W-40KL 40 kVA Low Frequency Online UPS with Isolation Transformer, 3-Phase 380 V Input/Output
| Capacity: | 40 kVA / 32 kW | Topology: | Low frequency, online double-conversion |
| Input / Output: | 380 / 400 / 415 V AC, 3-phase | Input Voltage Range: | 285–485 V AC (Ph-Ph) |
| Input frequency range: | 50 / 60 Hz, ±10% | Isolation transformer: | Built-in output isolation transformer |
| Transfer Time: | 0 ms (mains to battery) | Battery system: | 384 VDC nominal, 32 × 12 V batteries (29–32 adjustable) |
| High Light: | 32KW Low Frequency UPS,40KVA Uninterruptible Power Supply,Isolated Output Transformer UPS |
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At 40 kVA / 32 kW, the W-40KL can cover a defined production area or a larger three-phase control distribution. The UPS has separate main and bypass feeds and an output isolation transformer. It is designed for external batteries, allowing backup duration to be specified for the actual operating load.
When one production area shares a UPS
Grouping several loads simplifies the power arrangement but makes peak demand harder to estimate. Calculate simultaneous operation, including any motors and drives that start together; also decide which machines can stop safely without battery support.
The 40 kVA nameplate does not mean every connected 40 kVA group will operate acceptably under all transient conditions. Review the machine electrical data and the specified overload limits.
W-40KL in industrial projects
Battery configuration
The W-40KL uses an external VRLA battery bank. The nominal system is 384 VDC with 32 × 12 V batteries. The battery quantity can be configured from 29 to 32 batteries, corresponding to 348 / 360 / 372 / 384 VDC.
Charging voltage is adjustable from 395–435 VDC. The manufacturer lists charging-current values of up to 40 A and 5 A at full UPS load. Available charging current depends on UPS loading and the supplied charger configuration. Battery Ah capacity should be selected based on the connected load and required backup time.
Technical specifications
View full technical specifications
Main input
| Nominal input voltage | 380 / 400 / 415 V AC |
|---|---|
| Input voltage range | 165–280 V AC (Ph-N); 285–485 V AC (Ph-Ph) |
| Phase | 3Ph + N + PE |
| Input frequency | 50 / 60 Hz, ±10% |
| Input power factor | ≥0.7 without filter; ≥0.97 with filter |
| Rectifier technology | SCR |
| Input THDi | <50% without filter; <15% with filter |
Static bypass input
| Bypass voltage range | 176–264 V AC (Ph-N); 304–456 V AC (Ph-Ph) |
|---|---|
| Phase | 3Ph + N + PE |
| Frequency tracking range | 50 / 60 Hz, ±10% |
| Generator input | Supported |
| Bypass overload capability | 150–180%: 1 hour to 300 seconds; >180%: 300 seconds |
Output
| Rated capacity | 40 kVA / 32 kW |
|---|---|
| Nominal output voltage | 380 / 400 / 415 V AC, 3Ph + N |
| Output voltage regulation | ±1% |
| Output power factor | 0.8 |
| Output frequency – line mode | (50 / 60) ±0.01 Hz |
| Output frequency – battery mode | (50 / 60) ±0.01 Hz |
| Output waveform | Sine wave |
| THDv – resistive load | ≤2% |
| THDv – nonlinear load | ≤4% |
| Utility-to-battery transfer time | 0 ms |
| Efficiency – line mode | 90% |
| Efficiency – battery mode | 91% |
Inverter overload
| ≤110% | 60 minutes |
|---|---|
| ≤125% | 10 minutes |
| ≤150% | 1 minute |
| >150% | 200 ms |
Rectifier, battery and charger
| Rectifier type | 6-pulse |
|---|---|
| Rated DC voltage | 384 VDC |
| Charging voltage | 395–435 VDC, adjustable |
| Battery type | VRLA sealed lead-acid battery |
| Battery quantity | 32 pcs nominal; 29–32 configurable |
| Battery string voltage | 348 / 360 / 372 / 384 VDC |
| Charging current | Up to 40 A; 5 A at full UPS load (manufacturer-listed values; available current depends on operating load and charger configuration). |
Communication and management
| Communication | RS232, USB, RS485, dry contacts; 1 communication-card slot for optional SNMP card |
|---|---|
| Display | 3.5-inch LCD; optional 7-inch full-color touchscreen |
| Alarm functions | Output overload, utility abnormality, UPS fault, low battery voltage, alarm history |
| Protection | Output short circuit, output overload, overtemperature, low battery voltage, output over/undervoltage, fan failure, surge protection |
| ECO mode | Supported |
| EPO | Supported |
| Power walk-in | Supported* |
| Synchronization controller | Optional* |
| UPS classification | VFI-SS-111 |
| Parallel units | 4 pcs |
Environment and physical data
| Operating temperature | 0–55°C |
|---|---|
| Storage temperature | -25–55°C, excluding batteries |
| Relative humidity | <95%, non-condensing |
| Operating altitude | 0–1500 m at 100% load |
| Acoustic noise | 70 dB at 100% load |
| Protection rating | IP20 |
| Conformal coating | Supported |
| Dust filter | Supported |
| Dimensions | 432 × 821 × 1159 mm (W × D × H) |
| Weight | 278 kg |
Standards referenced in the manufacturer specification
| UPS EMC requirements | IEC/EN 62040-2 |
|---|---|
| EMC immunity test methods | IEC 61000-4-2; IEC 61000-4-3; IEC 61000-4-4; IEC 61000-4-5; IEC 61000-4-6; IEC 61000-4-8 |
| UPS performance | IEC 62040-3 |
| China market references | GB/T 14715-2017; YD/T 1095-2018 |
These references appear in the manufacturer specification and are not, on their own, proof of conformity to a particular standard edition. Please request the relevant test reports or declarations where required.
*Functions marked with an asterisk are configurable options according to the source specification. Specifications are subject to change.
Installation considerations
At this size, include upstream protection and cable voltage drop in the single-line diagram. Check that each phase is loaded appropriately and that the upstream bypass source is compatible.
The enclosure is 432 × 821 × 1159 mm and weighs 278 kg, excluding external batteries. Leave room for the DC cabinet and for access to the separate main and bypass connections.
Request a W-40KL quotation
For a configuration review, send the combined running load in kW or kVA, site input/output voltage, required backup time and any motor starting or generator requirements. We can review the UPS and external battery arrangement against those details.
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See the complete Low Frequency UPS series for other three-phase capacities and configurations.
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