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Predicting Let-Through Arc-Flash Energy for Current-Limiting Circuit Breakers

机译:预测限流断路器的直通弧闪能量

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摘要

IEEE 1584, “Guide for Performing Arc-Flash Incident Energy Calculations,” provides a method to conservatively predict the incident energy let-through by over-current devices based on the device''s time–current curve or tested transfer functions. Additional testing by various manufacturers has shown that current-limiting (CL) circuit breakers (CBs) operating in their instantaneous CL range perform significantly better than what the IEEE 1584 Time–Current Curve-based model predicts. The authors will present an analytical method to estimate the incident energy from published CB let-through curves. The method will provide a conservative, yet better, estimate of the actual performance when compared to test data. This method can be used as a part of hazard risk planning rather than the Time–Current Curve method described in IEEE 1584 or when the manufacturer does not provide an incident-energy transfer function based on tests.
机译:IEEE 1584“执行弧闪事件能量计算指南”提供了一种方法,可以根据设备的时间-电流曲线或经过测试的传递函数,保守地预测过电流设备传递的事件能量。多家制造商的其他测试表明,在其瞬时CL范围内运行的限流(CL)断路器(CB)的性能明显优于基于IEEE 1584时间-电流曲线的模型所预测的性能。作者将提出一种分析方法,根据已发布的CB穿透曲线估算入射能量。与测试数据相比,该方法将提供对实际性能的保守但更好的估计。该方法可以用作危害风险计划的一部分,而不是IEEE 1584中描述的时间-电流曲线方法,或者在制造商未提供基于测试的事件能量传递函数的情况下,也可以用作此方法。

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