Online UPS systems, built and tested in Pune
True double-conversion topology from 3 kVA to 200 kVA across three series, with single-phase or three-phase output. Zero transfer time, pure sine output held to ±1%, and up to 96% efficiency. Built and load-tested in Pune.
- Capacity range
- 3 kVA – 200 kVA (three series)
- Series
- EPS-1PH · EPS-3PH1PH · EPS-3PH3PH
- Topology
- True double conversion online
- Transfer time
- 0 ms
More views of the Online UPS
Detail 
Terminations 
Installed on site
By rating and configuration
Each of these is a distinct build, not a filter on one page.
3 kVA Online UPS
The smallest unit in the EPS-1PH-SERIES. Single phase in, single phase out, 2.4 kW of real output. Typical duty is a clinic reception, a small server cupboard, a billing counter or a single machine controller. Offered on a 72 V bank (six batteries) or a 96 V bank (eight), which is the choice that sets how much runtime you can add later.
View specs 5 kVA5 kVA Online UPS
Four kilowatts of real output, single phase throughout. This is the band where most small server rooms, dental and diagnostic clinics and two or three machine controllers land. The 192 V configuration is the one to specify if backup time matters, because a higher bus voltage carries more energy for the same amp-hour cell.
View specs 6 kVA6 kVA Online UPS
Four point eight kilowatts on a 192 V bank. The usual reason to move here from the 5 kVA is a load list that has grown past four kilowatts but does not justify stepping up to a three-phase input.
View specs 7.5 kVA7.5 kVA Online UPS
Six kilowatts of real output and the largest single-phase-input unit before the 10 kVA. Suited to a small server room, a lab bench of analysers, or a machine cell where the supply is single phase.
View specs 10 kVA10 kVA Online UPS
The crossover point in the range. Eight kilowatts of real output, and the only rating we build with either input configuration — single phase on a 192 V bank, or three phase on a 240 V bank. Output is single phase in both cases.
View specs 15 kVA15 kVA Online UPS
Twelve kilowatts of single-phase output taken from a balanced three-phase input. Offered on a 240 V bank (twenty batteries) or a 360 V bank (thirty), which is the decision that sets your runtime ceiling.
View specs 20 kVA20 kVA Online UPS
Sixteen kilowatts of single-phase output from a three-phase input, on either a 240 V or a 360 V bank. A common rating for imaging suites, mid-size server rooms and production control infrastructure.
View specs 30 kVA30 kVA Online UPS
Twenty-four kilowatts on a 360 V bank of thirty batteries. From this rating upward the bank is a substantial installation in its own right and the battery room needs planning — ventilation and ambient temperature set the life of the cells more than anything else does.
View specs 40 kVA40 kVA Online UPS
32.0 kilowatts of single-phase output from a three-phase input, on a 360 V bank. The largest ratings in the EPS-3PH1PH-SERIES — at this size we survey the site and issue a general arrangement drawing before quoting.
View specs 50 kVA50 kVA Online UPS
40.0 kilowatts of single-phase output from a three-phase input, on a 360 V bank. The largest ratings in the EPS-3PH1PH-SERIES — at this size we survey the site and issue a general arrangement drawing before quoting.
View specs 60 kVA60 kVA Online UPS
48.0 kilowatts of single-phase output from a three-phase input, on a 360 V bank. The largest ratings in the EPS-3PH1PH-SERIES — at this size we survey the site and issue a general arrangement drawing before quoting.
View specs 80 kVA80 kVA Online UPS
64.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. A floor of CNC, or a mid-size server room with its cooling on the same board.
View specs 100 kVA100 kVA Online UPS
80.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. Where a whole production line or a small data hall sits behind one machine.
View specs 120 kVA120 kVA Online UPS
96.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. Plant-level distribution. At this rating the battery room, not the cabinet, usually sets the layout.
View specs 150 kVA150 kVA Online UPS
120.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. Large plant and multi-line installations, normally fed from a dedicated transformer.
