Transformer Protection Terminal RET 521 ABB for Power Systems Industrial Automation Communication Module supporting the flexibility of your

supporting the flexibility of your I/O system

Voltage Input: 0 to 10 VDC (scalable range)

ensuring fast availability for urgent replacements or upgrades

providing efficient voltage and current regulation

Parameter Specification Model / Part Number 1VCR0170530006 / 1VCR017053G0006 Function Power Supply Board Module Dimensions 17

Transformer Protection Terminal RET 521 ABB for Power Systems Industrial Automation Communication Module supporting the flexibility of yourOverview 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