The is a specialized software tool designed to facilitate lightning risk management for simple structures. Originally introduced in Annex J of IEC 62305-2:2006 , SIRAC allows users to estimate the necessity of lightning protection systems (LPS) without requiring exhaustive knowledge of the standard's detailed methodologies. Core Functionality and Purpose
It is crucial to understand that is specific to IEC 62061 , which determines Safety Integrity Levels (SIL) . This differs from ISO 13849-1 , which uses a risk graph to determine Performance Levels (PL) .
(Loss of Cultural Heritage): Economic and social value of irreplaceable items. 3. Protection Measure Simulation simplified iec risk assessment calculator sirac
Many of these parameters are selected from drop-down lists based on the standard’s definitions, reducing the need for manual calculation of variables. Once the data is entered, SIRAC quickly computes the relevant risk components. The final output determines if the calculated risk for a structure (e.g., risk of loss of human life) exceeds a tolerable level (typically (1\times10^-5)) and identifies whether lightning protection is recommended.
SIRAC operationalizes the from IEC 62061 (Annex A). It calculates Risk Reduction and determines required SIL (Safety Integrity Level) or PL (Performance Level) by scoring four parameters: The is a specialized software tool designed to
: It reduces the complex calculations involving approximately 70 parameters in the full standard to a more manageable subset.
In the world of machinery safety, the IEC 62061 standard provides a rigorous framework for assessing risk. However, its formal methodology—requiring detailed parameter scoring (Severity, Frequency, Avoidance, Probability) and complex calculations—can be daunting for small to medium-sized enterprises or for early-stage design reviews. This differs from ISO 13849-1 , which uses
While groundbreaking at its release, SIRAC has largely been superseded. It was of IEC 62305-2 because it was limited to single-zone structures and was not precise enough for modern, complex engineering projects. IEC Risk Assessment Calculator - Download
Accurate zone classification prevents "over-engineering." Facilities can avoid buying expensive explosion-proof (Ex-rated) equipment for areas that a calculator proves can be classified as non-hazardous through optimized ventilation.