Are there any restrictions regarding usage of VFD (Variable-Frequency Drive) for regulating motor speed, in a Class 1, Div 2 area?
From my least knowledge, it is only refered with respect to the motor it regulating and its AIT.
A note: It seems that Class 1, Div 2 is the most complicated classified area. On one hand it is not really considered hazardous zone, so most of the standard equipment can be used. On the other hand the equipment might require certifications, and not all of them clearly stated, so you might stumble over few bumps before characterize the suitable equipment...
Fortunately, I found this forum that helps me a lot!
From my least knowledge, it is only refered with respect to the motor it regulating and its AIT.
A note: It seems that Class 1, Div 2 is the most complicated classified area. On one hand it is not really considered hazardous zone, so most of the standard equipment can be used. On the other hand the equipment might require certifications, and not all of them clearly stated, so you might stumble over few bumps before characterize the suitable equipment...
Fortunately, I found this forum that helps me a lot!