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In the USA how do you wire a refrigerator purchased in Singapore 240V single phase if you understand the 50Hz motor will run faster on 60Hz?
Wiki User
∙ 14y ago
In general the answer has to be: "Not if it has been designed and wired to run only on the 50 Hz mains frequency system that is used in Singapore, Europe and elsewhere." The mains frequency in 230 Volt areas is 50 Hz (Cycles per second) compared to 60 Hz in US, Canada and other 120/240 Volt areas. Some 50 Hz appliances may work fine but others with simple motors will run too fast on the higher frequency of 60 Hz.
However the most important difference is how the Neutral wire is connected:
In a 240 Volts 50 Hz appliance has 3 wires altogether, a "Ground" conductor, one single 240 volt "live" or "hot" wire and a Neutral wire connected as a return to the single "hot".
An appliance designed to run on 240 Volt 60 Hz supply has 4 wires altogether: a safety "Ground" conductor and 3 further wires, namely a Neutral wired as a "central" common return conductor and two 120 Volt 60 Hz live "hot legs" which run in opposing phase to one another. When one hot leg is "+" (120 Volts positive) the other leg is "-" (120 Volts negative).
So there is a 240 Volt voltage difference between the "Neutral" and the "Hot" conductor in the 50 Hz system and only a 120 Volt voltage difference between the "Neutral" and the "Hot"conductors in the 60 Hz system. At the point where the "Neutral" gets connected to the "Ground" (not necessarily in the appliance itself but at the main breaker panel) this difference will cause serious problems!
That is why an appliance designed to be connected onto the 50 Hz system cannot be used safely on the 60 Hz system without first having proper technical modification work done. A licensed electrician or electrical engineer would be able to consider whether or not a particular large appliance, that was manufactured to work on 50 Hz-only, could be modified to run safely at the higher 60 Hz frequency. However it won't usually be worth the expense of doing the work because it would be more cost-effective to buy (new or secondhand) an equivalent large appliance designed to work on 60 Hz. Further information which may be useful to mention here but is not part of the answer to this question:Some small 50 Hz appliances, such as electric shavers, etc., have been designed to run safely on different supply voltages and frequencies. If that is so, it would be stated on their rating plates. In many cases, where the power needed is low, such as (say) less than 30 Watts, a cheap and simple "International Travel Socket Adapter" is all that is needed to make such an appliance plug-in and work. Many international airports have shops selling such adapters. <><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work AND
always use an electrician's test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized. : IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Wiki User
∙ 14y ago
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Does a banana spoil faster on a counter or refrigerator?
the refrigerator
Will a banana brown faster in the refrigerator or on the counter the average?
in the refrigerator
Why does a banana go brown faster in the refrigerator?
The skin goes brown faster in the refrigerator, while the fruit does not ripen further.
Will the brand of the banana determine whether the banana will brown faster on the counter or in the refrigerator?
It does not matter what brand. Bananas turn brown faster in the refrigerator.
Do blueberries rot faster on the counter or refrigerator?
Blueberries rot faster on the counter.
Does soda lose its fizz faster in a room or in the refrigerator?
It looses it faster in a room
Do bananas rot faster in the light or in the refrigerator?
In light, because in a refrigerator bacteria is less likely to survive as long as outside of a refrigerator
Do tomatoes spoil faster at room temperature or in a refrigerator?
they spoil faster at room temperature
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Water is evaporated faster outside a refrigerator.
Does food in a small refrigerator spoil faster than a large refrigerator?
If they are both set at and holding the same temperature - No.
Does a banana brown faster on the counter or inside the refrigerator?
on the counter
Do bananas rot faster on the counter or in the refrigerator?
Refridgerator yea it will
