Enterprise Classic
A three-phase online UPS for whole facilities — hospitals, plants and critical infrastructure — transformer-based, 20–300 kVA.
- Range
- 20–300 kVA
- Configuration
- Three-phase in / three-phase out (3:3)
- Topology
- Transformer-based true on-line double conversion · output galvanic isolation · multi-CPU digital control
What it is
Enterprise Classic (20–300 kVA) is COMPACT's transformer-based, three-phase online double-conversion UPS for enterprise business continuity — built to keep hospitals, continuous-process industries and critical infrastructure running through the volatile power and site conditions common in India.
A field-proven, rugged range with an individual inverter per output phase, an IGBT inverter stage, multi-CPU (three high-speed microcontrollers) 100% digital control, output galvanic isolation and optional input harmonic-suppression filters.
What it does
Three-phase online double conversion
Continuous regenerated 3:3 output — the load is isolated from raw-mains disturbances.
Output galvanic isolation
Output galvanic isolation for strong performance with unbalanced loads.
Self-diagnosis & event logging
Intelligent self-diagnosis with a historical event log of up to 256 events.
Optional parallel redundancy
Optional parallel redundant (N+1) system.
100% unbalanced load
An individual inverter per output phase supports a fully unbalanced three-phase load.
Generator compatible
Generator-compatible for industrial and commercial loads; intelligent battery charging and management, adjustable charging current 1–30 A.
The engineering value
Field-proven double conversion
A rugged, transformer-based double-conversion design with output galvanic isolation — suited to loads and sites where that physical barrier matters.
Built for Indian conditions
Re-specified by COMPACT — sourced from global manufacturing partners — to handle wide voltage swings, heat, dust and unreliable earthing.
Optional input harmonic filters
Optional input harmonic-suppression filters where the site's harmonic profile calls for them.
Where it fits
Typical applications for this range — not an exhaustive list.
- Hospitals and critical-care environments
- Continuous-process industries and production lines
- Sensitive diagnostic and life-support medical equipment
- Industrial and commercial three-phase facility loads
- Any critical infrastructure requiring conditioned power and backup
Online double conversion with output galvanic isolation
The rectifier feeds the DC bus and battery, the inverter continuously regenerates the three-phase output, and the output passes through a galvanic isolation stage before it reaches the load. A static bypass handles overload and service.
Multi-CPU (three high-speed microcontrollers), 100% digital control governs the power path, with an individual inverter per output phase for 100% unbalanced-load capability.
The rectifier and inverter run continuously, regenerating a clean output. The battery floats on the DC bus, held in reserve — current is always flowing to the load.
Model line-up
Real model designations and capacities transcribed from COMPACT's catalogue.
| Model | Rating |
|---|---|
| 3-3-20 | 20 kVA |
| 3-3-30 | 30 kVA |
| 3-3-40 | 40 kVA |
| 3-3-50 | 50 kVA |
| 3-3-60 | 60 kVA |
| 3-3-80 | 80 kVA |
| 3-3-100 / 300 | 100–300 kVA |
3-3-20
- Rating
- 20 kVA
3-3-30
- Rating
- 30 kVA
3-3-40
- Rating
- 40 kVA
3-3-50
- Rating
- 50 kVA
3-3-60
- Rating
- 60 kVA
3-3-80
- Rating
- 80 kVA
3-3-100 / 300
- Rating
- 100–300 kVA
Model list as printed in the Enterprise Classic 3:3 catalogue. Two cabinet sizes are used (430 × 830 × 1100 mm and 720 × 690 × 1400 mm); the sales team maps the cabinet and per-model dimensions to a specific configuration.
Technical specification
Transcribed from COMPACT's product catalogue.
| Input | |
|---|---|
| Phase | 3-phase 380 / 400 / 415 VAC + N + E |
| Voltage range | 380 / 400 / 415 V ± 25% |
| Frequency | 50 Hz ± 5% (47.5–52.5 Hz) |
| Power factor | 0.92 with filter |
| Soft start | 0 → 100% in 5 s |
| Output | |
| Phase | 3-phase + N + E |
| Voltage / regulation | 380 / 400 / 415 V, ± 1% |
| Frequency synchronisation | 50 Hz ± 5% (47.5–52.5 Hz); battery mode 50 Hz ± 0.05% |
| Power factor | 0.8 / 0.9 / unity variants |
| Waveform | Pure sine wave |
| THD | < 3% linear load; < 5% non-linear load |
| Crest factor | 3 : 1 |
| Efficiency (AC–AC) | 91–94% |
| Transient recovery time | < 10 ms |
| Overload | 125% for 10 min; 150% for 1 min |
| Battery & system | |
| DC system voltage | 360 V DC (30–34 settable) |
| Float charge voltage | 405 V DC |
| DC shutdown voltage | 315 V DC |
| Charging current | 1 A – 30 A adjustable |
| Recharge to 100% | 8–10 hrs |
| Short circuit | Cuts off both inverter and bypass outputs |
| Thermal | Internal thermal switch → transfer to bypass |
| Communications | Standard RS-232; optional SNMP; optional parallel port for N+1 |
| Environmental | |
| Operating temperature | 0–40 °C |
| Humidity | 30–90% |
| Noise | 55–70 dB; forced-air cooling |
| Indicators | LED / LCD panels |
Input
- Phase
- 3-phase 380 / 400 / 415 VAC + N + E
- Voltage range
- 380 / 400 / 415 V ± 25%
- Frequency
- 50 Hz ± 5% (47.5–52.5 Hz)
- Power factor
- 0.92 with filter
- Soft start
- 0 → 100% in 5 s
Output
- Phase
- 3-phase + N + E
- Voltage / regulation
- 380 / 400 / 415 V, ± 1%
- Frequency synchronisation
- 50 Hz ± 5% (47.5–52.5 Hz); battery mode 50 Hz ± 0.05%
- Power factor
- 0.8 / 0.9 / unity variants
- Waveform
- Pure sine wave
- THD
- < 3% linear load; < 5% non-linear load
- Crest factor
- 3 : 1
- Efficiency (AC–AC)
- 91–94%
- Transient recovery time
- < 10 ms
- Overload
- 125% for 10 min; 150% for 1 min
Battery & system
- DC system voltage
- 360 V DC (30–34 settable)
- Float charge voltage
- 405 V DC
- DC shutdown voltage
- 315 V DC
- Charging current
- 1 A – 30 A adjustable
- Recharge to 100%
- 8–10 hrs
- Short circuit
- Cuts off both inverter and bypass outputs
- Thermal
- Internal thermal switch → transfer to bypass
- Communications
- Standard RS-232; optional SNMP; optional parallel port for N+1
Environmental
- Operating temperature
- 0–40 °C
- Humidity
- 30–90%
- Noise
- 55–70 dB; forced-air cooling
- Indicators
- LED / LCD panels
Consider alongside
80–500 kVAEnterprise Classic
Three-phase online double-conversion UPS with an IGBT rectifier and DSP control — 80–500 kVA.
10–80 kVAEnterprise YD Series
Vertical-modular, DSP-controlled three-phase online UPS engineered for data-centre-grade RAS.
Up to 300 kVAPrecision Power Conditioner (PPC)
Solid-state precision voltage conditioning — no moving parts, correction in under 20 milliseconds.
Batteries
SMF, tubular and lithium-ion battery banks, sized and maintained to your backup requirement.
Talk to us to uncover the hidden problems
Tell us the load, the site and the supply. COMPACT's pre-sales team will confirm whether Enterprise Classic is the right fit — and flag anything else the site needs that a spec sheet alone would miss.