Age: 23 Joined: 17 Jan 2008 Posts: 3 Location: kl-jb
Posted: 2008-01-28, 02:34 3-phase power system on residential
hi all. what is the advantages & the disadvantages on applying 3-phase power system towards residential housing instead of single-phase? if possible can anyone prove the answers with any theories or calculations. thanx guys
Posted: 2008-01-29, 02:20 Re: 3-phase power system on residential
ayulsan wrote:
hi all. what is the advantages & the disadvantages on applying 3-phase power system towards residential housing instead of single-phase? if possible can anyone prove the answers with any theories or calculations. thanx guys
Pro's:
* You can run 3 phase appliances (compressors, welders, large pumps)
* You essentially have 3 separate single phase lines to draw off, therefore allowing a larger capacity of consumption
*You can share outlets amongst phases
Cons:
*If a phase drops, your 3 phase appliances won't work
*You have 3 fuses to worry about at your service mains
*Your electricity provider has to worry about 3 step down transformers (normally) therefore more downtime during maintenance.
Posted: 2008-04-20, 12:24 Re: 3-phase power system on residential
sherrinator wrote:
* You essentially have 3 separate single phase lines to draw off, therefore allowing a larger capacity of consumption
Not true. Undoubtedly for a given load the three-phase supply would be a third smaller. I can put the same amount of load on a three-phase system as I can on a single phase system, within reason. The only case where this may be true is that three-phase appliances generally use more power.
sherrinator wrote:
*If a phase drops, your 3 phase appliances won't work
Conversely your single phase loads are more immune to loss of a phase.
sherrinator wrote:
*Your electricity provider has to worry about 3 step down transformers (normally) therefore more downtime during maintenance.
Not sure what this means. Electricity is generally distributed in three-phase, by three-phase transformers
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