An existing 480V motor control center is feeding a new 480V panelboard in a new building. The existing motor control center has surge protection. Is it necessary to have an SPD for the new 480V panel, when the 480V motor control center already has surge protection? Thanks.
SPD for new 480V panel
- Thread starter rc7288
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ATSman
ATSman
- Location
- San Francisco Bay Area
- Occupation
- Electrical Engineer/ Electrical Testing & Controls
SPD
SPD
SPD protection is used to protect sensitive solid state devices/ circuit boards from damage caused by high voltage transients as a result of utility line switching (i.e. PFCC banks) lightning, etc. The best protection is achieved by installing them as close to the load you are trying to protect (18" or less.) The higher the Joule (energy) rating, the more they cost.
The attached file is from an email so read from the bottom up :
SPD
SPD protection is used to protect sensitive solid state devices/ circuit boards from damage caused by high voltage transients as a result of utility line switching (i.e. PFCC banks) lightning, etc. The best protection is achieved by installing them as close to the load you are trying to protect (18" or less.) The higher the Joule (energy) rating, the more they cost.
The attached file is from an email so read from the bottom up :
mgookin
Senior Member
- Location
- Fort Myers, FL
- Occupation
- Retired inspector, plans examiner & building official
He's a student. I had answered his question but then didn't post it.
He needs to figure out why a MCC has surge protection and solve his homework problem from there.
OP: We don't do homework. We help you if you propose a solution.
Why is surge protection often used at motors?
He needs to figure out why a MCC has surge protection and solve his homework problem from there.
OP: We don't do homework. We help you if you propose a solution.
Why is surge protection often used at motors?
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