Shielded transformers should be used where sensitive electronic or communication equipment loads are connected to the transformer secondary. Shielded transformers are designed with special magnetic shielding to reduce electromagnetic interference (EMI) and radio frequency interference (RFI).
Sensitive electronic devices, such as computers, telecommunications equipment, and medical devices, are susceptible to electromagnetic interference, which can cause malfunctions, data corruption, or signal degradation.
By using shielded transformers, the magnetic fields generated by the transformer are contained, reducing the potential for EMI and RFI and ensuring the reliable and interference-free operation of the connected sensitive equipment. This helps maintain the quality and integrity of electronic and communication systems.