Mell What happens if I dont use a transformer?
Without transformers there is no way to get really high voltages. Without high voltages, electric power would only be efficient if it used close to where it was generated.
Why do transformers need to be used?
A transformer is an electrical device that trades voltage for current in a circuit, while not affecting the total electrical power. Transformers can be used either to increase the voltage also known as stepping up the voltage, or they can decrease the voltage also known as stepping down the voltage.
Does a transformer use a lot of electricity?
It turns out that these transformers consume power whenever they are plugged into the wall, whether they are connected to a device or not. They also waste power when powering a device. The power consumption is not large — on the order of 1 to 5 watts per transformer.
What does a transformer act like with no load applied?
When there is no load the applied AC voltage will cause “magnetising current” to flow. This will cause some losses due to eddy current losses in the core and copper losses due to resistance in the winding (“I squared R losses” as power = Current^2 x Resistance).
Why does my transformer not work on DC supply?
At this stage, current (i) will increase to the dangerous level and stop changing. When there is no change in current (i), the induced voltage in the primary will be zero as di/dt = 0 which leads to short circuit the transformer winding with the appalled DC source.
What happens when a fault occurs in a transformer?
If a fault occurs between the two sets of current transformers, one or more of the currents (in a three-phase system) on the left-hand side will suddenly increase, while that on the right-hand side may decrease or increase with a direction reversal. In both instances, the total fault current will flow through the relay, causing it to operate.
What happens when your transformer exceeds the safe level?
When current exceeded the safe level, high power loss will occur as P = I2R. which will rise the temperature to the dangerous level and there may a chance of explosion of the transformer and transformer oil may catch fire as well.
How does alternating current work in a transformer?
An alternating current flowing through one coil of wire, the primary, induces a voltage in one or more other coils of wire, the secondary coils. It is the changing voltage of AC current that induces voltage in the other coils through the changing magnetic field. DC voltage such as from a battery or DC power supply will not work in a transformer.