What is an Online UPS?

An online UPS is the one in which the batteries are always connected to the inverter. Therefore, it isn’t necessary to always have a power transfer switch. So, whenever a power loss occurs at that time the rectifier just drops out of the circuit so that the batteries can keep the flow of power just unchanged and steady.

Therefore, when the power is restored then, the rectifier resumes carrying most of the load and also begins charging the batteries. However, the charging current may be limited for preventing the high-power rectifier from overheating the batteries as well as from boiling off the electrolyte.

Online UPS Manufacturers in Delhi, India

Nexus UPS Systems is one of the popular online UPS manufacturers in Delhi, India which provides UPS Online to solve energy disruption problems. Our UPS solutions are designed and developed with double conversion technology. These indigenously manufactured machines are preferred all over India and are known for high performance and high quality standards.

Advantages of Online UPS:

The most beneficial advantage of an online UPS, is its ability to provide an electrical firewall” between the incoming utility power and sensitive electronic equipment in comparison with the other types of UPS.

1. Online UPS basically provides isolation between main supply and load.

2. Inverter is always ON therefore, the quality of load voltage is free from distortion.

3. All the disturbances of supply i.e. blackout, brownouts, spikes etc. won't be there in the output.

4. Voltage regulation will be better.

5. Since inverter is always on therefore, transfer time is practically zero.

Difference between Online UPS and Offline UPS:

Online UPS

The online UPS is always connected to the primary load at all times or until the battery in it gets charged. In this scenario, our electronic device receives the power from online UPS and not directly from the AC main supply. Thus, even when the primary AC fails, our electronic appliances operation need not be stopped. Laptops is one such good example of online UPS. We could use laptops while it is charging, or we could use it later after getting a charge. The online UPS gets the direct AC power supply to it, and in turn, it uses the AC-DC inverter power to the electronic device.

Offline UPS

The Offline UPS need not finds its usage as often as Online UPS. The offline UPS is required only when primary power fails. Yes, obviously, in this case, the electronic appliance gets power directly from the prime AC power supply and not from the UPS. When there is any voltage fluctuation in the primary input power, the offline UPS provides power to electronic appliances. Therefore, these kinds of UPSs are required only during the blackout and not every time.

For example, the desktop computers that we use at our homes or office are primary examples of offline UPS. These computers have a separate UPS unit, and it provides power to the computer only after power failures. The primary required measure is the switching delay. However, an offline UPS is said to work better if it’s capable of switching it in lesser time.

Online UPS Working Principle:

An online UPS uses a ‘double-conversion’ method of receiving AC input, rectifying to DC for passing through the rechargeable battery (or battery strings), then inverting back to 120 V/ 230V AC for empowering the protected appliances.

Online UPS supply power during such events as a blackout, voltage surge, voltage sag, or over-voltage. A double-conversion online (UPS) supplies consistent, clean, and near-ideal power regardless of incoming energy. This UPS converts incoming AC power to DC and then back to AC.

What are the applications of Online UPS?

Online UPS are mainly used in that field/sector, which requires an uninterruptible power supply. The uninterrupted power system mainly performs two functions. i.e., filter disruption of the supply network &, in case of mains failure, provides power to the loads.UPS are used to correct many power problems like;

Voltage sag

Power failure

Voltage spike

Under Voltage

Over Voltage

Frequency variation

Harmonic distortion

Switching transient

Depending upon the applications they are used in different kinds of industries as given below;

1. Data Centers

2. Telecommunication

3. Banks & Insurance companies

4. Healthcare :Clinics & medical institutions

5. Educational Institutions

6. Electrical Equipment

7. Other Industries

1. Data Centers : Data centers is a facility that every organization is using to store, manage & disseminates its data using computing, IT operations & networking equipment. Data Centres are the dedicated space, which is very important for every industry for smooth running daily operational activities as it is a more extensive network of computer systems & hence deals with a considerable amount of data. So, any kind of interruption in power supply would be highly destructive for their work functions. Therefore in order to maintain its proper functionality, Online UPS plays a vital role.

2. Telecommunication Equipment: Online UPS plays a vital role in telecommunication equipment like television, radio, computer system, etc. With online UPS, varied power-related problems can cause damage to these equipments, hence their performance & durability will undoubtedly affect. So in order to avoid operational data damage, these equipments should connect to online UPS as it allows the continuous power supply to them.

3. Banks& Finance Companies: Banks & insurance Companies play an essential role in economic growth & stability. These companies are not limited to only bank branches/ATM’s but due to the intensive use of the internet these days, online banking & mobile banking are also gaining popularity & well accepted by the customers. Power breakdowns or voltage fluctuations can cause damage to the sensitive components of modern data systems in banking & finance companies. So in order to provide customers with continuous access to service & information at high speed & frequency, online UPS are significant.

