What Is Online Ups (Egypt)

What Is Online Ups (Egypt)

Online UPS

The Online UPS, consisting of a rectifier, battery, and inverter, is directly connected to both the AC mains and the load. The rectifier circuit converts the AC power into DC power, which is used to charge the battery and supply the inverter circuit that powers the load. The transfer switch is always in the ON position, allowing power to be continuously delivered to the load from the rectifier and inverter circuits, without any interruptions in case of a power outage.

Benefits of Online UPS

• One of the significant advantages of using Online UPS is that there is no need to switch between the two power paths during a power outage, thus ensuring that power is continuously delivered to the load.
• Another benefit is that Online UPS provides proper isolation between the load and input circuits, resulting in distortion-less signals.
• Since the inverter is always in the ON position, power is continuously available to the load, resulting in zero transfer time.

Drawbacks of Online UPS

• Designing an Online UPS is complex, as it requires a large heat sink.
• The instantaneous supply of power to the battery backup and inverter circuit in Online UPS leads to increased power dissipation.
• The cost of designing Online UPS is higher than that of Offline UPS.

Offline UPS

The Offline UPS functions by directly providing the AC power to the device connected to the load. During normal operation, the AC power is supplied directly to the load, while the battery is charged with the help of the rectifier circuit.

However, in the event of a power outage, the Offline UPS switches the position of the transfer switch to connect the load to the battery backup path. The charged battery then supplies DC power to the inverter, which converts it into AC and supplies it to the load terminal.

Benefits of Offline UPS

• One significant advantage of the Offline UPS is its low design cost in comparison to the Online UPS.
• The internal control of the Offline UPS is simple, as there are only two paths, which work at different times according to the position of the transfer switch.
• The efficiency of the Offline UPS is high because the battery backup and inverter are not always ON, as they are in the case of the Online UPS.

Drawbacks of Offline UPS

• The electric signal obtained from the Offline UPS has poor quality because the inverter is not always ON.
• In case of power outage, the transfer time is approximately 5ms, during which there will be no output power. There will be a slight disruption in the output power due to transfer time.
• Since the Offline UPS directly supplies AC power when it is available, any spikes or surges present in the input voltage will also be transmitted to the output circuit.

FAQ-

What is online UPS used for?

Online UPS takes the incoming AC mains supply and converts it to DC which feeds the battery and the load via the inverter. If the mains supply fails, then the batteries feed the load via the inverter with no interruption to the output supply at all.

What is the difference between UPS online and UPS backup?

UPS backup supplies mains power normally, then switches fast to inverter power from battery. UPS On Line supplies power from the battery all of the time. The mains runs the battery charger. The battery just floats until the mains fail.

What is UPS online mode?

Online UPS systems

Online UPSs are often called 'double conversion' types because incoming power is converted once to DC, for the battery, and then back to AC before reaching the load – which is therefore well-insulated from the mains.

Is online UPS expensive?

The main difference lies in how they handle power. Online UPS continuously converts power, while Offline UPS switches to battery mode during a power interruption. Why is Online UPS more expensive? Due to its continuous conversion mechanism and better protection features, Online UPS systems tend to be more costly.

Is online UPS better?

In general, if you have critical equipment that requires a consistent and clean power supply, an online UPS is the best option. However, if you are looking for basic power protection for non-critical equipment, an offline UPS may be sufficient.

What is the disadvantage of UPS?

However some disadvantages of UPS may include : Battery issue not charging. ... Component failure such as Capacitor/diode/fuse issues. ... Connection failure ,,oxidation of battery terminal or on other connection/connectors.

How UPS online works?

The online UPS takes the incoming AC power supply and converts it to DC using a a rectifier to feed the battery and the connected load via the inverter so that no power transfer switches are necessary.

Which type of UPS is better?

Offline UPS, also called standby UPS or battery backup, is a cost-effective choice. Better offline UPS systems switch to battery fast enough to prevent power anomalies and ride out short outages. An offline UPS protects against most spikes, but doesn't maintain perfect power during minor sags and surges.

Which one is better, UPS or an inverter?

UPS units are necessary in applications that demand continuous power during a blackout, but inverters with external batteries are cost-effective when this function is not needed.

What is an online UPS diagram?

The proposed ON-Line uninterruptible power supply (UPS) offers AC voltage regulation on continuity basis which incorporates with the controllable battery charger. The battery used is Lead Acid Type battery. The charge control technique used for battery is constant current charging technique.