190V drop from wall

[Oalei]

So someone else from my country said the normal voltage is 220V when it's day but it's different for night 190V, I have other things to concern either like installation, grounded or not. So my real question is there anything to like minimise the danger. I had found 1 voltage regulator? 

[mariushm]

Modern switching power supplies work with wide input voltage, like 90v...250v AC

Some are 230v only, but even these are somewhat flexible and should work with 190v.

 

Check if your computer's power supply is this kind of power supply, it would be written on the back where you plug the power cable, or on the label glued to the power supply (inside the case).

 

There are voltage conditioners which can boost the voltage, but if your power supply is designed for wide input range, it would be pointless.

 

A line interactive UPS may consider 190v too low and automatically boost the AC voltage to 220-230v, or use the internal batteries to power your computer when the voltage goes that low. The UPS would be a better choice, as it also protects your computer against power failures.

 

As for grounded or not ... always plug the PC in outlets that have 3 terminals... you can check if the earthing pin is actually doing something using multimeters... but if you don't know how to use one, it's better to just call an electrician and ask him to check your outlets to make sure they're properly installed.

 

[Oalei]

21 minutes ago, mariushm said:

Modern switching power supplies work with wide input voltage, like 90v...250v AC

Some are 230v only, but even these are somewhat flexible and should work with 190v.

 

Check if your computer's power supply is this kind of power supply, it would be written on the back where you plug the power cable, or on the label glued to the power supply (inside the case).

 

There are voltage conditioners which can boost the voltage, but if your power supply is designed for wide input range, it would be pointless.

 

A line interactive UPS may consider 190v too low and automatically boost the AC voltage to 220-230v, or use the internal batteries to power your computer when the voltage goes that low. The UPS would be a better choice, as it also protects your computer against power failures.

 

As for grounded or not ... always plug the PC in outlets that have 3 terminals... you can check if the earthing pin is actually doing something using multimeters... but if you don't know how to use one, it's better to just call an electrician and ask him to check your outlets to make sure they're properly installed.

 

Well gonna search for modern apfc then thanks man. Well it's U9 so maybe it have 1.

There is different kinds of ups right? 

Mine have 2 just 2 holes there is no hole 1 that is unusable. 

[OrionFOTL]

3 hours ago, Oalei said:

Well gonna search for modern apfc then thanks man.

How did you get "modern apfc" out of mariush's post? Input voltage rating and Active PFC are not related in any way. There are lots and lots of 230V-only active PFC power supplies.

If you're looking for a 110-230V input power supply, search for a 110-230V input power supply.

 

If by "it's U9" you mean you have Be Quiet System Power U9, then it's rated to work with 110-230V.

[Oalei]

14 minutes ago, OrionFOTL said:

How did you get "modern apfc" out of mariush's post? Input voltage rating and Active PFC are not related in any way. There are lots and lots of 230V-only active PFC power supplies.

If you're looking for a 110-230V input power supply, search for a 110-230V input power supply.

 

If by "it's U9" you mean you have Be Quiet System Power U9, then it's rated to work with 110-230V.

idk just like assuming things for no reason at all? ok got it i learn that later on that not all APFC supports 100-230V like a other PSU MWE white,VS maybe its 100-120V and 200-230V iirc.

yeah i just lucky to find U9 that it support 100-230V.

yeah it is BQ U9 thanks for clarifying.

[Guest]

8 hours ago, mariushm said:

Modern switching power supplies work with wide input voltage, like 90v...250v AC

Some are 230v only, but even these are somewhat flexible and should work with 190v.

For clarity:

 

There's more than enough power supplies still on the market today that are rated at "230V only", and while they SHOULD support down to 190V, many don't.  And many will actually blow up instead of latch off at those lower mains voltages because they use a standard, off the shelf (read: cheap) PWM controller and the switching diode is rated right at the margin of their use case.

 

That said:

 

If you DO have a "quality" PSU that advertises "90-230V" or "``100-240V", etc., then 190V would be fine.

 

To be fair:

 

Even full range PSUs have issues at low line voltage.  A "full range" PSU should be able to go down to 100V, especially if the label says it should, and shouldn't blow up.  But I went through THREE of a particular PSU that was labeled for 100V - 240V but when voltages dropped to 100V under load, it didn't even latch.  It exploded.  THREE TIMES.  THREE DIFFERENT UNITS.