Category IEC Standards

IEC 61642:1997 provides guidance on the application of passive harmonic filters in industrial AC networks polluted by nonlinear loads such as variable-speed drives, rectifiers, arc furnaces, and uninterruptible power supplies. Although superseded in part by newer IEC/TR 61000 series documents,…

IEC 61643-11:2011 specifies performance requirements and test methods for surge protective devices (SPDs) intended for connection to low-voltage (LV) AC power circuits (50/60 Hz, up to 1,000 V RMS). It is the primary international standard governing SPD selection, classification, and…

IEC 61646:2008 establishes design qualification and type approval requirements for thin-film terrestrial photovoltaic (PV) modules. While IEC 61215 covers crystalline silicon modules, 61646 addresses the unique characteristics of thin-film technologies — amorphous silicon (a-Si), cadmium telluride (CdTe), copper indium gallium…

💡 Key Insight: IEC TR 61633 defines the serial highway extension of the CAMAC standard, enabling distributed data acquisition systems spanning hundreds of meters. This was a pivotal development that allowed CAMAC to scale from single-crate laboratory setups to large-scale…

💡 Key Insight: IEC TR 61634 serves as the foundational reference for the CAMAC system, one of the earliest standardized modular data acquisition architectures. Its design principles — mechanical modularity, electrical standardization, and protocol-based communication — directly influenced every subsequent…

💡 Key Insight: IEC 61639 defines the A-1 crate controller specification that standardizes how CAMAC crates interface with external highways and host computers. The precise timing parameters specified in this standard are essential for achieving deterministic, repeatable data acquisition in…

💡 Key Insight: IEC TR 61640 addresses the critical performance limitation of standard CAMAC — the single-word-per-cycle Dataway protocol — by defining block transfer modes that dramatically increase data throughput. These techniques, including Q-Stop and Q-Scan, enabled CAMAC to keep…

IEC TR 61624 is a technical report that provides detailed specifications for CAMAC crate controllers and the dataway protocol used in nuclear instrumentation systems. While IEC 60552 and IEEE 583 define the basic CAMAC standard, IEC TR 61624 extends these…

IEC 61628-1 is the international standard that specifies the requirements for corrugated pressboard used in electrical equipment, particularly in oil-filled power transformers. Corrugated pressboard is a specialized form of transformerboard (cellulose-based insulation) that has been corrugated to create a fluted…

IEC 61629-1 is the international standard that specifies the requirements for aramid pressboard used for electrical insulation. Aramid pressboard — commonly known by the trade name Nomex (meta-aramid) — is a high-performance synthetic insulation material that offers exceptional thermal stability,…