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The actual welding current may be greater than can be supplied from you electric panel. Therefore, the primary side of the welder may be supplied with 240 Volts at 30 Amps as an example or 7200 watts. In the welder if this was transformed to 120 volts at 60 Amps you would have more current and less voltage but essentially the same wattage with some losses. Therefore, you have transformed the current capacity at the welder head.
What else can I help you with?
Why alternating current is use for electrical system?
The transmission of electrical energy requires very high voltages (for a given load, the higher the supply voltage, the lower the load current). To increase/reduce these voltages, you need transformers. Transformers are AC machines; they do not work with DC.
Are Transformers used in circuits with Direct Current?
No. Transformers are used in circuits with Alternating Current. Transformers work on the principle of a "changing" magnetic field inducing a current in a conductor, and you don't get that "changing" field with Direct Current.
How does a welding transformer work?
A welding transformer uses the alternating current supplied to the welding shop at a high voltage to produce the low voltage welding power
Does the battery method have any limitations on testing the transformers polarity?
yes its does the higher the current will blow out the transformers
List a following devices that use electromagnetism to work?
Electric motors Speakers MRI machines Transformers Microwaves Doorbells Generators
How does resistance welding machine work?
This welding machine is useful to melt the metal at the end points. It converts 120-240 volt AC electricity to welding voltage. Thanks Artech Welders
Why ac current is used in a transformer?
AC current or DC current can be used in transformers. A transformer is made of two coils of wire, the input coil induces a current into the output coil. Transformers change the voltage either up (step up transformer) or down (step down transformer). The amount of change in voltage is dependent solely on the number of windings in both coils in the transformer. DC transformers work exactly the same way AC transformers do.
Can instrument transformers be used to extend the range of a moving coil voltmeter?
Not directly, as MC instruments are direct-current instruments, whereas instrument transformers only work on a.c.
What is the difference between ac arc and dc arc welding?
Both are shielded metal welders but differ in the electricity they use. Ac welders can weld heavier metal while dc welders are better for thinner metals. Ac welders can weld magnetized metals. Dc welders can not. The arc in an ac welder is harder to control because of the pulsating current. Dc welders are more expensive. Some welding machines offer both options.
DC current is not used in transformer?
No. Transformers rely on the magnetic field changing direction to work, so DC can't be used.
Why do transformers work only work on an AC supply?
Transformers only work on ac supply because it principle is mutual induction. DC supply has constant magnitude whereas AC has alternating magnitude. so we can step up or step down current/voltage in transformer in ac only.
What are the parameters used in shielded metal arc welding?
Arc length, current (amperage,) travel speed, work angle, travel angle.
