Three Phase Online UPS
Purevolt India manufactures three phase online UPS systems from 10 KVA to 500 KVA. True online double conversion with zero transfer time. Pure sine wave three phase output. Generator compatible. Built for hospitals, data centres, banks, ATMs, and mission-critical industrial applications. ISO 9001 certified.
Three Phase Online UPS
Large offices, hospitals, data centres, banks, and manufacturing units run on three phase supply with loads that a single phase UPS cannot handle. A three phase online UPS covers that range. It keeps your entire high-power infrastructure on clean, battery-backed three phase power at all times. No transfer time on mains failure. No voltage fluctuations reaching your equipment. No harmonic disturbances from the grid getting through.
Purevolt manufactures three phase online UPS systems from 10 KVA to 500 KVA using true online double conversion technology. Built at our Okhla, Delhi facility. ISO 9001 certified. Exported to hospitals, banks, and industrial plants in over 60 countries since 1995.
Why Mission-Critical Three Phase Loads Need Online UPS
A data centre, hospital, bank, or manufacturing plant cannot afford any unplanned power event. Here is what those events actually cost when there is no UPS protection.
Data Loss Is Instant and Often Unrecoverable
A server going down mid-transaction does not just inconvenience users. It can corrupt database tables, lose financial records, invalidate audit logs, and trigger regulatory problems. RAID arrays and backup systems do not help when the server loses power during a write operation. An online UPS prevents the event from reaching the server at all.
Hospital Equipment Cannot Tolerate Any Gap
Ventilators, infusion pumps, patient monitors, and surgical equipment all require uninterrupted power. A 20 millisecond break, which is all an offline UPS prevents, is long enough to trigger alarms and restart sequences on sensitive medical electronics. Only true online UPS with zero transfer time provides the level of continuity these applications require.
Industrial Downtime Is Extremely Expensive
A production line that stops unexpectedly wastes material in process, requires machine re-initialisation time, and often produces scrap from the batch in progress. For CNC machines and injection moulding units, a power interruption mid-cycle means the part is ruined and the machine needs to restart from the beginning. One incident can cost more than the UPS itself.
Grid Power Quality Is Getting Worse, Not Better
Increased penetration of variable renewable energy on the grid, combined with growing non-linear industrial loads, means harmonic disturbances and voltage transients are increasingly common even in commercial areas. A three phase online UPS completely regenerates the output power, so grid quality changes never reach your critical load.
How a Three Phase Online UPS Works
True double conversion. Three phase input is converted to DC, which feeds the battery bank and powers the inverter. Three phase output is regenerated fresh from the inverter at all times.
Three Phase Rectifier Converts Input to DC
The three phase mains input goes into a rectifier with active power factor correction. The rectifier converts AC to DC. This DC simultaneously charges the battery bank and feeds the inverter. Your load never draws directly from the mains.
Inverter Regenerates Clean Three Phase Output
The inverter takes DC from the battery bank and generates a fresh, clean three phase 400V AC sine wave output with less than 3 percent THD. Output frequency is crystal-controlled at 50 Hz plus or minus 0.01 percent. This is what your equipment runs on at all times.
Mains Failure Has Zero Effect on the Load
When the three phase mains fails, the inverter continues drawing from the battery bank and generating the same clean output. No transfer, no relay click, no interruption. The load does not see the event at all. The UPS alarm notifies the operator while the load continues normally.
Static Bypass for Servicing
The static transfer switch can bypass the inverter and connect the load directly to mains in milliseconds for maintenance or overload situations. This is controllable from the UPS panel or remotely via the SNMP interface. Normal operation resumes automatically once the bypass condition is cleared.
Three Phase Online UPS Specifications
| Specification | Details |
|---|---|
| Capacity Range | 10 KVA to 500 KVA |
| Phase Configuration | Three Phase In, Three Phase Out (also 3Ph In, 1Ph Out available) |
| Technology | True Online Double Conversion |
| Input Voltage | 380V / 400V / 415V AC three phase (wide input window) |
| Output Voltage | 380V / 400V / 415V AC three phase ±1% |
| Output Frequency | 50 Hz ±0.01% (crystal controlled) |
| Transfer Time | Zero (true online, no switchover) |
| Output Waveform | Pure sine wave, less than 3% THD at full load |
| Inverter Efficiency | 92% and above |
| Crest Factor | Greater than 4:1 |
| Backup Time | Configurable; up to 8 hours with extended battery bank |
| Generator Compatible | Yes. Wide input window and active PFC handle DG set output. |
| Communication | RS 232C; optional SNMP for remote monitoring |
| Certifications | ISO 9001:2008 certified; tested by reputed testing agencies |
Features of Purevolt Three Phase Online UPS
- True online double conversion. Zero transfer time on three phase mains failure.
- Pure sine wave three phase output. Less than 3% THD at full load.
- IGBT-based inverter with efficiency above 92%
- Active power factor correction. High input power factor, low input harmonics.
- Crystal-controlled output frequency at 50 Hz ±0.01%
- Generator compatible. Wide input window handles DG set output.
- Backup time configurable up to 8 hours with extended battery bank
- Intelligent float-cum-boost battery charger for longer battery life
- Static bypass switch. Maintenance without load interruption.
- Available in standalone, hot standby, and parallel redundant configurations
- RS 232C and optional SNMP remote monitoring interface
- ISO 9001 certified manufacturing. All units tested before dispatch.
Where Three Phase Online UPS Is Used
High power three phase applications where downtime is not acceptable and power quality directly affects operations, safety, or data integrity.
Countries We Export Three Phase Online UPS To
ISO 9001 certified. Exported to hospitals, banks, and industrial plants across Africa, the Middle East, Asia, and Europe since 1995.
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