Core Positioning
This product series represents a high-precision voltage-regulating distribution transformer designed for industrial, commercial, and critical load scenarios within 10kV and lower voltage distribution networks that have stringent requirements for power supply voltage quality. It integrates online on-load tap-changing (OLTC) functionality to dynamically maintain stable output voltage, making it an ideal choice for ensuring power supply quality in high-end manufacturing, data centers, commercial hubs, and urban core areas.
Technical Specifications
|
Rated capacity |
Rated voltage and tapping range |
Vector group |
No Load Current |
|
No load Losses |
On load Losses |
||
|
HV |
Tapping range |
LV |
||||||
|
200 |
10 |
±4×2.5 |
0.4 |
Dyn11 Yyn0 |
0.8 |
4 |
0.31 |
2.9 |
|
250 |
0.72 |
0.35 |
3.42 |
|||||
|
315 |
0.72 |
0.43 |
4.1 |
|||||
|
400 |
0.64 |
0.51 |
4.95 |
|||||
|
500 |
0.64 |
0.61 |
5.89 |
|||||
|
630 |
0.48 |
4.5 |
0.77 |
7.26 |
||||
|
800 |
0.48 |
0.9 |
8.89 |
|||||
|
1000 |
0.48 |
1.09 |
10.4 |
|||||
|
1250 |
0.4 |
1.25 |
12.3 |
|||||
|
1600 |
0.4 |
1.54 |
14.7 |
|||||
|
2000 |
0.32 |
5 |
1.82 |
18.6 |
||||
|
2500 |
0.32 |
2.14 |
21.6 |
|||||
Core Advantages and Features
1. Real-time Dynamic Voltage Precision Control:
- Integrated On-Load Tap-Changer (OLTC) provides a wide-range, multi-step fine-tuning capability of up to ±4×2.5%. It enables automatic or manual voltage adjustment during load operation without interruption or arcing, effectively countering the effects of grid voltage fluctuations and load changes to ensure the low-voltage side output consistently remains within an optimal range.
2. Comprehensive Voltage Compatibility and High Adaptability:
- The high-voltage side is fully compatible with various common domestic and international distribution system voltage standards, including 6kV, 6.3kV, 10kV, and 10.5kV.
- The low-voltage side provides a standard output of 0.4kV, directly supplying the end-use low-voltage distribution system.
- Offers a choice between two standard vector groups, Dyn11 and Yyn0, allowing users to flexibly select based on system grounding methods, harmonic characteristics, and protection requirements.
3. Optimized Electrical Performance and High Efficiency:
- Short-circuit impedance is tiered (4%, 4.5%, 5%), effectively limiting low-voltage side short-circuit currents and enhancing system safety.
- While providing dynamic, precise voltage regulation, the design employs advanced low-loss technology. The no-load current is as low as 0.32%, with both no-load and load losses well-controlled, balancing excellent power quality with operational economy.
4. Wide Capacity Coverage and High Reliability:
- The capacity range spans from 200 kVA to 2500 kVA, meeting the capacity demands of various scenarios, from medium-sized commercial buildings to large industrial workshops.
- The oil-immersed insulation and cooling system is mature and reliable. The on-load tap-changer mechanism is robust and durable, suitable for critical locations requiring 24/7 continuous and stable power supply.
Typical Applications
10kV dedicated substations for voltage-sensitive industries such as high-end precision manufacturing, semiconductors, and biopharmaceuticals.
10kV distribution systems for large data centers, financial institutions, and cloud computing centers.
Distribution rooms in important commercial complexes such as urban core business districts, premium office buildings, and five-star hotels.
Hub substations or power quality management nodes in distribution network areas with significant voltage fluctuations.
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