4. Healthcare: Clinics & medical institutions: In hospitals, clinics & medical institutions, technology is used in various medical devices such as CT scan machines, Radiology equipment, MRI Scan machine, ventilators, Dialysis machine & many more. Theseequipments need continuous & uninterrupted power supply as they all are concerned about the health of the patients.Data centers in the healthcare sector require a reliable contingency power supply system to keep them. A UPS is the critical source of power supply in hospitals or health clinics to safeguard against many power supply issues.

5. Educational Institutions: Schools, colleges & universities are always looking for ways to make student’s life easier. Efficient in terms of technology. Advanced technology is used in these educational institutions for different applications like smart classrooms, Computer labs, security systems, data centers, Biometric systems, etc. Therefore in order to avoid power disruptions & to ensure reliable power backups, Online UPS should be used.

6. Electrical Equipments: UPS is a powerful device to deal with frequent power fluctuations. In most of the electrical types of equipment, it provides a stable power during disturbances & power failure. UPS will save data & also protect the equipment from damage. Power disruptions can cause severe damage in sensitive equipment like programmable microcontrollers, transformers, distribution boards, etc. So UPS systems are a critical device for ensuring proper power supply performance.

7. Other Industries: UPS system becomes an essential part of almost every kind of industry like engineering, manufacturing, IT, BPO, pharmaceuticals, textiles, and chemical industries, process industries as they reduce the risk caused by line transient & harmonic disruptions. Online UPS possess higher levels of reliability & efficiency. All these industries run effectively on online UPS, as disruption in any machine can cause a massive loss of data.

Conclusion: UPS is the abbreviation for Uninterruptible Power Supply, which can be used in different kinds of industries to provide power backup in situations of power system failures or any disturbance & problems. They are the backbone of every operating system as they serve as a mediator between the primary source of power & the device to which power is to be supplied. They can also be used in the sector, where a higher level of power is required.

Excellence From The Assembly Line

nexus ups systems are built to the most exacting quality standards. using High quality components Such as: IGBTs from Eupuc, Germany; MOSFETS from International Rectifiers; Thyristor modules from Infineon & Semikron; Capacitors from Alcon, Epcos & Keltron; Transformers from Bhurji/Trusine and SMF Batteries from Exide/Quanta.

Proven as the best fit for Indian operating conditions, Nexus UPS systems come with a host of unique features that have not only won accolades, but most importantly earned the customers’ trust.

  • Controlled Charger

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    A hi-tech controlled Constant Voltage Constant Current battery charger for enhanced battery life.

  • Overload Protection

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    Electronic Overload Protection designed to enhance the life of your UPS system.

  • Short Circuit Shield

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    Short Circuit Protection, designed to protect your investment in this equipment.

  • Deep Discharge Protection

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    Battery Deep Discharge Protection prevents accidental discharge thus keeping your batteries safe.

  • IGBT Efficiency

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    A highly reliable IGBT based inverter circuit that provides greater efficiency on battery mode.

  • Galvanic Isolation

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    Critical load isolated from spikes, surges, blackouts, brownouts and line noise.

  • 72 HRS. Soak Test

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    Each Nexus UPS system passes through a 72 hour soak test, ensuring minimal failure in the field.

  • Fastest Response

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    Nexus Customer Care has a legendary reputation both in reaction time and customer satisfaction.

A Solution For Every Requirement

Nexus Power System Has One Of The Widest Range Of Power Solutions And On Line Ups Systems With Internal And External Batteries For Upto 12 Hours Back-Up Time

A Wide Customer Base Across Verticals

What Our Customers Say About Us

No matter how much we believe in ourselves and how much talent we bring to our work, our customers are the ones who ultimately determine the quality and value of our services. they acknowledge and appreciate our work. Here is what some of them have to say about our product quality and customer care.

  • "We are using NEXUS Online UPS system for the last five years and we are fully satisfied with Nexus Power Systems delivery, quality of product and services."

    Indian Institute of Technology,

  • “We are using NEXUS UPS systems with SMF batteries. In our opinion NEXUS UPS systems are technically and performance wise very stable and ably supported by efficient service provide by Nexus Power Systems. These systems are highly recommended.”

    United Nations Industrial Development Organization

  • “After researching UPS systems for our Air Force Communication Centre, we found NEXUS product quality and customer support to be head- and shoulders above the field. All our Nexus products have performed flawlessly.”

    Senior Engineer (Communications)
    Air Force Communication Centre - Sena Bhawan

  • “NEXUS UPS systems are installed in National Load despatch Centre and also in the office of Chairman, CEA, Members and Chief Engineer. I am glad to mention that the performance of the NEXUS UPS systems are highly satisfactory and we get a very high level of after sales service support from NEXUS POWER SYSTEMS”

    Deputy Director, Central Electricity Authority,
    Government of India

  • “NEXUS has supplied online UPS with SMF batteries to our office and the same is working without any problem from the date of installation.”

