II. 50 Mva Power Transformer Type
For HENGFENGYOU ELECTRIC, a 40mva transformer can be a power transformer. The type of transformers have the same principle, but their structures are different, and different types of transformers have different applications. HENGFENGYOU ELECTRIC provides you with the most ideal solution.
50mva power transformer (rated voltage 66kV-232kV)
III. The core advantages of a 50 Mva Power transformer
1. Standards: GB, IEC, GOST, EN, NF, ANSI/IEEE (customizable according to customer standards)
2. Certification: ISO、CE、IEC、SABS、COC、CSA、UL
3. Efficiency: The efficiency of a 50mva transformer is greater than 99%, which can meet the European 2015/2014/548/EC ecodesign Tier 2 energy efficiency regulations.
4. Maintenance free: IP65 protection level, dustproof and moisture-proof, maintenance free, designed for a lifespan of over 25 years.
5. Environmental protection and sustainable development: FR3 vegetable oil can be selected.
6. Overload capacity: Copper coil 50mva transformer allows short-term overload to 150% of rated capacity for no more than 2 hours, but requires monitoring of oil temperature (≤ 95 ℃).
IV. Price of 50 Mva Power Transformer
V. 50 Mva Power Transformer Case
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VI. Frequently Asked Questions (FAQ) for 50mva Power Transformers
Q1: What is a 50mva power transformer?
A 50mva-110kv power transformer is a high-voltage electrical device used to step up or step down voltage in power transmission and distribution systems, typically connecting substations between 110kV (primary side) and lower voltages (e.g., 10kV, 35kV).
Q2: What are the common types of 50mva power transformers?
- By Cooling Method: Oil-immersed (ONAN/ONAF/OFAF), dry-type (rare for 110kV).
- By Function: Step-down (110kV→lower voltage), step-up (e.g., generator output to grid).
- By Phase: Three-phase or single-phase (usually grouped for three-phase systems).
Q3: What are key parameters of a 50mva power transformer?
- Voltage ratio: 110kV/(10.5kV, 35kV, etc.).
- Impedance voltage: ~10.5% (varies by design).
- Cooling class: ONAN (oil-natural air-natural), ONAF (forced air).
- Vector group: YNd11, YNy0, etc.
Q4: What standards apply to 50mva power transformers?
- IEC 60076 (international)
- IEEE C57.12.00 (US)
- GB/T 6451 (China)
Q5: What are the key steps for transformer installation?
Site preparation: Foundation, oil containment, fire safety.
Transport & positioning: Use specialized tools to avoid shocks.
Oil processing: Filtration and degassing (for oil-filled units).
Tests: Insulation resistance, turns ratio, DGA (dissolved gas analysis).
Q6: How is a 50mva power transformer commissioned?
- Pre-energization checks (oil level, grounding, protections).
- No-load test: Measure excitation current and losses.
- Load test: Verify temperature rise and performance.
Q7: How to monitor 50mva power transformer health?
DGA: Detect faults via gas analysis (e.g., methane, hydrogen).
Temperature: Oil/winding temperature alarms (e.g., 95°C alarm).
Partial discharge (PD) tests: Detect insulation defects.
Q8: What is routine maintenance for 50mva power transformers?
- Annual oil testing (dielectric strength, moisture).
- Bushing and cooling system inspection.
- Tightness check for gaskets and connections.
Q9: What are common transformer faults?
Insulation failure: Due to aging or moisture.
Overheating: Caused by overloading or cooling system failure.
Bushing leaks: Oil leakage or cracks.
