PSU gone bad? - Cause of Low Voltage?

[DigiBoy]

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Please close Mods. Thanks Istorya



Hi guys. Below is the Scenario

Last night, i plug my AVR into the outlet and turned it ON. We then experienced low voltage and i immediately disconnect the AVR and everything got back to normal. I second attempt it and it happened again but this time the low voltage gone bad so i need to turn off the main breaker. I turn it back ON and everything was normal.

I then plug the CPU directly into the outlet without the AVR. Same problem occured. I need to turn the main breaker for 5mins to get everything back up.

My problem is: what causes this? the AVR or the PSU?

PSU is generic - ( i forgot to the check the power. i think its 300W but i need to double check )
AVR is radius, no fuse, just a push button type circuit breaker

I experienced the same problem few months ago but everything went OK the second attempt. It was just last night that all the attempts fail and i didn't go further anymore.

addtnal details: my crt monitor is connected to the PSU and not into the AVR.

again. it was all working well before. sometimes this problem just occur, but last night was terrible

Where shall i start?

[AMD_infinium05]

My problem is: what causes this? the AVR or the PSU?

cause of this is your main power supply. VECO.

while you need to protect your computer from these notorious surges and low voltages, get a reliable PSU.

[DigiBoy]

So Veco is the culprit? not supplying enough load to homes? so unsaon nako ni? report this problem?

reliable PSU would be costly obviously.. oh my

any second the motion?

[eXpLoDe]

buy a step down type of avr like servo or somthing...

pulsan man ni palit ka ug PC pila man ang worth ana compare sa mag palit kag ug mahalon nga avr or ups?

[DigiBoy]

step down avr. can you give me some enlightenment regarding this? like unsai purpose ani, what does it do? does it have specs that i should check or something?

is this the same as step down transformer?

is this step down-step up used for lets say, ang imo appliance is 110V mao gamitan ug step up?

cencya. libog mode.

[eXpLoDe]

well you better read some of the thread post here. w8 i will dig for it... here it is.

https://www.istorya.net/forums/genera...ansformer.html

additional info.

Uninterruptible Power Supply Technologies Explained
Offline, Online and Line-interactive
What's the difference, and which technology is right for you?
There a three different types of UPS all suitable for different tasks, and supporting different types of load. Here are explanations of the different technologies, along with their advantages and disadvantages. Hopefully it will help you decide which type of UPS is suitable for you:

Offline-Standby Technology
During normal operation, the power flows straight through the unit and hence only RFI filtering is usually provided. When the input voltage fails or fluctuates outside of a pre-set tolerance window, the UPS detects this and a relay will close, allowing the UPS to start feeding battery power via the inverter. The inverter is then switched on and either a square, step or sinewave form output is supplied. Upon the return of mains power, the output is switched back onto mains and the inverter is turned off. Typically there will be a break of between 4-10 ms during the transfer to and from the battery mode.
Advantages: Low cost
Silent operation (when in standby)
Efficient
Disadvantages: Minimal power protection – only protects against a small percentage of problems
Poor output voltage regulation – fluctuations such as sags and surges will be passed straight to the load
Break transfer to battery mode
No failsafe – UPS will drop the load if there is a high start-up current, overload or inverter failure.

Line-Interactive Technology
A line-interactive UPS operates in a very similar fashion to an offline UPS, except with the advantage of better filtering and output voltage boost/reduce features. Whilst not eliminating mains-borne interference, line-interactive technologies reduce the impact of spikes, surges and sags by ‘clipping’ the peaks and valleys, boosting power or switching to battery back-up. As with offline UPS, when the input voltage fails or fluctuates outside of a pre-set tolerance window, the UPS detects this and a relay will close allowing the UPS to start feeding battery power via the inverter. The inverter, in a good line-interactive UPS, will supply a sinewave output. Upon the return of mains power, the output is switched back onto mains and the inverter is turned off. As with offline UPS, typically there will be a break on the transfer to and from battery mode, though usually this will be shorter than with an offline UPS.
Some manufacturers will try to pass their line-interactive UPS off as online models by calling them ‘digital online’, ‘inline’ or ‘online interactive’ – make sure you know what technology the UPS you are buying actually uses.
Advantages: Lower cost than online
Gives better protection than offline
Silent operation when in standby
Efficient
Disadvantages: Fluctuations, such as spikes, can still be passed straight to the load
Break on transfer to battery mode.
No failsafe – UPS will drop the load if there is a high start-up current, overload or inverter failure.

Online Double Conversion Technology
An uninterruptible power supply using true online double conversion technology provides the highest level of power protection available. The UPS converts the 230V input AC mains supply to DC power which is then used to charge the battery. The DC current flow is then fed through an inverter stage which reconstructs the 230V AC mains output. Because the AC output is completely regenerated, it will be completely free from any mains-borne interference such as spikes and voltage variations. The output voltage and frequency is controlled precisely, thus ensuring a clean and stable sinewave power output. Online UPS are able to withstand large fluctuations on the input voltage before transferring to battery power (typically 276V-184V) thus eliminating unnecessary battery discharges. Upon mains failure, transfer to battery power is seamless – no break. Online UPS also have various failsafe and self-diagnostic features that will instantly transfer the load onto mains power if there is a failure within the UPS hardware, or if the UPS is overloaded.
Advantages: Continuous & total power conditioning
Failsafe/overload protection with static bypass facility
No break on mains failure
Wide input voltage tolerance
Disadvantages: Because of the technology used, online usually costs more
hope maka decide na ka and to give info sa wala pa info about ups
depend on the brand of the ups naa sad ups with voltage regulation so avp and ups in one na.....

[DigiBoy]

well you better read some of the thread post here. w8 i will dig for it... and edit my post.

thanks for helping me dig. i dont know which part to dig and what to dig for. Thanks much.

@explode, ive read the thread but im not sure if sakto akong nabasa. my PC is 220V rated. so since your suggesting stepdown. so ang output sa AVR would be 110V right? so..... dili mu work for me?

@explode, maybe the UPS can help me with that. sigh... so confused. what if same ra ghpon and prob?





@mods, am i posting on the right thread? coz i really dont know the prob though. was thinking its with the CPU. so please transfer my thread if i posted in the wrong place. thanks.

[eXpLoDe]

probably ang common culprit is the main power line. base on your post there have been a power fluctuation. so better get a UPS.

[DigiBoy]

Pero ive noticed that if lain nga appliance akong i.turn ON, dili man pud mu ing.ato.. like when i turn on the TV or the lights.
kato ra gyud PC nga when i turn on mu ing.ato.

after that incident last night. when power was back to normal, i try to switch on the light, ni low power napud. murag wala pa cya naka "recover" so to say. so i shut down the main line again and wait further then power back ON. then ok na tanan.

[eXpLoDe]

well personal computer is very different from other appliances. PC are more sensitive in terms of power failure.

also get a decent reliable psu for a peaceful mind.

much better if you connection would be.

outlet>power surge>ups>psu