Proprietary 7-step core and vacuum casting ensure superior overload capacity and maintenance-free safety.
Performance parameters surpass GB/T10228 and IEC 60076 benchmarks; 7-step core reduces no-load loss by 3–5% versus conventional 3-step designs, directly supporting GB20052-2024 Tier 1 compliance.
Proprietary vertical pouring molds achieve self-leveling mirror finish on winding top surfaces, eliminating voids and ensuring <10pC partial discharge even in humid or corrosive atmospheres.
Sealed epoxy encapsulation blocks moisture, dust, and salt spray; validated for -40°C to +120°C operation and seismic Zone IV resistance without derating.
Optimized AN/AF cooling design sustains 140% continuous overload with hotspot margins documented per IEC 60076-12, ideal for seasonal load swings and emergency backup scenarios.
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.
No-load loss and excitation current measured per IEC 60076-1 on every unit; test reports reference actual 7-step core batch data confirming advantage over catalog values based on 3-step benchmarks.
Partial discharge tested at 1.5Um; visual inspection documents mirror-finish surface as proxy for void-free encapsulation; induced voltage test confirms dielectric coordination for 10kV/11kV surge environments.
AN/AF temperature rise tested at rated and 140% overload; hotspot measurements verify compliance with IEC 60076-12 emergency loading guidelines.
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 international standards.
| Rated Capacity KVA | Voltage Combination | No-Load Loss | Load Loss | ||||
| W | W | ||||||
| High Voltage（kV) | Tapping Range | Low Voltage (kV) | B | F | H | ||
| (100℃)( | (120 ℃)( | 145 ℃) | |||||
| 30 | 6 6.3 6.6 10 10.5 11 |
±5% ±2×2.5% |
0.4 | 105 | 605 | 640 | 685 |
| 50 | 155 | 845 | 900 | 965 | |||
| 80 | 210 | 1160 | 1240 | 1330 | |||
| 100 | 230 | 1330 | 1415 | 1520 | |||
| 125 | 270 | 1565 | 1665 | 1780 | |||
| 160 | 310 | 1800 | 1915 | 2050 | |||
| 200 | 360 | 2135 | 2275 | 2440 | |||
| 250 | 415 | 2330 | 2485 | 2665 | |||
| 315 | 510 | 2945 | 3125 | 3355 | |||
| 400 | 570 | 3375 | 3590 | 3850 | |||
| 500 | 670 | 4130 | 4390 | 4705 | |||
| 630 | 775 | 4975 | 5290 | 5660 | |||
| 630 | 750 | 5050 | 5365 | 5760 | |||
| 800 | 875 | 5895 | 6265 | 6715 | |||
| 1000 | 1020 | 6885 | 7315 | 7885 | |||
| 1250 | 1205 | 8190 | 8720 | 9335 | |||
| 1600 | 1415 | 9945 | 10555 | 11320 | |||
| 2000 | 1760 | 12240 | 13005 | 14005 | |||
| 2500 | 2080 | 14535 | 15445 | 16605 | |||
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 in coastal or industrial zones.
Off-circuit tap changer (±2×2.5% standard) for fixed-ratio 10kV/11kV applications, or on-load tap changer (OLTC) for sites with significant voltage fluctuation; custom tap ranges and step voltages available to match local 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 10kV/11kV 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 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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