DC Arc Flash Transient Analysis

IEC-61660

Overview

The DCAF- Transient Analysis method allows an accurate dynamic representation of DC power systems under arc fault conditions for special class of DC equipment that utilizes time-based transient short circuit currents using IEC -61660.

This module combines the system short-circuit characteristics and the dc arc equations to estimate the arc voltage and resistance for dc incident energy calculations and estimate how those characteristics can change under changing bolted fault currents. The theory and background of this module can be referenced in “Methods for Evaluating DC Arc-Flash Incident Energy in Battery Energy Storage Systems,” 2023 IEEE IAS Electrical Safety Workshop (ESW), Reno, NV, USA, 2023, pp. 19-29, doi: 10.1109/ESW49992.2023.10188335 by Albert Marroquin and Terry McKinch [7].

Key Features

Evaluate arc currents based on dynamic behavior of Battery Energy Storage Systems (BESS) such as Li-Ion or Lead Acid batteries, Nickel cobalt etc.
New Battery models in the ETAP library
Calculate Short-circuit and arc current profile for following equipment
- Batteries
- DC Capacitors
- DC Loads
Evaluate Incident energy based on rise, peak and steady state time of BESS using IEC-61660, Stokes and Oppenlander and DGUV -I-203-077 methodology.

Arc flash plots
- Bolted Fault current
- Arc current
- Arc Voltage
- Arc Energy
- Incident energy
Consider the effect of arc erosion based on conductor cross section
Consider Arc elongation effect
Evaluate the incident energy for DC capacitors
Stand alone arc flash calculator to determine effect of gap based on arc erosion

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DC Arc Flash - Transient Analysis