    SO to CC -R&D (LS&HR)
    Defence Research & Development Organization

  • “We are using Nexus Online UPS systems of various ratings and are satisfied with the product & service.”

    Addl. Manager
    BSES Rajdhani Power Limited

  • “We are using NEXUS UPS system for our Research Unit. NEXUS UPS are working absolutely fine and meet our standard fully. The customer service of Nexus with quick response is simply great.”

    Research Office, Central Water Commission

  • “Nexus Power Systems supplied to us are literally guarding our computers very well and we are extremely satisfied with the prompt After Sales Service of Nexus Power Systems.”

    Director General of Civil Aviation
    Technical Centre

Frequently Ask Questions

What is meant by online UPS?    

Online Uninterruptible Power Supply (UPS) charges the battery from the AC's main supply and further supplies power to the load via an inverter. So in times of insufficient power accumulation, there is no interference to the output supply because the battery supports the load via the inverters. The on-line UPS system is suited to sensitive applications. Online UPS takes in all types of frequencies and voltage and converts them into the constant clear flow of AC power.

What are online and offline UPS?    

Offline UPS: Offline UPS provides the AC main supply directly to the load in cases when the AC mains supply is available. In times when there is inadequate power supply, it instantly shifts to the inverter to supply power until the main supply gets back. Off-line Ups power supply is ideal for normal operation as they don't monitor incoming voltage and therefore are not convenient for all the networking systems.

Online UPS: Online UPS differs from Offline Ups because their inverter is always connected to battery hence there is no need for a power transfer switch. Whenever there is a power failure, the inverter immediately disconnects from the circuit and the battery maintains the endless power supply without any interruption. When the power returns the inverter kicks in the circuit and resumes to supply power and charge the battery simultaneously.

What is the advantage of Online UPS over Offline UPS?    

Online UPS provides zero interference to the output load even when the supply fails as there is no transfer to battery power compared to offline UPS because they can compensate over and under power supply without the use of the battery. They manage to provide a consistent and reliable power supply to networks running applications.

Where are Online UPS used?    

Online UPS akin to its name provides an online uninterrupted power supply to the connected loads, which are critical to halt even for a fraction of a second, no matter whether it's a power outage or a brownout. All the power-sensitive electronics loads are a must to be connected to the online UPS. Otherwise, the quality of the power or even a slight surge or a spike could wreak havoc on the equipment and in turn, ruin the entire system it is connected. The downtime itself costs heavily besides rectification charges, and above all, there's nothing to surprise in case the damage gets beyond repair. Therefore, Online UPS are a must everywhere, considering the quality of the power we receive, like –

  • Hospitals and Private Clinics
  • Research Centres and Laboratories
  • Process Industries
  • Computers, Data Centres, Server rooms and Search Data Centers
  • Network operation Centres and Telecommunication Networks
  • Commercial areas with expensive equipment
  • Sensitive House-hold equipment

Which is the best online ups in India?    

When it comes to the best online UPS in India, there are several brands available in India, some are locally manufactured, and some are International brands. With over several years of experience in the power conditioning industry, Nexus UPS is one the most trustworthy and reliable brand with several industry firsts to its credit. Our brilliance in design, tailormade solutions, zero obsolescence, and nationwide terrific support make us the best online UPS in India. Based on the world’s advanced technology to meet the severe environmental and worst power conditions for applications, Nexus UPS offers an extensive range of reliable UPS that meets the need of every individual.

How does an online UPS work?    

An uninterruptible power supply or uninterruptible power source, UPS is an electrical device that offers emergency power to a load when the input power source, typically the utility mains, fails. An online UPS Device is one where the UPS output is always supplying current to the load. This UPS system is an older and cheaper style that only adjusts the UPS output to the load when the prime fails, causing a momentary spike that can rest computers and create restrictions. However, with the online system, the mains uninterruptedly supply charging current to the batteries, and the UPS output is produced from the batteries; therefore, when the mains fail, there is no switching of the output voltage. Such a system also offers extra protection from short circuits and voltage shedding on the mainline.

What is the use of online UPS?    

An Online UPS is typically used to safeguard hardware such as data centers, computers, telecommunication equipment, or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, critical business disruption, or data loss. This online UPS is perfect for environments where electrical isolation is essential or for equipment that is very subtle to power fluctuations.

Is online or offline UPS better?    

Online UPS supplies power from AC mains to the load through the rectifier and inverter combination while the offline UPS directly supplies power from AC mains to the load.


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