Automated 7-step core and mirror-finish casting enable 150% overload capacity and maintenance-free MV operation.
Fully intelligent shearing and stacking line eliminates manual lamination variability, achieving 5dB lower noise and 5% lower no-load loss versus conventional processes, while 7-step 45° mitering further reduces excitation current by ~30%.
Optimized AF cooling design validated for continuous 150% rated load operation with documented hotspot margins per IEC 60076-12, ideal for peak shaving and emergency backup in 20kV/22kV networks.
Mirror-finish self-leveling casting prevents surface cracking and moisture ingress; high insulation level and lightning impulse withstand exceed IEC 60076-11 requirements for 20kV/22kV surge environments.
Optimized core geometry and high-density epoxy formulation reduce overall size and weight versus equivalent oil-filled units, enabling direct load-center installation in space-constrained urban substations.
F1/E2/C2 fire classification meets NFPA 70E and local building codes; oil-free construction eliminates spill containment, reducing OPEX by >60% versus oil-filled equivalents while ensuring explosion-proof operation.
No-load loss and noise measured per IEC 60076-1 on every unit; test reports reference actual automated-line batch data confirming 5% loss and 5dB noise advantage over manual lamination baselines.
Partial discharge tested at 1.5Um; visual inspection documents mirror-finish surface as proxy for void-free encapsulation; induced voltage and lightning impulse tests confirm dielectric coordination for 20kV/22kV systems.
AN/AF temperature rise tested at rated and 150% overload; hotspot measurements verify compliance with IEC 60076-12 emergency loading guidelines without insulation degradation.
Units carry CE mark for EU market, UL listing for North America, and CCC for China; all tests performed in CNAS-accredited lab with reports traceable to IEC 60076-11, GB/T10228, and GB20052-2024.
| 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) | |||||
| 50 | 345 | 1180 | 2.4 | |||||
| 100 | 15 | ±5% | 0.4 | Dyn | 545 | 1910 | 2.2 | |
| 160 | 20 | ±2×2.5% | 11 or | 682 | 2780 | 1.8 | ||
| 200 | 22 | Yyn0 | 745 | 2820 | 1.8 | |||
| 250 | 855 | 3280 | 1.6 | |||||
| 315 | 980 | 3910 | 1.6 | 6 | ||||
| 400 | 1165 | 4640 | 1.4 | |||||
| 500 | 1365 | 5550 | 1.4 | |||||
| 630 | 1545 | 6550 | 1.2 | |||||
| 800 | 1775 | 910 | 1.2 | |||||
| 1000 | 2090 | 9370 | 1 | |||||
| 1250 | 2410 | 11050 | 1 | |||||
| 1600 | 2820 | 13300 | 1 | |||||
| 2000 | 3280 | 15690 | 0.8 | |||||
| 2500 | 3910 | 18550 | 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 150% overload thermal cycling.
Natural air convection (AN) for units ≤200kVA or low-loss profiles; forced-air fans (AF) with thermostatic control for 150% overload capability; 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 in coastal or industrial zones.
Off-circuit tap changer (±2×2.5% standard) for fixed-ratio 20kV/22kV applications, or on-load tap changer (OLTC) for sites with significant voltage fluctuation; custom tap ranges available to match local 20kV/22kV grid codes.
Embedded PT100 sensors in LV coils and core clamps with Modbus/IEC 61850 outputs for BMS/SCADA integration; optional fan runtime counters, insulation resistance monitors, and third-party thermostat brands per client specification.
Custom dimensions to fit existing 20kV/22kV 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 GB20052-2024 Tier 1 or client-specific efficiency targets; custom loss guarantees backed by actual automated-line 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.
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