Just finishing large industrial production shop job when client states that florescent lamps flicker when ever the power miter chop saw is started. They find this to be very bothersome and it is only piece of machinery that causes problem. Seems to affects lights in office areas too which are supplied by a separate panel. Looking for best product to prevent this from affecting lights - and price is a consideration. Any suggestions??? Most equipment is 208 v single phase but this saw is 120v.
Fixed chop saw line noise reduction
- Thread starter moresi
- Start date
- Status
Electric-Light
Senior Member
Fluorescent lighting is hardly ever fed 208v. If it's a 208Y/120, the ballasts are 120v. Can you run the saw on an outlet fed from a phase other than the one feeding lights?
Modern 120-277v ballasts will work on 208v, but I've never seen a 208v magnetic ballast. Fluorescent lights are almost always 120 or 277 in the US.
People's Republic of Canadia use 347v ballasts as well.
Last edited:
stevebea
Senior Member
- Location
- Southeastern PA
480 volt ballast also available for T5 and T8.
Electric-Light
Senior Member
Available, but uncommon. They're used for replacing high-bay HIDs running on 480v.
gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
110613-2347 EDT
moresi:
You need to provide more information.
I suspect the chop saw you are referring to is a rather small unit if it operates on 120 V, and is likely a universal motor. Meaning essential a series field brush type motor. This will have a large inrush current, and there is a large inertia load. Large diameter blade.
I doubt it is a large industrial shop. What is the amp rating of the service?
I suggest a possible solution is a 208 to 120 V transformer sized not much larger than the requirement of the motor at full load. Connect the primary of this transformer directly to the main panel with its own breaker and not thru some other circuit's breakers. The transformer needs to be near the chop saw rather than near the panel. Choose two supply legs that may not relate to the lights being bothered.
If this is really a large service, like 800 A, then there may be other problems that this is identifying.
.
moresi:
You need to provide more information.
I suspect the chop saw you are referring to is a rather small unit if it operates on 120 V, and is likely a universal motor. Meaning essential a series field brush type motor. This will have a large inrush current, and there is a large inertia load. Large diameter blade.
I doubt it is a large industrial shop. What is the amp rating of the service?
I suggest a possible solution is a 208 to 120 V transformer sized not much larger than the requirement of the motor at full load. Connect the primary of this transformer directly to the main panel with its own breaker and not thru some other circuit's breakers. The transformer needs to be near the chop saw rather than near the panel. Choose two supply legs that may not relate to the lights being bothered.
If this is really a large service, like 800 A, then there may be other problems that this is identifying.
.
- Status