The stored results for arc flash analysis have common field names for all equipment that support arc flash analysis. The equipment are, bus, MCC, panel, ATS and POC. The fault type used in the analysis is based on the short circuit option selected. The fault type is recorded as a field in the database while storing the results. Note that all of the stored result field names have the prefix of “AF” to indicate they come from arc flash analysis.
|
Label |
Description |
|---|---|
| AF Date Time |
The date and time stamp of when the arc flash results were stored in the database. |
| AF Date Time | The date and time stamp of when the arc flash results were stored in the database. |
| AF Fault Type | Fault type used in the arc flash analysis. |
|
AF Driving Point Voltage (pu) |
Driving point voltage used in the arc flash analysis. |
|
AF Calculation Method |
Type of calculation used in the analysis. Possible values are IEEE 1584-2018, IEEE 1584-2002, Doughty, Ralph Lee, HV Open Air, Maximum Power, etc. Note: When IEEE 1584-2018 method is selected in the arc flash options, if the voltage or current is out of range of the standard, the finally used calculation method may be different than IEEE 1584-2018. Refer to the chapter on arc flash analysis for more details. |
|
AF Main |
Shows whether the results were obtained using “including main” option or “excluding main” option. |
|
AF L-G Bus kV |
Line-to-ground voltage for the bus. |
|
AF Trip Device Name |
ID Name of the trip device used on the arc flash analysis |
|
AF Trip Device Bus Name |
ID Name of the bus at which the trip device is connected. |
|
AF Trip Device Function ID |
Device function ID of the relay used in the arc flash analysis. |
|
AF Trip Device Function |
Name of the relay function used in the arc flash analysis. |
|
AF Gnd |
For IEEE 1584-2002 method, shows whether the effectively grounded parameter was used. |
|
AF Electrode Gap (mm) |
Gap between conductors in mm. For most cases this will be the same value as the gap specified in the bus data. In the case of HV Open Air arc flash calculation method, the gap can be voltage dependent and calculated by the method. |
|
AF Bus Bolted Fault (kA) |
Bolted fault current used in arc flash analysis. |
|
AF Bus Arc Fault (kA) |
Calculated arc current. |
|
AF Branch Bolted Fault (kA) |
The bolted fault current seen by the trip device. |
|
AF Branch Arc Fault (kA) |
The arc current seen by the trip device. |
|
AF Trip Time (sec) |
The trip time of the trip device. |
|
AF Trip Time (branch bolted fault) (sec) |
Trip time calculated for the device using bolted fault current seen by the trip device. This value is used mainly for service entrance marking. This value does not include the breaker opening time if operated by a relay. |
|
AF Opening Time (sec) |
Opening time of the breaker or switch tripped by a relay. |
|
AF Arc Time (sec) |
The total time taken to clear the arcing fault. |
|
AF Clearing Time (branch bolted fault) (sec) |
The total clearing time calculated for the device using bolted fault current seen by the trip device. This is value is used mainly for service entrance marking. |
|
AF Boundary (in) |
Arc flash boundary. |
|
AF PPE Boundary (in) |
The distance at which the incident energy would be equal to the specified PPE rating. |
|
AF Limited Approach Boundary (feet) |
Limited approach boundary in feet. |
|
AF Limited Approach Boundary (m) |
Limited approach boundary in meters. |
|
AF Restricted Approach Boundary (feet) |
Restricted approach boundary in feet. |
|
AF Restricted Approach Boundary (m) |
Restricted approach boundary in meters. |
|
AF Working Distance (in) |
Working distance from the analysis. The results could be based on the arc flash options, or the options in the bus data, or calculated. When HV open air method is used the working distance is calculated by the method. |
|
AF Incident Energy (cal/cm2) |
Incident energy at the working distance. |
|
AF PPE Level |
The level text from the PPE table in the library. |
|
AF PPE Description |
The Description text from the PPE table in the library. |
|
AF Comments |
Comments generated by the program when a parameter is out of range from the standard. |
|
AF Threshold Energy (cal/cm2) |
Threshold value of incident energy specified in the Arc Flash Options. When the calculated incident energy exceeds the threshold, the results are included in the Incident Energy Threshold Report. |
|
AF Threshold Diff Percent % |
Ratio of the calculated energy to the threshold energy in percent. When the System Option of “Use 100% convention for displaying analysis overloads/overduties” is Off, the difference is displayed in percent. |
