132/33kV 50 MVAトランスとは何ですか?

a132/33KV 50 MVAトランス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。
ProtectionBuchholz 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

132/33kV 50 MVA Power Transformer

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.