One phase galvanic isolation transformer
Diagnostics and Maintenance
Most modern UPS systems do not include the internal transformers that were present in earlier designs. This evolution has increased efficiency while decreasing the weight, size, and raw materials consumption of UPS systems. In the new transformerless UPS designs, the transformers are optional and can be placed in the best location to achieve a required purpose. In older designs, transformers were typically installed in permanent positions where they provided no benefit, reduced system efficiency, or were not optimally located.
Every data center power system includes transformers. Isolation transformers have historically had a number of different roles in the power architecture of data centers, industries, automation..:
Voltage stepdown from medium-voltage mains supply to the utilization voltage.
Within a UPS, to act as an integral part of the power conversion circuits
To create a local ground-bonded neutral
Within power distribution units or a UPS, to reduce harmonic currents
To provide taps to accommodate abnormally high or low mains voltage
To eliminate ground loops with multiple generators or mains sources