IEC 63497:2026 pdf download,Shunt-connected active correction devices (ACD).
IEC 63497:2026 is a product standard that sets safety, EMC, and performance requirements for shunt‑connected active correction devices (ACD) used in low‑voltage power systems, with ratings up to 1,000 V AC or 1,500 V DC. It applies to cord‑connected or permanently installed units—movable, stationary, or fixed—covering both static VAR generators (SVG) and active harmonic filters (AHF).
The core purpose of an ACD is to perform one or more of: active harmonic filtering, reactive power compensation, and unbalanced load compensation. Additional functions such as flicker or interharmonic compensation are explicitly excluded from this standard. For hybrid systems combining passive filters and ACDs, only the active part falls within the scope.
The standard defines design, construction, and testing criteria, including protection against electric shock, mechanical hazards, fire, and excessive temperature. It also specifies EMC limits, performance tolerances, and verification methods to ensure stable, reliable operation under distorted grid conditions. It excludes devices like variable speed drives, UPS, passive filters, and series‑connected compensators.
As the first dedicated IEC standard for ACDs, it unifies technical requirements for manufacturers, test labs, and grid operators, improving power quality, system efficiency, and safety in industrial and commercial electrical installations worldwide.