Brand: WEJI
Capacity: 2000KVA-240MVA, 30MVA,63MVA,75MVA,120MVA,150MVA
Voltage: 66KV 110KV 220KV
Series: Main Power Transformer
USES: Power plant step-up substations, hub substations, and main step-down substations for large users
A power transformer is a core piece of equipment in a power system, responsible for voltage transformation and power transmission. It is typically installed in power plant step-up substations, hub substations, and large user base main step-down substations, transforming the generator output voltage or the voltage of the upstream power grid to a voltage level suitable for downstream transmission or distribution. WEJI provides 66kV, 110kV, and 220kV power transformers.
66kV Power Transformer
66kV transformers belong to the category of high-voltage power transformers and are mainly used in power transmission and distribution networks at the 66kV voltage level. Their rated frequency is 50Hz, and their capacity ranges from 2000kVA to 100MVA.
In terms of capacity level, 66kV transformers mainly serve the following roles:
Below 30MVA: Main transformers for small and medium-sized substations, main step-down transformers for industrial users;
30MVA～63MVA: Main transformers for urban substations, main step-down transformers for large industrial users;
63MVA～75MVA: Main transformers for large substations, main transformers for new energy step-up substations;
The 110kV main transformer is the most common voltage level in urban power grids and industrial user substations, and it also serves as a watershed in the power system’s transmission and distribution network. Common 110kV power transformer capacities include: 6300kVA, 8000kVA, 10000kVA, 12500kVA, 16000kVA, 20000kVA, 25000kVA, 31500kVA, 40000kVA, 50000kVA, and 63000kVA.
| Rated capacity (kVA) | high Voltage (kV) | Tap range | low voltage (kV) | Connection Group | No‑load loss (kW) | Load loss (kW) | No‑load current (%) | Impedance voltage(%) |
| 2000 | 60 63 66 | ±8×1.25% | 6.3 6.6 10.5 11 | YNd11 | 1.8 | 14.7 | 0.3 | 8.0 |
| 2500 | 2.1 | 17.4 | 0.3 | |||||
| 3150 | 2.4 | 20.7 | 0.3 | |||||
| 4000 | 3.1 | 24.6 | 0.3 | |||||
| 5000 | 3.7 | 27.6 | 0.3 | |||||
| 6300 | 4.4 | 30.8 | 0.3 | |||||
| 8000 | 5.3 | 36.5 | 0.3 | |||||
| 10000 | 6.2 | 43.0 | 0.3 | |||||
| 12500 | 7.4 | 51.1 | 0.3 | |||||
| 16000 | 8.9 | 62.8 | 0.3 | |||||
| 20000 | 10.6 | 76.1 | 0.3 | 9.0 | ||||
| 25000 | 12.5 | 90.0 | 0.3 | |||||
| 31500 | 14.8 | 108.0 | 0.3 | |||||
| 40000 | 17.7 | 126.9 | 0.3 | |||||
| 50000 | 20.9 | 150.3 | 0.3 | |||||
| 63000 | 24.7 | 178.2 | 0.3 | |||||
| 75000 | 28.2 | 203.1 | 0.3 | |||||
| 90000 | 32.3 | 232.9 | 0.3 | |||||
| 100000 | 34.9 | 252.0 | 0.3 |
| S18‑6300~180000/110kV Oil‑Immersed Transformer | ||||||||
| Rated Capacity(kVA) | Voltage Combination | Vector Group | No‑Load Loss (kW) | Load Loss (kW) (75℃) | No‑Load Current (%) | Impedance (%) | ||
| High Voltage (kV) | Tapping Range | Low Voltage (kV) | ||||||
| 6300 | 110 115 121 | ±2×2.5% | 6.3 6.6 10.5 | YNd11 | 5.90 | 33 | 0.62 | 10.5 |
| 8000 | 7.10 | 40 | 0.62 | |||||
| 10000 | 8.40 | 48 | 0.58 | |||||
| 12500 | 9.90 | 56 | 0.58 | |||||
| 16000 | 12.00 | 69 | 0.54 | |||||
| 20000 | 14.10 | 84 | 0.54 | |||||
| 25000 | 13.8 15.75 18 21 | 16.60 | 99 | 0.50 | 12~14 | |||
| 31500 | 19.70 | 117 | 0.48 | |||||
| 40000 | 23.50 | 141 | 0.45 | |||||
| 50000 | 28.20 | 166 | 0.42 | |||||
| 63000 | 33.30 | 198 | 0.38 | |||||
| 75000 | 37.80 | 224 | 0.33 | |||||
| 90000 | 43.50 | 258 | 0.30 | |||||
| 120000 | 54.20 | 320 | 0.27 | |||||
| 150000 | 64.10 | 379 | 0.24 | |||||
| 180000 | 72.00 | 434 | 0.20 | |||||
| S18‑220KV 31500KVA‑240000KVA Power Transformer | |||||||||
| Rated Capacity (KVA) | Voltage Combination and Tapping Range | Vector Group | No Load Loss (KW) | Load Loss (KW) | No Load Current (%) | Capacity Allocation (%) | Impedance (%) | ||
| HV (KV) | MV (KV) | LV(KV) | |||||||
| 31500 | 220±8×1.25% 230±8×1.25% | 69 115 121 | 6.3 6.6 10.5 21 36 37 38.5 | YNyn0d11 | 28 | 145 | 0.77 | 100/100/100 100/50/100 100/100/50 | HV‑MV 12‑14 HV‑LV 22‑24 MV‑LV 7‑9 |
| 40000 | 33 | 174 | 0.73 | ||||||
| 50000 | 38 | 205 | 0.74 | ||||||
| 63000 | 45 | 244 | 0.69 | ||||||
| 90000 | 10.5 21 36 37 38.5 | 58 | 315 | 0.54 | |||||
| 120000 | 74 | 390 | 0.54 | ||||||
| 150000 | 86 | 463 | 0.48 | ||||||
| 180000 | 99 | 568 | 0.48 | ||||||
| 240000 | 120 | 704 | 0.43 | ||||||
| S22‑220KV 31500KVA‑240000KVA Power Transformer | |||||||
| Rated Capacity (KVA) | Voltage Combination and Tapping Range | Vector Group | No Load Loss (KW) | Load Loss (KW) | No Load Current (%) | Impedance (%) | |
| HV (KV) | LV (KV) | ||||||
| 31500 | 220±8×1.25% 230±8×1.25% | 6.3 6.6 10.5 21 36 37 38.5 | YNd11 | 20 | 115 | 0.48 | 12‑14 |
| 40000 | 23 | 134 | 0.5 | ||||
| 50000 | 28 | 161 | 0.45 | ||||
| 63000 | 33 | 188 | 0.45 | ||||
| 90000 | 42 | 246 | 0.38 | ||||
| 120000 | 51 | 304 | 0.38 | ||||
| 150000 | 10.5 21 36 37 38.5 | 60 | 360 | 0.35 | |||
| 180000 | 70 | 413 | 0.32 | ||||
| 120000 | 53 | 303 | 0.38 | ||||
| 150000 | 66 | 62 | 355 | 0.37 | |||
| 180000 | 73 | 406 | 0.32 | ||||
| 240000 | 69 | 91 | 504 | 0.25 | |||
Notice: There is a chance that WEIJI may make changes on above-mentioned information. Product pictures and parameters about models, data, performances and specifications on this website are for reference only.
