Calculator-style interface makes complex calculations easy to understand.
Provide a safer working environment by specifying the proper level of PPE. Wearing inadequate clothing is dangerous for obvious reasons, but wearing too much clothing is dangerous due to limited mobility and visibility.
Design safer power systems while insuring compliance with NEC 110.16, OSHA, NFPA 70E and IEEE 1584 standards.
Avoid potential fines, lost productivity, and increased insurance and litigation costs.
Save time by generating arc flash warning labels in electronic .JPG and .BMP formats
Customize labels by selecting and adding information displayed on them.
Save results in generic text format for future reference or printing with one button click.
Perform analysis using metric (mm, Joules ), imperial units (inches, calories ), or even a mix of both
Calculate arc blast explosion pressure and arc TNT equivalent
Create warning labels in English, French or Spanish
Clearing time for the range of 0.004 sec to 2 seconds is to be entered into this box. The clearing time for a current limiting fuse is approximately 1/4 cycle or 0.004 seconds. The clearing time of a circuit breaker is approximately 0.1 seconds or 6 cycles. This can be broken as follows: actual breaker time (approximately 2 cycles), plus relay operating time of approximately 2 cycles, plus an additional safety margin of 2 cycles, giving a total time of 6 cycles.
Available 3 phase bolted fault current for the range of 16kA to 50kA at the point where work is to be performed is entered into this box in kA. Example: if 42,357 amps are available, enter 42.357 into this box. If 16,000 amps are available, enter 16 into this box.
Flash protection boundary: An approach limit at a distance from exposed live parts within which a person could receive a second-degree burn if an electrical arc flash were to occur. (per NFPA 70E) Flame resistant personal protection equipment (PPE) must be worn by anyone within the flash protection boundary.
The amount of energy impressed on a surface, a certain distance from the source, generated during an electrical arc event. (per NFPA 70E). This energy is generally expressed in calories/cm2. The surface of concern impressed on is the worker's body, particularly the head and trunk. Incident energy is calculated using variables such as available fault current, system voltage, expected arcing fault duration and the worker's distance from the arc. The data obtained from the calculations is used to select the appropriate flame resistant (FR) PPE, just as voltage level is used to select a class of rubber gloves.
This is used to determine the minimum rating of Personal Protective Equipment in calories per centimeter squared, with the intent to protect the worker from the thermal effects of the arc flash at 18 inches from the source of the arc. Review the Notes for Arc Flash Calculator for a more detailed explanation.