12 while the other hits -12) and put them in series the output will be zero volts (and they might overheat). If you connect them in parallel with the right phasing you will get 12 volts and the amperage will add to give you the sum of their amperage. If you connect in parallel with the phasing wrong you will get zero output voltage (and the danger of overheating). If the transformers do not make their phasing clear put a voltmeter on the output and briefly turn on the primary while seeing if you get zero or the voltage you want. If the phasing is wring swap the wires of one transformer around and check with the meter again.
- Q: even though the output voltage of a transformer can be much larger than the input voltage, the power output is nearly the same as the power input.Determine the relationship between the input and output current and the number of turns in the input and output coils.help!!!!!!!!thank you
- Lots of on-line sources to develop transformers based on size of wire, turns, amperage, flux based on the transformers materials. Theory indicates a 1/1 relationship between primary and secondary. Practical uses the properties of the materials/the current and voltage constraints of voltage- breakthrough and the Volt-Amperage capacity of the transformer.
- Q: A 2300/230 V step down transformer is rated at 70 kVA and 60 Hz. Its windings have the following resistances and inductances : Rp 0.093 ohms, Xp0.280 ohms, Rs 0.00093 ohms and Xs 0.00280 ohms. The transformer's rated current at the secondary is 3261 A. Assume that a10 from 2300/230 V and calculate the no load voltage for unity 0.7 lagging and 0.7 leading power factor.
- You question does not make sense. First issue: You want to calculate the no load voltage? At the secondary? But you specify a power factor? The only possible interpretation that can be drawn from a specification of power factor is that the transformer is under load. Second issue: You specific primary and secondary winding resistance and inductance. The problem is to calculate open circuit (no load) secondary voltage. But the specification says nothing about the core. If the transformer is open circuited, there is no secondary current, and therefore no voltage drop in the secondary winding resistance and reactance. And the specification says nothing about the core, the one must presume that there is no core loss. In the absence of core loss, and at no load, then there is no primary current, and therefore no voltage drop in the primary winding resistance and reactance. Third issue: what do you mean by a 10?
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BK Transformer Variable Voltage Power supply
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 500 unit/month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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