W-20KL 20 kVA Low Frequency Online UPS with Isolation Transformer, 3-Phase 380 V Input/Output
| Capacity: | 20 kVA / 16 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: | 8KW Low Frequency UPS,Self Adaptive Uninterruptible Power Supply,10KVA Low Frequency UPS |
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BLAZING POWER W-20KL is rated 20 kVA / 16 kW, with three-phase input and output and a built-in output isolation transformer. It is a candidate for production support equipment and centralized control loads that need UPS-backed operation. The battery set is external, so the required autonomy is agreed during system design.
A 16 kW limit for real project loads
Production equipment rarely draws the same power throughout a cycle. Before specifying this UPS, compare normal running kW with startup and other short peaks; determine which equipment will run on battery and which can be shed.
The UPS accepts 380, 400 or 415 V nominal three-phase supply. Main and bypass voltages must both be checked because their permitted input ranges are not identical.
Loads commonly considered for the W-20KL
For a production cell, write the backup load schedule first. It prevents the UPS quotation from accidentally including nonessential heating, compressors or other high-inrush equipment.
Battery configuration
The W-20KL 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 | 20 kVA / 16 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 | 89% |
| Efficiency – battery mode | 90% |
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 | 405 × 656 × 817 mm (W × D × H) |
| Weight | 145 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
The 20 kVA cabinet is specified at 145 kg, without the external battery installation. Allow for moving and servicing the cabinet, and plan a separate protected DC route to the batteries.
Coordinate the input and bypass breakers with the upstream panels. Check the site's measured minimum voltage and the proposed generator supply, if present, before commissioning.
Request a W-20KL 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.
Request a QuoteNeed another UPS capacity?
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