Page 110 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Advantages
It is more efficient and reliable than online ups. This is because the inverter is not on all the time unnecessarily.

It is inexpensive.
The operation is quite simple due to separate paths for the two modes of operation.
Due to non-continuous operation, large heat sinks are not required.
Disadvantages
It is not suitable for critical loads as here mains and load are not electrically isolated from each other.

This sometimes fails in case of power fluctuating conditions.
2 Online UPS:
If you also want the proper and suitable output power, the online type can be a good option for you. In online
types, the inverter can charge batteries and provide output power simultaneously. It means the grid power is
converted into direct current by a rectifier. Then it is converted into alternating current by the inverter section and
is ready to use by consumer loads. This conversion can protect consumer devices from volatile grid voltage.
Online UPS Block Diagram
In online UPS, the load draws power from the battery bank and main power supply simultaneously. Because the
load initially receives electricity from the main power supply but switches seamlessly to the battery backup in the
event of a power outage, the supply delivered to the load is uninterruptible. This is the difference between online
and offline UPSs.

Advantages of On-line UPS:
It offers continuous power flow with complete isolation from the main power supply or grid ac input to the end user,

Constantly uninterrupted electricity is given to the load,

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CITS : E & H - Electronics Mechanic - Lesson 56 - 63