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.



Q.2 What are different types of 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.
Circuit_Common_Neutral - Benign-Blog
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.
Circuit_Double_Line-Benign-Blog
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




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