Assess For Transformer Winding Deformation with the Doble M4110 Leakage Reactance Module

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Leakage reactance is caused by the leakage inductance of the transformer windings. The inductance appears as if it is in series with the primary and the secondary windings. This inductance has a reactance to the 60 Hertz line frequency which causes a voltage drop across it. This reduces its ability to effectively maintain the secondary output. 


It is important to regularly assess your transformer’s condition to ensure continuous service. Constant vibration, electrical stress and normal wear can cause changes in your transformer’s winding structure. This introduces power losses and the transformer may eventually fail if not addressed. If you are thinking of upgrading your 
electrical test equipment, you might want to check out the Doble M4110 leakage reactance module. This leakage reactance tester lets you measure inductance from 250 microHenry to 1.8 Henry and leakage reactance from 0.1 to 700 Ohms. It can also be used in conjunction with the Doble M4100 power factor tester for thorough transformer diagnostics.

The Doble M4110 is available for lease from Protec Equipment Resources. If you also need other electrical test equipment, you can browse our inventory for available tools. Contact us today for a complete list of available tools in stock.