目次
132/33kV 50 MVAトランスとは何ですか?
a132/33KV 50 MVAトランスは高電圧パワートランス132kV(伝送)から33kV(分布レベル)に電圧を下げるために使用されます。50 MVAの容量(Megavolt-Amperes)、この変圧器は理想的です地域変電所、産業工場そして再生可能統合ハブ。
技術仕様テーブル
パラメータ | 仕様 |
---|---|
定格電力 | 50 MVA |
一次電圧(HV) | 132 kv |
二次電圧(LV) | 33 kv |
ベクターグループ | dyn11 / ynd1 / ynd11(設計による) |
頻度 | 50 Hz / 60 Hz |
フェーズ | 3相 |
冷却タイプ | onan / onaf(オイルナチュラル /強制) |
タップチェンジャー | OLTC(±10%、±16ステップ)またはNLTCオプション |
インピーダンス | 通常、10.5% - 12% |
絶縁耐力 | HV:275kV / LV:70kVインパルス |
ブッシングタイプ | 磁器または複合 |
絶縁クラス | クラスA /F。 |
Protection | Buchholz Relay、PRV、OTI、WTI、DGPT2 |
Applications of 132/33kV 50 MVA Transformer
- Grid Substations
- Large Industrial Plants
- Wind & Solar Farms
- Urban Transmission Hubs
- Oil & Gas Installations
- Interconnection with Power Utilities
Cooling Methods Explained
- ONAN– Oil Natural Air Natural (standard for up to 50 MVA)
- ONAF– Oil Natural Air Forced for improved performance under peak loads
Construction & Design
- Core: Cold-rolled grain-oriented silicon steel
- Winding: Copper (high-conductivity), layered or disc winding
- Tank: Hermetically sealed or conservator type
- Cooling Radiators: Detachable for modular maintenance
- Accessories: Oil level gauge, breather, pressure relief device, temperature indicators, etc.
Standard Compliance
- IEC 60076
- ANSI/IEEE C57
- IS 2026 (India)
- GB/T 6451 (China)
- BS EN Standards (UK)
Why Choose a 50 MVA Transformer at 132/33kV?
- Balances high capacity with manageable size
- Ideal for step-down to regional grids
- Ensures high-efficiency transmission with minimal losses
- Compatible with smart grid SCADA integration

Frequently Asked Questions (FAQs)
Q1: Can this transformer support dual voltage outputs?
Yes. With dual secondary windings or tap changer settings, the transformer can support flexible output.
Q2: Is OLTC mandatory?
For systems requiring voltage regulation, OLTC is preferred. However, for fixed-load conditions, NLTC can be used.
Q3: How long does a 132/33kV transformer last?
With proper maintenance, the expected service life is 25–35 years or more.