Backup UPS capacity and PSU capacity?

[travistee]

I have a seasonic 550HT.
I wanted to use a backup UPS that would work with it.
I had a APC Back UPS ES 500, but that seemed to have too low a wattage capacity for my old Antec 430, so I thought it would not work with the 550HT. It works with the 430 but if I have the monitor plugged into the battery backup side it sometimes overloads.

So I got an APC RS1500VA LCD.

The LCD shows how much wattage it is actually using.
The Antec 430 was getting to over 200 watts but the 550HT rarely goes over 150 watts and idles at 105 with the system on.

The 430 was used with a Pentium D 820 and the 550HT is used with an i7 920.
So did I really need the RS1500VA or could I have used the ES500 with the 550HT?

Can I get an explaination of the voltage of the UPS with the kind of PSU it can handle?

[Toasty]

Re: Backup UPS capacity and PSU capacity?

The 550 is a higher efficiency unit than the old 430. That's why the difference in power consumption. They're both producing the same voltage and current for the system, but the 550 does it better.

The voltage of UPS is as rated. It can handle any PSU and system unless otherwise specified by APC.

The reason the monitor will kill or overload the UPS is because when initially turned on the monitor "degausses" its screen. A degaussing coil is essentially a large loop of wire wrapped around the edges of the screen. It serves to demagnetize the grid in the CRT so colors are accurate. Pass a magnet near a CRT and you'll see color distortion. A CRT can become magnetized simply from the earth's magnetic field and it will distort the colors. All color CRT's have this coil.

So, when you turn on the set, the AC current to the coil passes through a positive temperature coefficient (PTC) thermistor and a relay. As the temperature of the thermistor rises, so does its resistance. The current to the coil is slowly reduced and eventually drops to near zero. At this time the relay disconnects the coil completely until you again cycle the power or wake the monitor from sleep.

Toast

[dood]

Re: Backup UPS capacity and PSU capacity?

Your RS1500VA LCD UPS will run your system for longer in the event of an outage than the old ES500 would have.