HAVE THIS GENERATOR REPAIR? HOW BEGIN REVIEW OF DIAGNOSTIC?
By: Jaime Acuña J. STMEU.There are several important aspects to be taken into account in the revision of diagnosis of a rotating electric machine. But we must establish an assessment priority measure, the state or condition of the electrical insulation of windings in the first place. The accuracy and reliability of diagnosis depends of The manner or procedure used to determine this, as well as equipment used for data isolation Then we determine the capacity to deliver energy for which the generator was designed, the output voltages to be used, and determine the type of exciter that was used in the design. It is not mandatory replace the original excitation system by the same, since in some cases, but in most cases, these have already dissapeared and there are improved versions of the same.To determine the electrical connections of a generator which we have no data is essential to know the number of poles of the windings. Almost always this is done by calculating the speed of the prime mover in connection with the generator output frequency, which is called synchronous speed V = 120XF/PV = synchronous speed. F = Frequency of the network or output of the generator. P = Number of poles in the generator. Once we determine the number of poles, we performed the calculations and schemes to suit winding output voltage needed for the generator. These aspects in relation to the electrical system, are the most important, but the mechanical aspects such as bearing condition, the state of the rotor core, and the dynamic balance of rotating parts, makes the repair of a electrical equipment of this category should be performed by qualified personnel.
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