But how does the UPS work?
The operation, is to store energy in their batteries as long as they remain connected to the network, and release this when the energy fails. The duration can vary from 45 minutes to 1 hour and a half.
- Converter: Converts AC to DC;
- Batteries: Energy storage to be released in case of Black Out;
- EMI filters: they cancel any surges and voltage peaks, very useful for electronic equipment (not present in all models).
The UPS, in essence, store energy in the batteries as long as they remain connected to the power grid. When this fails, within a few milliseconds the batteries come into operation, which allow the connected devices to remain in operation for a limited time, usually no more than 10 minutes. This time is normally enough to turn off the device properly, or in case of power failure due to overload to turn off what caused the disconnect and continue the session normally.
The calculation of the power is rather simple, first of all you have to try to have in mind the consumption of the equipment that we want to connect, making the sum.
The only difficulty we encounter at this stage is the different units of measurement, W (Watt) reported on the label on all electrical devices, while the UPS express the power in VA (Voltampere).
I have a device that I want under UPS that indicates in the 500W. Which size should I bet on?
500W / 0,7 = 715 VA
The required group will have a minimum power of 715 VA. Obviously in this case to get to have the stated timing guaranteed you will always have to opt for the largest measure. In this case then at least an 800VA. Abound, as opposed to underestimating, will only bring advantages. With the same costs and functions, always choose the most performing UPS!
The basic function of a Uninterruptible Power Supply Group is to continue with the power supply even in the event of a power outage. Some groups, however, have filters, which cancel out any power surges. This function is excellent for any electronic equipment.
In these cases, a truncation of the energy emission by the meter is simply verified. The greatest danger is that disallowing a device in full working power could cause damage to its circuits.
Very different are the power grid blackouts, due to different electrical phenomena, these in most cases are accompanied by voltage fluctuations potentially fatal for everything that is connected to the network. In these cases filters can really save us! In case therefore we want the protection of the devices we look in the description for the word “Line-interactive”.
Electrical sockets available
UPS for 3D printing.
Many are the cases in which the motherboard does not turn on after a blackout, or maybe it turns on but has anomalies given by the malfunction of the outputs. It’s easy to burn only the exits that were affected by the passage of energy in large quantities. This however makes the card equally unusable and forces us to change it. So we should think of a Group with EMI filters.
Calculate the required power
Simply multiply the nominal power in Ampere by the voltage used and we will see the Watts.
As an example we can always take our dear Ender 3. 15A power supply with a current at 24V = 15 x 24 = 360W. Same goes for every other power supply. Not only for printers, this method applies to any other electrical and electronic device.
So as mentioned above to find the necessary Voltampere :
360W / 0,7 = 514 VA
It goes without saying that you have to add to the calculation any device we want to protect (PC, Access point, modem, external HDD etc).
What Continuity Group to choose
Gruppo da 1500 VA, sufficiente per ogni stampante in commercio. Questi UPS molto economici hanno un limite di erogazione fisico, posto intorno ai 900W, per cui, se sotto stress, per esempio una stampante ed un PC gaming collegati insieme potrebbe non reggere quanto dovrebbe. Un punto a favore però è la protezione dai sovraccarichi e cortocircuiti.