View specs 180 kVA180 kVA Online UPS
144.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. Near the top of the range. Site survey and a general arrangement drawing before we quote, without exception.
View specs 200 kVA200 kVA Online UPS
160.0 kilowatts, three phase in and three phase plus neutral out, from the EPS-3PH3PH-SERIES. The largest standard machine we build. 384 V is available on this rating where the bank layout suits it better.
View specsAnd when it’s the right answer
An online UPS rebuilds the waveform rather than filtering it. Incoming mains is rectified to DC, the DC bus feeds the battery bank and the inverter, and the inverter synthesises a fresh sine wave for the load. The load never sees the mains directly, so voltage dips, frequency drift and disturbance on the incoming supply are absorbed by the rectifier stage instead of reaching the equipment.
That matters in Pune specifically. On the MIDC feeders at Chakan, Bhosari and Ranjangaon the problem is rarely a full outage — it is sag from a neighbouring induction load starting up, and it lasts a few hundred milliseconds. An offline UPS transfers in several milliseconds and a servo stabilizer corrects in tens of milliseconds; an online UPS never transfers at all, because the inverter is already the source.
We build three series. The EPS-1PH-SERIES runs 3 to 10 kVA on a single-phase input with a single-phase output. The EPS-3PH1PH-SERIES runs 10 to 60 kVA, taking a three-phase input and converting it to a single-phase output, which balances the draw across your incoming supply. The EPS-3PH3PH-SERIES runs 10 to 200 kVA, three phase in and three phase plus neutral out, for distribution boards and plant that needs a genuine three-phase supply. All three are true double-conversion: the load runs off the inverter continuously, so transfer time is zero because there is no transfer.
Choose online when the load will not tolerate a break of a few milliseconds, or when the input voltage swings widely. Servers, CNC controllers, medical imaging and PLC racks all fall here.
A stabilizer corrects voltage but gives you no ride-through. If the feeder drops out completely, the load drops with it. Pair the two only where the incoming supply is both dirty and unreliable.
A DG takes eight to fifteen seconds to pick up. The UPS covers that window; the DG covers the hours after it. They are complementary, not alternatives.
Where these get installed
- Server rooms and network cores
- CNC and VMC machine controllers
- Hospital imaging and diagnostic equipment
- PLC and SCADA panels
- Laboratory analysers
- Sugar mill DCS and instrumentation
- Laser cutting machine controllers
Full specification
Typical values for the standard build. Every unit is configured to order — the figures on your general arrangement drawing are the ones that apply.
| Capacity range | 3 kVA – 200 kVA (three series) |
|---|---|
| Series | EPS-1PH · EPS-3PH1PH · EPS-3PH3PH |
| Topology | True double conversion online |
| Transfer time | 0 ms |
| Input — EPS-1PH-SERIES | 1 phase + N, 220 / 230 / 240 VAC, 170–280 V |
| Input — EPS-3PH1PH-SERIES | 3 phase + N, 380 / 400 / 415 VAC, 330–480 V |
| Input frequency | 48 – 52 Hz |
| Input power factor | > 0.90 (PFC) |
| Output configuration | Single phase + neutral + ground |
| Rated output voltage | 220 / 230 / 240 VAC ±1% |
| Output power factor | 0.8 lag |
| Output frequency | 50 Hz |
| Waveform | Pure sine wave |
| THDv | < 3% linear · < 5% non-linear |
| Voltage regulation | ±1% |
| Overload capacity | 110–150%: 30 s · > 150%: 2 ms |
| Efficiency | Up to 96% |
| Battery type | External tubular and SMF |
| Battery voltage | 72 / 96 / 120 / 192 V · 240 / 360 V |
| Charge current | Adjustable 1 A – 12 A |
| Recharge time | < 8 hrs to 90% capacity |
| Battery protection | Over-voltage / under-voltage |
| Operating temperature | 0 °C – 40 °C |
| Humidity | 5% – 95%, non-condensing |
| Communication | RS-232 |
| Protection class | IP20 |
| Cooling | Forced air, variable speed fans |
| Mobility | Heavy-duty caster wheels |
Sectors that buy this
Hospitals & Diagnostics
The load list in a hospital is not one load. Theatres, imaging, ICU and the server room each need a different answer, and the specification has to hold up in an NABH audit.
