The 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer is a next-generation distribution transformer designed for safe and stable indoor power transmission. Manufactured by Wzonpa factory, it adopts epoxy resin insulation technology without oil, eliminating leakage risks and improving environmental performance. The 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer is engineered for continuous operation in demanding industrial and commercial environments, ensuring reliable voltage regulation and low maintenance requirements.
Oil-free epoxy resin insulation for eco-friendly and fire-safe operation
High mechanical strength and strong short-circuit resistance
Intelligent temperature monitoring with alarm and trip functions
Low partial discharge (<30pC) ensuring long-term insulation stability
Can operate at up to 125% load with forced air cooling
The 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer is built to deliver stable performance even under fluctuating grid conditions.
Compared with conventional oil-immersed models, the 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer eliminates oil contamination risks and reduces maintenance costs significantly. Its advanced cooling structure improves heat dissipation, while the vacuum casting process ensures compact design and high dielectric strength. It supports RS communication for remote monitoring, making it suitable for smart grid integration.
The 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer is widely used in:
Industrial plants and mining operations
Subways, hospitals, and data centers
Commercial complexes and high-rise buildings
Renewable energy systems such as solar and wind farms
Its flexibility allows deployment in high-humidity and polluted environments without performance degradation.
Unlike conventional suppliers, Wzonpa focuses on engineering reliability and lifecycle performance. The 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer offers lower operating losses, longer service life up to 30 years, and reduced infrastructure requirements. No oil pits, no transformer room, and minimal installation complexity make it more cost-effective than traditional alternatives.
1.Technical parameters of SC(B)10 series 35kV dry-type transformer 1.0
| RatedCapacity(kVA) | Voltage Combined | Vector group | No-load Loss(w) | loadLoss(w)120°C | No-loadcurrent(%) | Short-circuitimpedance(%) | ||
| HV(KV) | TappingRanges | LV(KV) | ||||||
| 50 | 35~38.5 | ±5%±2×2.5% | 0.4 | Dyn11Yyn0 | 450 | 1240 | 2.30 | 6.0 |
| 100 | 630 | 1830 | 2.00 | |||||
| 160 | 790 | 2450 | 1.50 | |||||
| 200 | 880 | 2900 | 1.50 | |||||
| 250 | 990 | 3320 | 1.30 | |||||
| 315 | 1170 | 3940 | 1.30 | |||||
| 400 | 1370 | 4720 | 1.10 | |||||
| 500 | 1620 | 5810 | 1.10 | |||||
| 630 | 1860 | 6720 | 1.00 | |||||
| 800 | 2160 | 7970 | 1.00 | |||||
| 1000 | 2430 | 9080 | 0.75 | |||||
| 1250 | 2830 | 11090 | 0.75 | |||||
| 1600 | 3240 | 13450 | 0.75 | |||||
| 2000 | 3820 | 15900 | 0.75 | |||||
| 2500 | 4450 | 19040 | 0.75 | |||||
2.Technical parameters of SC(B)10 series 35kV dry-type transformer 2.0
| RatedCapacity(kVA) | Voltage Combined | Vector-group | No-load Loss(w) | load Loss(w)120°℃ | No-loadcurrent(%) | Short-circuitimpedance(%) | ||
| HV(KV) | Tap ping Ranges | LV(KV) | ||||||
| 50 | 35~38.5 | ±5%±2×2.5% | 0.4 | Dyn11Yyn0 | 405 | 1240 | 2.10 | 6 |
| 100 | 570 | 1830 | 1.80 | |||||
| 160 | 710 | 2450 | 1.30 | |||||
| 200 | 790 | 2900 | 1.30 | |||||
| 250 | 890 | 3320 | 1.10 | |||||
| 315 | 1050 | 3940 | 1.10 | |||||
| 400 | 1230 | 4720 | 0.90 | |||||
| 500 | 1460 | 5810 | 0.90 | |||||
| 630 | 1670 | 6720 | 0.80 | |||||
| 800 | 1940 | 7970 | 0.80 | |||||
| 1000 | 2190 | 9080 | 0.60 | |||||
| 1250 | 2550 | 11090 | 0.60 | |||||
| 1600 | 2920 | 13450 | 0.60 | |||||
| 2000 | 3440 | 15900 | 0.60 | |||||
| 2500 | 4000 | 19040 | 0.60 | |||||
3.Technical parameters of SC(B)11 series 35kV dry-type transformer
| Rated power(kVA) | High-voltage(kV) | HV.Tap(kVA) | Low-Voltage(kV) | Vector group | No-loadCurrent(%) | Insulationclass | No-loadcurrent(%) | Short-circuitimpedance（%） |
| 800 | 3538.5 | ±5%+2×2.5% | 3.1566.31010.511 | Yyn00Dyn11Yd11 | 2250 | 8210 | 0.95 | 6.0 |
| 1000 | 2670 | 9520 | 0.95 | |||||
| 1250 | 3130 | 11270 | 0.85 | |||||
| 1600 | 3690 | 13450 | 0.85 | |||||
| 2000 | 4230 | 15900 | 0.75 | |||||
| 2500 | 4860 | 19040 | 0.75 | |||||
| 3150 | 6030 | 21400 | 0.70 | |||||
| 4000 | 7020 | 25680 | 0.70 | |||||
| 5000 | 8370 | 30480 | 0.60 | |||||
| 6300 | 9900 | 35630 | 0.60 | |||||
| 8000 | Ynd11Dyn11Yd11 | 11300 | 40170 | 0.50 | 9.0 | |||
| 10000 | 12900 | 48470 | 0.50 | |||||
| 12500 | 66.31010.511 | 15700 | 56420 | 0.40 | ||||
| 16000 | 19300 | 66380 | 0.40 | |||||
| 20000 | 22900 | 74670 | 0.30 | 10.0 | ||||
| 25000 | 27100 | 88210 | 0.30 |
What is a dry-type off-circuit tap changer transformer?
It is a transformer that uses epoxy resin insulation instead of oil and allows voltage adjustment through off-load tap switching for safe indoor power distribution.
Where can the 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer be installed?
It is suitable for indoor substations, industrial facilities, commercial buildings, and critical infrastructure requiring stable and safe power supply.
Does it require frequent maintenance?
No, the 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer is designed for low maintenance with no oil replacement or leakage inspection required.
Is it safe in fire-prone environments?
Yes, its flame-retardant and self-extinguishing epoxy structure ensures high safety in sensitive environments such as hospitals and data centers.
What is the expected service life?
With proper operation, the 35KV Indoor Dry-type Off-Circuit Tap Changer Transformer can achieve a service life of up to 30 years.
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
Tel
