FAQs About UPS & Power Inverters
Here are few frequently asked questions with answers regarding UPS and Power Inverters.
Q.1 What is UPS?
UPS is an uninterruptible power supply which is used to provide backup during blackout or brownout. Every large server is secured by connecting UPS.
-Line interactive UPS
-Standby / Offline UPS
-Online UPS
-Pure sine wave UPS
-Modified sine wave / Simulated sine wave UPS
-Square wave UPS
Q.3 What is the difference between an Inverter and UPS?
Inverter is basically a circuit which inverts DC into AC. An equipment which perform this task is also called as Inverter. Every UPS is an inverter but every inverter can not be a UPS.
Q.4 What kind of transformer is used in UPS?
There are two kinds of transformer usually used in UPS, Iron core type and Ferrite core type. Iron core transformer base UPS is less efficient and heavier in weight. UPS with Ferrite core transformer is more efficient and much lighter in weight.
Q.5 How single line wiring works?
In this type of wiring, only live wire is circuited with appliances and neutral is common due to connected ”Input neutral” with neutral of wiring of house.
Q.6 Is single line wiring safe?
Yes, if it is according to the diagram above.
Q.7 How double line wiring work?
Both live and neutral wires are circuited with appliances.
Q.8 Why appliances make noise when running on UPS?
Non pure sine wave current produces humming noise.
Q.9 Is other than pure sine wave current safe?
It is safe if it is not spiky or too much noisy. Noise in current can produce long term effects e.g. decrease in life span of equipment. Noise can also heat up the devices and malfunction them. Voltage spikes can burn the electronic and electrical equipment.
Q.10 What are different wave forms of current?
Stepped sine wave, modified sine wave (simulated sine wave), square sine wave, pure sine wave etc.
Q.11 Why sometimes horizontal lines appear on LCD when it is running on UPS?
Mostly, it is due to the modified sine wave current of uninterruptible power supply.
Q.12 Which type of UPS is more efficient, non pure sine wave or pure sine wave?
Non pure sine wave UPS is more efficient because filtering current to make it pure sine wave decreases efficiency of UPS.
Related Topics:
UPS Problems And Possible Remedies
CyberPower Inverters: Review & Description
My Microtek Intelli Pure Sine Wave 925W E2+ inverter, the red indicator was glowing suggesting to fill the water in the battery. after filling the indicator showing charging battery started glowing, usually it stops after batteries get charged. This time the battery charging indicator is continuously glowing day after day. Cooling fan in riveter is also continuously working. Battery is getting charged backup is OK.
I have cleaned the battery terminals. But what could be the reason for continuously glowing the charging indicator of inverter.
Usually when battery gets weaker, it fails to attain cut off voltage thus inverter charger keeps charging it resulting in battery getting hot. Besides always use distilled water to top up the flooded batteries. Tap water or boiled water can kill the battery earlier than its expected life span.
Dear sir , I have good amaron inverter for my home lighting and fan. But now the problem is that it is not getting on when main power goes out. When I press reset button it is getting on and when i release the button it gets off. What is the problem. Early when it was developing this fault, it used to get on and off intermittently and sometimes behaved normal but now not getting on at all. Is it some relay problem. Please advise
No it might not be the relay problem. There could be some damaged circuit or something. Get it fixed.
why my solar inverter ss 1660 beeps at night?
How to resolve inverter overload problem
Put load which an inverter could afford. Consider starting current of appliances as well.
If I have to disconnect UPS for repair or replacement, what connections are required to run the appliances on normal supply.
My ups battery is new but backup is only 5 minutes
Is UPS still beneficial even if it is not giving backup to the computer..
it depends on your loads.reduce your loads and check.
I had a 2000 watts UPS with a 24 volt backup lead-acid sealed batteries. I connected the batteries to my 24 volt phptovoltaic system to charge batteries using the solar system. Unfortunately, I plugged the UPS to the power outlet without disconnecteing the photovoltaic supply. The UPS faulted. How may I repair the UPS-inverter? Need help please, Thank you.
I have a 348v 400kva ups that is showing inverter protecting on the screen and this prevents it to on.i have isolated IGBTs but the fault remained ,can somebody help me out.
Sir I want to protect my inverter(850VA) which is with a 12v battery against lightning.So what ampere size of MCB should be installed with the inverter input
Buy a surge protector.
Besides proper ground wiring is more important than any such protection devices.
I have done double wiring for input & output of inverter through double pole MCB. Now when I switch off the input MCB, inverter shows low output (170-190V) instead of 230V on Multimeter. What is the cause.
Some modified sine wave inverters are designed to supply that voltage. It rises once you start putting load.
I have a 20 kva delta ups and last night due to power fluctuations it suddenly switched off and is displaying short circuit and is now running on bypass mode. What is to be checked.
Restart and check if function restores.
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