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Checking the windings on a transformer What should be the Ohms reading be This a 120vac to 10000 vac step up transformer.?
Wiki User
∙ 15y ago
Don't check transformer windings with an ohmmeter.
All you can do is determine if there's a break in the wiring. If it's reading as "open", then you know that the transformer is broken. It is not repairable without a considerable effort.
I'm curious as to how you obtained that transformer. It's quite dangerous and you shouldn't play with it unless you know what you're doing. You are likely to be killed if you try to power it up. DO NOT try to use this in a prank. There are lethal consequences.
Wiki User
∙ 15y ago
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What is the typical voltage of a control transformer for a three phase 480 volt starter?
Most 3 Phase 480V Starters are controlled by 120VAC. This is because the coils on the contactors (starters) are 120VAC. Just ensure the voltage matches the coil.
What does 120VUC stand for?
120VUC means 120VAC/DC
What is a switching power adapter?
A power adapter Typically is an item that converts a 120VAC power signal into a much safer and lower DC signal that can range anywhere from 2 volts to 30 volts. Inside its guts, There is most likely a transformer, resistors, rectifiers, and Chips that control the current. In case you do not understand,let me break it down: 120VAC enters into the adapter. it enters into a step-down transformer. this lower current enters a series of rectifiers that convert AC current into a safer and cleaner DC current. This DC current enters a few resistors along the way. Finally, this Much lower, cleaner, and safer current is transported out some wiring and to your laptop or other portable electronic.
What does 120 vac mean?
v = volts a = alternating c = current vac is what the lights and appliances in your house use. Your TV uses 120VAC. 120vac is the accepted standard of electric current commonly used through out the U>S>. Vac speaks of ac or alternating current voltage.
What are tv-5 relay contacts?
This explanation was found on a OMRON newsletter: Typically, a relay being tested for UL TV Rating sees an Inrush Load 10 times that of steady state current at 120VAC. For example, a relay receiving TV-3 Rating sees approx. 30A Inrush for a very short duration at 120VAC and settles to a steady state current of 3A, 120VAC before cycling off. Relays must operate successfully for 25,000 cycles of TV Load Testing to receive a UL TV Rating.
How do you determine transformer turns ratio if the supply source and load is given?
Transformer turns ratio is the ratio of voltages between two windings. For instance, a 24VAC control transformer that runs on 120VAC will have a turns ratio about 5 to 1.
How do you convert 120VAC 60Hz to 208 230 1 Phase?
you need a step up transformer
What is the typical voltage of a control transformer for a three phase 480 volt starter?
Most 3 Phase 480V Starters are controlled by 120VAC. This is because the coils on the contactors (starters) are 120VAC. Just ensure the voltage matches the coil.
Can you use a 480VAC step down transformer and apply 120VAC to the primary?
In theory, you can. If you have a power transformer rated at 480 primary side and the secondary at say 120VAC, then the ratio is 4:1. Meaning that there are four times the number of turns on the primary side as to the secondary. So, if you were to power the primary side with 120VAC as opposed to 480VAC you would expect to see a 1/4 reduction in voltage output on the secondary, or 30VAC. The current would be dependant on the cross section of the secondary conductor and core construction. As current is increased thru the load (as in resistance welding) for example, you would expect voltage to decrease or lag, a larger Industrial sized transformer is able to compensate for this lag in voltage better than a compact household power transformer.
Can you use a step down transformer as a step up transformer by reversing the primary voltage as a secondary voltage?
If the transformer has two separate windings, then, YES a step-down can be used as a step-up, and vice-versa.It is more correct to say you are reversing the high and low sides.By definition Primary is the "IN" side and Secondary is the "OUT" side.The Primary could be the high voltage side if it is a step-down,or it could be the low voltage side, if it is a step-up.Design ConsiderationsCare must be taken when reversing the operation of a step-down transformer to insure that it does not exceed the ratings of the transformer. For example, let's say we have a 12 VA step-down transformer that takes 120Vac in and is rated to provide 12V at 1 amp at the secondary. If we were to reverse it and apply 12Vac to the new primary (the old secondary), we would have 120Vac at the new secondary, but to keep within the original ratings it could only be loaded to 0.1A @ 120Vac.As long as you treat the output rating of the step-down transformer as the input rating as a step-up transformer, and don't try to draw current beyond what would normally have been applied to the high voltage primary, you should be fine. Potentially one could push up the voltage on such a transformer beyond what its stated application specified, while making sure not to exceed the power rating of the transformer and not exceeding the breakdown voltage of the transformer's insulation, for example driving the above transformer at 24V to get 0.05A @ 240Vac. It is important to realize though that the rated input voltage for a step-down transformer will likely not be a safe input voltage if you use it as a step-up transformer - for example, applying 120V to the above transformer with the windings reversed would generate 1.2KV!One important point to remember when reversing a three-phase transformer to a step-up is what kind of windings it has. Most three-phase Transformers use a "delta" configuration on the primary side. This means that there are three "hot wires" and a ground, but not a neutral. (The white wire in a circuit). On the secondary side, transformers are usually wired up in a "Wye" (sometimes called a "star" configuration. Doing this allows the transformer to create a Neutral connection. If a step-down transformer is reversed to make it a step-up, the high (output) side will not have a Neutral connection. If one is not needed, say for a three-phase welding machine, this would not be a probem. However, if a Neutral IS needed ,say for lighting, reversing this transformer would not work. In this case, a listed step-up transformer will be needed. One final thing, if a step-down transformer is used as a step-up, a Neutral wire is not required to be connected to the input side.
What AC adapter do you need for your Trek 2200 recumbent stationary bike?
UPEXX Plug In Class 2 Transformer Model No: AM-61000 Input: 120VAC 60Hz 15W Output: 6VDC 1000mA
How many amps will a 2kVA transformer at 120 volts put out?
The 220 Volt secondary in a single phase transformer rated 2kVA, should be able to deliver about 2000/220 or 9.1 Amperes, assuming unity power factor.
Is the power supply for a Digitech whammy II 9v or 12v I need the specs for the power supply?
whammy 2 specs. ps750 class 2 transformer Ac-Ac power supply input: 120vac 60Hz 12w output 9v AC 780mA
What does 120VUC stand for?
120VUC means 120VAC/DC
What problems did Nikola Tesla solve when he invented the Tesla coil?
A Tesla coil is a type of resonant transformer circuit invented by Nikola Tesla around 1891. The Tesla coil is one of Nikola Tesla's most famous inventions. It is essentially a high-frequency air-core transformer. It takes the output from a 120vAC to several kilovolt transformer & driver circuit and steps it up to an extremely high voltage. He did not have any problems making his coil wich is the basis of wireless communituy today.
What plug do you need for canada and america?
3 prong 120vac
What charger should be used for a versalite 2.0 million candle power spotlite?
SHUEN SHEN ELECTRONICAS AC ADAPTOR CLASS 2 TRANSFORMER MODEL NO. SS120-0108-1DA LISTED E219834 57WJ INPUT: 120VAC 60Hz 20W OUTPUT: 13.5VDC 0.8A MADE IN CHINA
