In a three-phase system, multiple transformers can be operated in parallel to increase capacity or provide redundancy. The parallel operation of transformers can be achieved in different ways depending on the specific requirements of the application. Here are two common methods of parallel operation for three-phase transformers:

1. Parallel Operation: In parallel operation, the high-voltage windings of multiple transformers are connected in parallel to receive the same high-voltage power source. Similarly, the low-voltage windings are also connected in parallel to provide the same low-voltage output. This method is typically used to increase the overall capacity to meet larger load demands. In this case, the transformers should have equal rated capacities to ensure that they share the load evenly.

2. Automatic Switching: Automatic switching is often used for redundancy and backup systems to ensure that one transformer can take over if another fails. In this case, each transformer is connected to the same high-voltage power source and to the same load. However, only one transformer is active at a time, while the others are in standby mode. Using automatic switches or control systems, the operational status of the primary transformer is monitored, and in case of a primary transformer failure, the system automatically switches to the backup transformer to maintain a continuous power supply.

It is important to note that parallel operation of transformers requires ensuring that the transformer parameters (such as rated voltage, rated capacity, phase, etc.) match, and appropriate electrical protection devices should be installed in the system to ensure safety and reliability. Additionally, proper maintenance and monitoring of the transformers are crucial to ensure their smooth operation. Inappropriate parallel operation can lead to uneven load sharing, damage to transformers, or instability in the power system. Therefore, detailed electrical design and engineering planning are necessary in practical applications to ensure the proper parallel operation of transformers.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

Know more about power transformer:https://www.lstransformer.com/Transformers