240volt 103" panasonic tv in building with 208v in miami, fl

[dave lechtenberg]

Hello All. I installed two Panasonic 103" plasma tv's that are 240v 50/60hz 1550 watts. I have a dedicated 208 plus a dedicated 110(or 120) to each. These were 100 grand each in 2006 and are elevated in a lift only lobby situation. I need to make these work. They are separated by an elevator core and the path between them is about 75' if there is one solution for both. I assume some step up transformer. There are about 12 fans on each which is most of the draw. Thanks in advance

 

[Dennis Alwon]

If the 208 volt circuit is dedicated then that would handle both TV... Yes a step up trany would work but are you certain that the TV won't work on 208V

 

[Ingenieur]

Similar spec http://panasonic.net/prodisplays/download/pdf/specsheet/TH_103PF12U.pdf
220-240 50/60 Hz 1400 W

a small step up seems the way to go
perhaps a boost xfmr but a 2 winding would provide some isolation
2 kva each or 5 for both

 

[GoldDigger]

If the 208 volt circuit is dedicated then that would handle both TV... Yes a step up trany would work but are you certain that the TV won't work on 208V

The power supply for the TV would likely work fine on 208, but if the fans are running directly off AC rather than controlled DC their motors might overheat when pushing the required amount of air. If the spec says nominal 230, or say 220-250, best not to risk trying to run them on 208.
I would be perfectly happy to use a boost autotransformer at each TV or a single autotransformer at a common point in the circuit, whichever is more economical to buy and wire.
I do not see any reason to need isolation between the two units, so full power isolation transformers would be, IMHO, a waste of money (and power even when the TVs are turned off.)
An isolation transformer's unloaded primary will draw about ten times the current that the unloaded primary of an autotransformer does.

 

[Ingenieur]

A selection of at boost type
Various kva depending on whether you use 1 or 2 xfmrs
208/230

http://www.automationdirect.com/static/specs/buckboosttransformerspecs.pdf

 

[Dennis Alwon]

The power supply for the TV would likely work fine on 208, but if the fans are running directly off AC rather than controlled DC their motors might overheat when pushing the required amount of air. If the spec says nominal 230, or say 220-250, best not to risk trying to run them on 208.

I agree... I looked up a new unit and it stated 220-240v. I would call Panasonic and see if a trany is necessary.

 

[M_J_C]

Operational Voltage Range on Panasonic TH-103PF12U

Operational Voltage Range on Panasonic TH-103PF12U

The last batch of 103's we installed years ago ran fine on 208v. The manual on the Panasonic web site states that 200v-240v, 50/60Hz is acceptable.
Panasonic built this to work just about anywhere in the world, since it was so expensive and a limited production.
Do you have a different model?

Specs are on page 65

ftp://ftp.panasonic.com/pub/Panasonic/business/proplasma/manuals/TH-103PF12U_oi.pdf

 

[Ingenieur]

The last batch of 103's we installed years ago ran fine on 208v. The manual on the Panasonic web site states that 200v-240v, 50/60Hz is acceptable.
Panasonic built this to work just about anywhere in the world, since it was so expensive and a limited production.
Do you have a different model?

Specs are on page 65

ftp://ftp.panasonic.com/pub/Panasonic/business/proplasma/manuals/TH-103PF12U_oi.pdf

Strange
the link I posted was 220-240
we need the model number

 

[GoldDigger]

The "_oi" suffix may perhaps indicate an international variant?

 

[Smart $]

The "_oi" suffix may perhaps indicate an international variant?

It does not.... stands for "operating instructions".

 

[JFletcher]

I just had to Google "$100,000 TV". :blink: