roger deas
Member
- Location
- North_Carolina
How many here have actually repaired known damage due to additive harmonic heating.
I know of occasions where burned neutrals were blamed on this in modular office furniture until identical units were opened up and the neutral(actually all of the conductors) were shown to be loose in virtually every unit. (poor quality control)
I have seen one 30 KVA transformer have problems, then was replaced with a K 4 and had no problems afterwards.
This was in an electronics bench testing area in a refurbished building where existing equipment was utilized. The electronics company actually said the problem would occure when they started using the facility. (obviously knew their products)
I know of one other case I have been involved with. This was (2) copiers on a 4 wire multiwire branch circuit.
A major portion of our work is in hospitals and I personally have not seen any cases in these facilities. (Note I said personally)
I was just curious to actual cases the people here have experienced
Roger
I know of occasions where burned neutrals were blamed on this in modular office furniture until identical units were opened up and the neutral(actually all of the conductors) were shown to be loose in virtually every unit. (poor quality control)
I have seen one 30 KVA transformer have problems, then was replaced with a K 4 and had no problems afterwards.
This was in an electronics bench testing area in a refurbished building where existing equipment was utilized. The electronics company actually said the problem would occure when they started using the facility. (obviously knew their products)
I know of one other case I have been involved with. This was (2) copiers on a 4 wire multiwire branch circuit.
A major portion of our work is in hospitals and I personally have not seen any cases in these facilities. (Note I said personally)
I was just curious to actual cases the people here have experienced
Roger