Arc flash hazard is not calculated and the report shows “No Valid Trip Device Found Upstream or in Bus Dialog”
All buses that are analyzed require either an upstream trip device with all the necessary information entered, or arcing duration specified in the Bus Data dialog box. The program can determine arcing duration based on the time-current characteristics (TCC) of the trip device. The TCC can be determined only if all the necessary information has been entered in the trip device dialog box. For more information on protective data, see Protection & Coordination™.
Checklist for trip device data:
HV Fuses: Manufacturer > Type > Style > Model > Fuse Size.
LV Fuses: Manufacturer > Type > Style > Fuse Size.
Thermal Magnetic LV Breakers: Manufacturer > Type > Style > Frame > Trip Amps > Instantaneous Setting (if applicable).
Solid State Trip LV Breakers: Manufacturer > Type > Style for breaker. AND for solid state trip Manufacturer > Type > Style > Frame/Sensor > Tap/Plug > LTPU > LT Delay > STPU > ST Delay > Inst Pickup for Phase Trip.
Relays: Manufacturer > Type > Device Function > Tap > Time Dial > Inst Pickup > Inst. Delay (whatever is applicable) for phase.
Note: Ground trips are ignored for arc flash when the 3-phase fault type is selected.
