Proprietary 7-step core ensures safe, efficient, and maintenance-free indoor distribution.
Automated 45° full-mitered stacking reduces magnetic flux leakage at joints, lowering no-load loss by 3–5% and excitation current by ~30% versus industry-standard 3-step cores, while minimizing audible noise at source.
Self-developed vertical pouring molds enable self-leveling epoxy flow on winding top surfaces, eliminating voids and achieving optical-grade finish that enhances dielectric strength and prevents moisture ingress.
Proprietary brass rod-to-flat aluminum conductor jointing eliminates ternary solder wire, reducing interfacial resistance and thermal aging risk for extended winding life under cyclic loading.
Custom-formed core clamps simplify assembly and dampen magnetostrictive vibration, achieving sound pressure levels below IEC limits without external acoustic enclosures.
Oil-free construction meets F1/E2/C2 fire classification, eliminates spill containment requirements, and reduces OPEX by >60% through sealed, maintenance-free design validated for -40°C to +120°C ambient ranges.
No-load loss measured per IEC 60076-1 on every unit; test reports reference actual core batch data confirming 7-step stacking advantage over catalog values based on 3-step benchmarks.
Partial discharge <10pC at 1.5Um confirmed via induced voltage test; visual inspection documents mirror-finish surface quality as proxy for void-free encapsulation.
AN/AF temperature rise tested at rated and 140% overload; hotspot margins documented to validate fan-assisted capacity uplift without insulation degradation.
Sound pressure level measured at 0.3m per IEC 60076-10; low-noise clamp effectiveness verified against baseline 3-step core units of same rating.
| Rated Capacity | Voltage Combination | Vector Group | No-Load Loss(w) | Load Loss | No-Load Current (%) | Short Circuit Impedance (%) | ||
| (kVA) | ||||||||
| High Voltage（kV) | Tapping Range | Low Voltage (kV) | ||||||
| 30 | 6 6.3 6.6 10 10.5 11 |
±5% ±2×2.5% |
0.4 | Dyn11 or Yyn0 | 190 | 710 | 2.4 | 4 |
| 50 | 270 | 1000 | 2.4 | |||||
| 80 | 370 | 1380 | 1.8 | |||||
| 100 | 400 | 1570 | 1.8 | |||||
| 125 | 470 | 1850 | 1.6 | |||||
| 160 | 550 | 2130 | 1.6 | |||||
| 200 | 630 | 2530 | 1.4 | |||||
| 250 | 720 | 2760 | 1.4 | |||||
| 315 | 880 | 3470 | 1.2 | |||||
| 400 | 980 | 3990 | 1.2 | |||||
| 500 | 1160 | 4880 | 1.2 | |||||
| 630 | 1350 | 5880 | 1 | |||||
| 630 | 1300 | 5960 | 1 | 6 | ||||
| 800 | 1520 | 6960 | 1 | |||||
| 1000 | 1770 | 8130 | 1 | |||||
| 1250 | 2090 | 9690 | 1 | |||||
| 1600 | 2450 | 11730 | 1 | |||||
| 2000 | 3050 | 14450 | 0.8 | |||||
| 2500 | 3600 | 17170 | 0.8 | |||||
| 1600 | 2450 | 12900 | 1 | 8 | ||||
| 2000 | 2050 | 15890 | 0.8 | |||||
| 2500 | 3600 | 18890 | 0.8 | |||||
Oxygen-free copper for maximum efficiency and short-circuit withstand, or EC-grade aluminum with proprietary brass-rod joints for cost optimization; both validated for mirror-finish casting adhesion and thermal cycling endurance.
Natural air convection (AN) for units ≤200kVA or low-loss profiles; forced-air fans (AF) with thermostatic control for higher capacities or overload requirements; optional redundant fan sets and alarm contacts for N+1 redundancy in critical facilities.
Bare coil for clean indoor switchgear rooms; IP20 ventilated steel enclosure for general indoor use; IP23D stainless steel weatherproof housing with anti-condensation heaters for outdoor/sheltered deployment.
Off-circuit tap changer (±2×2.5% standard) for fixed-ratio 6kV applications, or on-load tap changer (OLTC) for sites with significant voltage fluctuation; custom tap ranges and step voltages available to match local 6kV grid codes.
Embedded PT100 sensors in LV coils and core clamps with Modbus/IEC 61850 outputs for BMS integration; optional fan runtime counters, insulation resistance monitors, and third-party thermostat brands per client specification.
Custom dimensions to fit existing 6kV switchgear footprints; RAL color matching for architectural coordination; bilingual nameplates with QR codes linking to digital manuals, test certificates, and spare parts lists.
No-load and load losses optimized to exceed IEC 60076-20 Tier 2 or client-specific efficiency targets; custom loss guarantees backed by actual core batch test data rather than catalog averages.
Tell us your project requirements—voltage level, environment, grid code, or delivery timeline—and we’ll provide a compliant, optimized solution.
EN