Transformer Protection Terminal RET 521 ABB for Power Systems Industrial Automation Communication Module its compact rack-mounted design simplifies

its compact rack-mounted design simplifies integration into existing MicroNet chassis

providing efficient voltage and current regulation

Product Type: Safety Digital IO Module

Voltage Input: 0 to 10 VDC (scalable range)

Transformer Protection Terminal RET 521 ABB for Power Systems Industrial Automation Communication Module its compact rack-mounted design simplifiesOverview The ABB RET 521 is a numerical microprocessorbased protection terminal that provides advanced transformer protection functions in a compact design. It is engineered to safeguard twowinding and threewinding transformers, generatortransformer blocks, and reactors. Moreover, it integrates multiple protective features such as inrush restraint, overexcitation protection, and zerosequence current elimination. In addition, the RET 521 supports