Questions about UPS with modem PC
Questions about UPS with modem PC
I have few questions about UPS, this is a local brand, would be MUCH appreciated if any of you here reply them in this order so I can get answers properly! Thank you!
1. VA , W is same thing?
2. Have a desktop PC, 1000 UPS power is enough to let me turn off my pc when power is down? Why is that UPS suddenly shuts down itself with the PC when power outrage happens? It didn't give me enough minutes to turn off my pc
3. 600 is enough power to protect our internet connection AND the modem power itself and lets us turn off them safely in enough time?
4. Do we need to empty then fill the UPS's built in power supply from time to time? To keep the UPS's lifespan?
5. What's the difference between online UPS and interactive UPS and APC UPS?
6. Which UPS type do we need to give us enough time to turn off our hardware safely before power outrage cuts down everything?
7. Is it possible that internet connection gets cut when power outrage happens but modem power itself doesnt affected?
Thank you so much
In AC circuits there are three main types of power that people usually focus on:
Load (or real) power: the energy being used for actual work
Reactive power: the energy required to build up inductors and capacitors, which doesn’t perform work directly
Apparent power: the sum of load and reactive power
VA stands for apparent power, W is the load power.
I’m a bit confused because you mention the UPS shutting off immediately, but then say you don’t have enough time to do so. That suggests it doesn’t shut down instantly. Regardless, the duration a UPS lasts relies on battery size and the power consumption of connected devices at that moment.
Modems and routers can be safely turned off without issues; in fact, most have simple switches for this purpose.
The main reason to safely shut down a computer is to ensure any data you wish to save is preserved.
No. Particularly with a lead-acid battery in the UPS, which can greatly shorten its life if it reaches zero.
See https://en.wikipedia.org/wiki/Uninterrup...chnologies
Although APC is a brand, it isn’t a specific type of UPS.
To clarify this, you should perform a test with a power meter like a Kill-A-Watt. Connect the essential items—likely your computer and monitor—and perform an activity that consumes a lot of power. Record its VA value, which indicates how much power the UPS must supply. Measure how long it takes to shut down everything on the machine. For worst-case scenarios, multiply the VA by the shutdown time. This gives you the minimum battery capacity needed; you should add extra capacity (around 30-50%) for safety.
EDIT:
Battery capacity is usually listed in amp-hours. Divide the VA by 120 if you’re in North America or Japan, or by 240 otherwise. This will show how much current the system draws.
It also depends on whether the ISP has a backup power source (such as generators) available on site.