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Power Transformer Procurement Parameter Checklist

Help You Confirm Key Specs for Accurate Quoting

🔌 Core Technical Parameters

❶ Transformer Type ⚙️

Dry-Type Transformer (Oil-Free)  (Indoor/commercial use, fireproof & moisture-resistant)

Oil-Immersed Transformer (with Insulating Oil)  (Outdoor/industrial use, high-capacity heat dissipation)

❷ Rated Capacity (kVA) 📏

Please provide the calculated capacity (e.g., 100kVA / 500kVA)Calculation

Reference: Capacity = Total Load Power (kW) × Coincidence Factor ÷ Power Factor

❸ Phase Configuration 🔄

Single-Phase 🏠 (Residential/small loads)

Three-Phase 🏭 (Industrial/large loads)

❹ Rated Voltages (kV) ⚡​
  • Input Voltage: ______ (e.g., 10kV / 35kV)
  • Output Voltage: ______ (e.g., 0.4kV / 10kV)
❺ Conductor Material ⛓️

Copper (Cu) 🟡 (High conductivity, ideal for critical loads)

Aluminum (Alu) 🟢 (Cost-effective, suitable for general loads)

❻ Rated Frequency (Hz) 🌍

50Hz (Asia/Europe)

60Hz (North America/Latin America)

⚡ Performance & Efficiency Parameters

❼ Load Losses (kW) 🔋

Power loss under full load
Specify requirement: ______ 

❽ No-Load Losses (kW) 🕯️

Power loss when idle (affects long-term energy costs)
Specify requirement: ______ 

❾ Vector Group 🧩

Provide design requirements or reference examples
(e.g., Dyn11 / Yyn0 – leave blank for our recommendation if unsure)

❿ Short-Circuit Impedance (%) 🔦

Choose based on load type

□ 4% (Low-voltage distribution)

□ 6% (Industrial surge protection)

□ Other: ______

🌿 Design & Environmental Parameters

⓫ Tap Changer ⚙️

□ On-Load Tap Changer ⚡ (Voltage regulation under load, industrial preference)

□ Off-Load Tap Changer ⚡ (Manual adjustment during shutdown, basic model)
Adjustment range: ±______% (e.g., ±5%)

⓬ Insulation Class 🔥
  • Dry-Type Transformers: □ Class F (155°C) □ Class H (180°C)
  • Oil-Immersed Transformers: □ Mineral Oil (Standard) □ Synthetic Ester (Eco-Friendly 🌱)
⓭ Protection Rating (Dry-Type Only) 🌧️

IP20 (Indoor dust protection)

IP54 (Outdoor dustproof & waterproof)

Other: ______

⓮ Cooling Method ❄️
  • Dry-Type: □ Natural Air Cooling (AN) 🌬️ □ Forced Air Cooling (AF) 🌀
  • Oil-Immersed: □ Oil Natural Air (ONAN) □ Oil Forced Air (ONAF) □ Water Cooling (OFWF) 💧

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

Let Our Experts Power Your Project !

Submit your project requirements today, our engineers will deliver a tailored transformer solution within 24 hours.

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