200 MVA Power Transformer

Primary Voltage Ratings: 220kV
Secondary Voltage Ratings: 18kV
H.V. TAP RANGE: 220*±2 x 2.5%
CONNECTION TYPE: YNd11
TYPE: Three phase oil filled
BIL: 750/125kV
Standards: EN60076
Power Rating: 200MVA
Cooling Method: OFAF

The 200 MVA three-phase oil-filled transformer, designed for outdoor use, meets DSTU and DSTU EN 60076-1 standards, ensuring a 30-year service life. It features HV of 220 kV, LV of 18 kV, and a solidly grounded neutral. The OFAF cooling system and NLTC tap changer enhance operational efficiency. With a robust design for fire safety and noise levels not exceeding 85 dB, it includes galvanized control cabinets and various temperature devices. Dimensions are 10500 mm x 5500 mm x 8700 mm, with a transport weight of 185.5 t.

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The 200 MVA three-phase oil-filled transformer is designed for outdoor installations, delivering high reliability and efficiency for demanding power applications. Built in compliance with DSTU and DSTU EN 60076-1 standards, this transformer is engineered for a service life of no less than 30 years before the first overhaul.

Technical Specifications

Power Rating: 200 MVA
High Voltage (HV): 220 kV nominal; 242 kV rated; 252 kV highest operating voltage
Low Voltage (LV): 18 kV nominal; 29 kV rated; 19.8 kV highest operating voltage
Neutral Voltage: 110 kV
Cooling System: OFAF (Oil Forced Air Forced)
Tap Changer: On-Load Tap Changer (NLTC), Manual Drive, Range: ±2 x 2.5%
Short-Circuit Voltage: 11%
No-Load Current: ≤ 0.22%
No-Load Losses and Short Circuit Losses: Meet Ecodesign Level 2 requirements
Resistance to Short-Circuit Currents: In compliance with DSTU EN 60076-5
Lightning Impulse Withstand (Full Wave):
- HV: 750 kV
- LV: 125 kV
- 110 kV Neutral: 400 kV
Lightning Impulse Withstand (Chopped Wave):
- HV: 835 kV
- LV: 150 kV
Power-Frequency Withstand Voltage (Short-Duration, 1 min.):
- HV: 325 kV (ph-ground), 395 kV (ph-ph)
- LV: 50 kV (ph-ground)
- 110 kV Neutral HV: 200 kV

Physical Characteristics

Dimensions (L x W x H): 10500 mm x 5500 mm x 8700 mm
Weight:
- Transport Weight: 185.5 t
- Full Weight: 160 t
- Oil Weight: 32.5 t
Painting Color: Light Grey
Movement on Site: Possible via rails and ribbed rollers

Safety and Compliance

Fire Safety: Conforms to GOST 12.2.007.0-75, GOST 12.2.007.2-75, GOST 12.1.004-91
Noise Level: Maximum of 85 dB at 2 meters distance
Accessories:
- Pressure Devices
- Oil Temperature Device
- Winding Temperature Device
Control Cabinets:
- Galvanized to prevent rust and corrosion
- Automatic control cabinet with temperature-based fan control
- Equipped with lighting, a ~220 V socket, heating with thermostat
- Constructed from stainless steel or galvanized materials

This 200 MVA transformer is built to provide exceptional performance and durability, meeting rigorous standards for both operational efficiency and safety. It is ideally suited for applications requiring robust and reliable power transmission and distribution solutions.