Transformers are probably the most used and overexploited electrical devices at a workplace, as they never run out of load to process or distribute. So as long as the electricity powers the machines at warehouses, industries, residential areas, and networking centers, transformers are expected to be at their best shape and do the needful. Overwork and poor maintenance are two of the most common reasons that result in transformer failure. Hence, while most of the transformers repairing jobs cannot be performed by regular technicians at a workplace, there are certain practices that can be supervised on a localized level and conducted with fairly easy steps to maintain the performance of a Filter machine available on rental basis. As expected, these tasks are increasingly tactful and require thorough sincerity. Hence, when one takes up the responsibility of repairing the transformer by himself/herself, the following tips must be remembered by him/her:
1. Physical Damages or Accessory Failure of Windings, Coils, Alarms, Controls
Dry type transformers are worst affected by the heat that is produced during operations of electricity transmission, as they do not contain appropriate liquid coolant content to stabilize its core. On the contrary, liquid transformers are also degraded by the extreme heat but their ill effect is produced after a considerable amount of time. In both of the transformer types, heat leads to certain damages to its physical parts. For instance, corrosion of connections, cracks, or breakages in the windings, loose iron, or chipping of coils, unresponsive controls, and alarms, etc. Thus, in order to repair each and any of these damages, technicians need to replace the older part with a new one. Re-plugging connections (using new relays or screws), changing windings, alarms, controls, and coils are advised. Naturally, these transformers repairingprocess must be taken over after the transformer is unplugged from the power supply and should be granted enough time to cool down.
2. Inadequate Electricity Output Despite No Physical Damages
Such cases are particularly common in liquid transformers, where the Power transformers India very crucial functions like facilitating conduction of electricity throughout the device’s body. Hence, before checking out for other possible causes, technicians must check the oil level in the oil cap that is placed under the silica breather. If the oil cap displays any sign of corrosion by moisture or reduced oil level beyond specified limits, then the transformers’ oil must be promptly replaced or refilled.
3. Insulation Failure
Of all the transformers repairing tasks, checking and recalibrating insulation systems is perhaps the most difficult and the most important. In dry type transformers, discolored copper and carbon tracking on insulation are clear signs of problems in the respective systems, and hence the replacement of degraded parts can lead to full recovery of the system. In wet-type transformers, insulation failure can be caused by the contamination of transformer oil, corrosion of windings, corona discharges, electric arcs, and overheating. The repair method is chosen according to the detected problems. Testing the gas accumulated in the transformer oil helps in projecting the possibilities of discharges in the windings, thereby suggesting the replacement of oil as well as windings simultaneously. While the change in the color of silica in the oil cap clearly demonstrates the degradation of insulation capacity from the oil’s end. Hence, it must be replaced immediately.
Transformers repairing is a very sensitive mechanical task that must be conducted with special prevention measures. A complete shutdown of the transformer’s local area is the foremost step that any technician needs to take to ensure his/her safety. Considering the effective dangers of the process, it is advised for industries to maintain their transformers in a clean and healthy condition at all times and consult professional help regularly.