Data Centres & Server Rooms
Redundancy topology, battery runtime to DG pickup, and heat rejection. At this scale the UPS is the easy part of the specification.
CNC & Machine Shops
A CNC controller that resets mid-cycle scraps the job and can crash the tool. On MIDC feeders that is a voltage problem far more often than an outage problem.
Sugar Mills & Co-generation
The crushing season runs roughly October to April and does not pause. A control-supply trip does not just stop the mill — it strands cane in the carrier and costs hours to restart.
Laser Cutting Machines
A fibre laser source is often the single most expensive component in the workshop, and the supply conditions in its warranty are usually stricter than anything else on your floor.
Online UPS — questions we get asked
Anything not covered here, call us — most of it is faster to answer on the phone.
What is the difference between an online UPS and an offline UPS?
In an online UPS the inverter feeds the load continuously, so there is no transfer at all when mains fails — the specification is 0 ms. In an offline or line-interactive UPS the load runs on filtered mains and switches to the inverter when the supply drops. That break is invisible to a desktop PC but can trip a CNC controller, a medical imaging system or a modern switch-mode supply running near its limit.
What size online UPS do I need?
Work in kilowatts, not kVA. These units are rated at 0.8 power factor, so a 10 kVA machine delivers 8.0 kW and a 60 kVA machine delivers 48 kW. Total the continuous wattage of your load, add roughly 25% for growth and inrush, and pick the model whose kW figure covers it. Our kVA calculator does the arithmetic; for motor loads, send the list instead.
Do these include a built-in isolation transformer?
Not as standard, and that is a choice rather than an omission. The parameter sheets specify double conversion without one; where galvanic isolation is genuinely needed we supply an ultra isolation transformer sized to the load. Building one into every cabinet saves a separate unit, but it adds loss, weight and cost to every machine whether the load calls for it or not, and on a clean earth with no leakage-current concern it earns nothing. Tell us what the load is sensitive to and we will say which of the two you actually need.
Do your online UPS systems give a three-phase output?
Yes — the EPS-3PH3PH-SERIES, 10 kVA to 200 kVA, is three phase plus neutral in and three phase plus neutral plus ground out at 380, 400 or 415 VAC. The other two series output single phase: EPS-1PH from 3 to 10 kVA, and EPS-3PH1PH from 10 to 60 kVA, which converts a three-phase input to a single-phase output and balances the draw on your incoming supply. Between 10 and 60 kVA either output is available, so tell us which the load needs.
How long will the UPS run on battery?
Backup time is set by the battery bank, not the UPS rating. The bank is external on every model — tubular or SMF, on a bus between 72 V and 360 V depending on the machine — and it is sized against the runtime you ask for. Tell us the minutes you need and we quote the bank with the unit.
What input voltage range do these tolerate?
The single-phase series accepts 170 V to 280 V, and the three-phase series 330 V to 480 V, both at 48 to 52 Hz. That is a wide enough window for most Pune industrial feeders without a stabilizer in front — which is one of the practical reasons to choose online over line-interactive here.
Do you manufacture these or import and rebadge them?
We manufacture. Assembly and testing are done at our works in Dhayari, Pune. You are welcome to visit and see a unit before it ships.
Where we supply and attend
Online UPS units are built at our Pune works and delivered, installed and commissioned across the city and the industrial belt around it.
Outside these areas we contract individually against distance, and we will tell you honestly if the response time you need is not one we can hold to. All areas served
After it’s installed
We service what we build, and what everyone else builds too.