Models and Specifications
Figures below are taken from product manuals and test documentation, not from marketing literature. Project-specific values are confirmed at technical review.
Common to All Models
| Operation | Passive — no electronics, no control algorithm, no moving parts in the transformer |
|---|---|
| Transformer | PECO Harmonic Energy Recycling Transformer, zig-zag autotransformer |
| Winding architecture | Full zig-zag main winding + reverse auxiliary winding, tied at both ends · Korean Patent 10-2546570 |
| Zig-zag transition points | Nine (conventional arrangements have six) |
| Configuration | Three-phase, three-wire (system neutral not connected to the unit) |
| Voltage difference | Fixed 4 %, no tap changing · Output ≈ Input × 0.96 |
| Rated input voltage | 380 / 400 / 415 / 440 / 480 VAC |
| Input tolerance | ±7 % |
| Rated frequency | 50 Hz (60 Hz to destination market requirements) |
| Insulation class | H · allowable winding temperature 130 °C |
| Cooling | AN (air natural) |
| Installation | Indoor |
| Enclosure protection | IP 42 |
| Control circuit voltage | 220–240 V |
| Operating modes | Saving / By-pass via automatic transfer switch |
100 to 3,000 kVA
| Rating | Configuration | TÜV SÜD assessed |
|---|---|---|
| 100 – 250 kVA | ATS Type | ✓ |
| 300 – 700 kVA | ATS Type / ATS & ACB Type | ✓ |
| 800 – 1,500 kVA | ATS Type / ATS & ACB Type | ✓ |
| 1,600 – 3,000 kVA | ATS & ACB Type / project-specific | ✓ |
39 models across the range are covered by the TÜV SÜD attestation. Units below 100 kVA are built to order; certification scope is confirmed per project.
Verified Figures
Values below are taken from the product manuals supplied with individual units.
Efficiency, measured
| Rating | 50 kVA* | 150 kVA | 200 kVA | 300 kVA |
|---|---|---|---|---|
| Transformer efficiency | 99.7 % | 99.83 % | 99.8 % | 99.8 % |
| System net weight | 212 kg | 332 kg | 452 kg | 512 kg |
* 50 kVA is built to order and is outside the standard range.
Transformer ratings, dimensions and weights
| Rating | Rated current at 415 V | Transformer W × D × H (mm) | Transformer weight |
|---|---|---|---|
| 300 kVA | 417.36 A | 480 × 400 × 460 | 180 kg |
| 500 kVA | 695.60 A | 510 × 420 × 490 | 252 kg |
| 600 kVA | 834.72 A | 510 × 420 × 520 | 269 kg |
| 800 kVA | 1,112.96 A | 510 × 420 × 590 | 319 kg |
| 1,000 kVA | 1,391.21 A | 570 × 430 × 600 | 356 kg |
| 1,200 kVA | 1,669.45 A | 580 × 430 × 620 | 365 kg |
| 1,500 kVA | 2,086.81 A | 580 × 430 × 690 | 489 kg |
| 2,000 kVA | 2,782.41 A | 600 × 450 × 740 | 502 kg |
| 2,500 kVA | 3,478.01 A | 630 × 450 × 840 | 596 kg |
| 3,000 kVA | 4,173.62 A | 640 × 460 × 900 | 652 kg |
Transformer dimensions and weights are for the core component only. Enclosure dimensions and system weights are given below. Values for ratings below 300 kVA are provided at technical review.
Weights and dimensions are indicative. Actual values vary with rated voltage and winding configuration, and are confirmed for the specific unit at project stage.
Transformer efficiency is typically 99.8 % or higher
Measured values across the models above range from 99.7 % to 99.83 %. Figures for a specific model are provided at technical review, and the value for the individual transformer supplied is stated in its product manual.
Two things keep efficiency where it is. The winding architecture — a main and a reverse auxiliary winding tied at both ends — adds very little resistance to the series path. And in an autotransformer with a 4 % voltage difference, only a small fraction of the throughput power is magnetically transformed; the remainder passes through conductively.
The transformer is therefore light for its rating. A 300 kVA unit weighs 180 kg, where a two-winding transformer of the same throughput would weigh several times more.
Enclosure Dimensions
Indicative dimensions for space planning. Final dimensions are confirmed per project.
| Rating | ATS Type (W × D × H mm) | ATS & ACB Type (W × D × H mm) |
|---|---|---|
| 100 – 150 kVA | 600 × 700 × 1500 | 600 × 700 × 2000 |
| 200 – 250 kVA | 800 × 800 × 1500 | 800 × 800 × 2000 |
| 300 – 700 kVA | 800 × 1400 × 1500 | 800 × 1400 × 2000 |
| 800 – 1,000 kVA | 800 × 1600 × 1500 | 800 × 1600 × 2000 |
| 1,200 – 1,500 kVA | 900 × 1600 × 1700 | 900 × 1600 × 2200 |
| 2,000 kVA | 1,000 × 1600 × 1700 | 1,000 × 1600 × 2200 |
| 2,500 – 3,000 kVA | 1,000 × 1800 × 1700 | 1,000 × 1800 × 2200 |
Dimensions exclude eyebolts and wheels. Enclosure footprint is adapted to the practice of the destination market and may differ from the values above. Clearance is required at front and rear for door operation, inspection and ventilation.
Installation Environment
| Installation type | Indoor |
|---|---|
| Enclosure protection | IP 42 |
| Dust protection | Silicone door gaskets · exhaust vent with protective cap · IP 62 filter · metal cable glands |
| Ventilation | Standard electrical switchgear room ventilation |
| Storage climate class | 1K3 |
| Storage temperature | −25 °C to +55 °C |
| Relative humidity | < 95 %, non-condensing |
| Atmospheric pressure | 70 – 106 kPa |
| Surface | Flat, with adequate load-bearing capacity |
| Clearance | Front and rear, for door operation and inspection |
| Enclosure steel | 3.2 T frame · 2.3–3.2 T doors and side panels · 1.6–2.0 T additional plates |
| Enclosure colour | Munsell N1.5 |
| Phase colour coding | European standard — L1 brown, L2 black, L3 grey |
Installation must be carried out by qualified electrical personnel.
Warranty and Maintenance
- Harmonic Energy Recycling Transformer
- 3 years
- Switching and protection components
- 1 year
- Consumable parts
- None
- Firmware or software
- None
Warranty periods run from the date of installation.
Routine attention consists of visual inspection, keeping the enclosure and ventilation clear, checking bolted joints, confirming the fan responds to its thermostat setting, and verifying input and output voltages. Intervals follow the facility’s own electrical maintenance policy.
Warranty excludes damage from electrical overload, unauthorised disassembly or modification, physical damage, natural disasters and user negligence. Full terms are provided in the product documentation.
Documentation Provided at Project Stage
The following are not published on this website and are provided to qualified customers and project partners after technical review:
- Internal wiring diagrams
- Control circuit drawings
- Detailed winding ratios and terminal arrangements
- Manufacturing drawings
- Project-specific drawings
- Installation and operating manuals
Customer project reports and verification results are confidential and are not published under any circumstances.
Confirming the Right Rating
Selection depends on transformer rating, maximum load current, voltage, frequency and load composition. Send your single-line diagram and transformer rating, and we will confirm suitability before proposing anything.