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7 Ways To Tell When A Transformer Is Bad

Posted on by Kurz Industrial Solutions

If you’re having problems with electricity, a bad transformer may be responsible. The transformer sends electrical energy between two circuits or more. Transformers have varying currents, which in turn creates a varying magnetic flux that produces an electromotive force around the core. Today, there are many different transformers on the market. Each one serves a different purpose. If you’re wondering whether or not yours is faulty, here are some good tips to find out.


Perform a Visual Inspectionelectricity transformer


Performing a visual inspection of your transformer is key. Sometimes, you’ll be able to see things right away that indicate a problem with the equipment itself. If you notice any bulges along the exterior, for instance, or if you see any burn marks, it’s a good indication that the equipment needs to be replaced. If you see visual damage, don’t even try to test it! Instead, call a professional to remove the old unit and install a new one that works. Overheating or a power surge can cause substantial damage to the unit. Those circumstances produce visual deformities and render the equipment useless.


Check the Schematic Circuit

Understanding how the equipment works ais critical when making repairs. The unit’s schematic layout shows precisely where all the wiring is located. Looking at a schematic, you can easily see how all parts of the circuit are connected. The schematic will be included either as part of the owner’s manual or available online depending on the manufacturer and the unit’s age.


Find the Input and Output

The inputs and outputs of energy flow into and from the transformer are essential to find. The electrical field that produces energy will be the point of energy flow into the unit. On the other end, the outputs are circuits that get power from the magnetic fields. They are connected to secondary connection points from the equipment.


Check the Voltage

Once you determine that the unit is safe and has electricity flowing into and out of its connection points, you’ll want to check the strength of the electricity. This helps you determine whether or not the unit is faulty. You can check the voltage by checking the top center tap. There are two top taps that you can look at. If there is power going to the unit, check for a bad connection from the power connection block to the unit itself.


Inspect the Meter

The meter reading on your unit can also indicate whether or not it is functioning properly, and if it is, to what degree. The unit should provide either 240 or 280 volts of AC current. This current should lie along the two outer wires near the transformer’s bottom. If you don’t see any voltage, the problem likely lies with the unit itself and it will have to be replaced.


Evaluate the Power

A bad transformer will have weak power or none at all. If there is power to the unit, it may not be faulty. However, if there is little or no power going to the unit, it may need replacement or repairs. A simple way to check the power is to turn the unit off and on again. Alternatively, you can continue moving back on the line to measure the voltage. Keep moving backward until you get a voltage reading.


No Voltage

If there’s no power, there may be no voltage at all. By checking the voltage points, you can quickly determine if voltage is the issue. If there is no voltage or weak voltage, the problem may have several root causes. One is the control. The control board can also fail. Either way, you’ll need to replace the faulty unit.


Keep in mind that you should only attempt transformer fixes if you have some electrical knowledge. Otherwise, it’s best to contact a professional with electrical knowledge!

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