66kv Power Main Transformer

Classification: Power Transformer
Number of Views: 50次
Date of issue: 2026-02-02 14:55:03

Product overview:Standards: Products strictly comply with major international standards including GB, IEC, GOST, EN, NF, and ANSI/IEEE. Customized designs are also available to meet specific customer requirements.
Certifications: Authorized by a full range of international certifications, including ISO, CE, IEC, SABS, COC, CSA, and UL, ensuring global recognition for quality and safety.
High Efficiency & Energy Saving: The efficiency of 66kV transformers exceeds 98%, fully complying with energy efficiency regulations in all countries worldwide.
Proven Application & Reliability: Extensive 66kV project experience accumulated in global power grid renovation, new energy integration (e.g., PV booster stations), and other fields. Products demonstrate stable operation under complex working conditions with a designed service life of over 30 years.
Environmental Protection & Sustainability: Adopting FR3 environmentally friendly insulating oil and recyclable materials to effectively reduce carbon footprint, aligning with the "Dual Carbon" policy initiative.
Delivery Capacity: Standard delivery cycle is 90 days, with the shortest expedited delivery cycle of 50 days.

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Product advantages

Product parameters

Ordering instructions

Product advantages

A 66kV transformer is a power transformer with a rated voltage of 66kV, mainly used for power grid transmission and distribution, new energy generation and grid connection, and industrial power consumption scenarios. Its design follows the international standard IEC 60076 and the Chinese national standard GB 1094, with a capacity range covering 3000kVA to 63000kVA, which can meet the power demand of different scales. This type of transformer is particularly suitable for environments with weak power grid structures and large load fluctuations, such as mines, chemical parks, offshore wind farms, and urban substations.

Product parameters

Rated voltage: 50kv-66kv-69kv

Output voltage: 6.3kV -6.9kV -10.5kV -11.5kV -15.75kV -21kV

Rated capacity: 10MVA-63MVA

Personalized customization: can be fully customized according to user requirements.

Rated capacity	Voltage Ratio	Vector Group	Cooling method	Short circuit impedance
5000	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
6300	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
8000	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
10000	35/6.3,35/10.5,33/11.5 ,33/6.9	Dy11	ONAN/ONAF	0.065
25000	66/13.8,66/11.5,66/21	Dyn11	ONAN/ONAF	0.075
31500	110/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF	0.105
40000	110/10.5,110/11.5,110/13.8,110/21	YNyn0d11	ONAN/ONAF	0.105
50000	110/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF/ODAF	0.17
63000	110/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF/ODAF	0.17

Rated voltage: 110kv-132kv

Output voltage: 6.3kV -6.9kV -10.5kV -11.5kV -15.75kV -21kV

Rated capacity: 10MVA-63MVA

Personalized customization: can be fully customized according to user requirements.

Rated capacity	Voltage Ratio	Vector Group	Cooling method	Short circuit impedance
5000	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
6300	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
8000	35/6.3,35/10.5,33/11.5 ,33/6.9	Yd11	ONAN/ONAF	0.065
10000	35/6.3,35/10.5,33/11.5 ,33/6.9	Dy11	ONAN/ONAF	0.065
25000	66/13.8,66/11.5,66/21	Dyn11	ONAN/ONAF	0.075
31500	132/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF	0.105
40000	132/10.5,110/11.5,110/13.8,110/21	YNyn0d11	ONAN/ONAF	0.105
50000	132/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF/ODAF	0.17
63000	132/10.5,110/11.5,110/13.8,110/21	YNd11	ONAN/ONAF/ODAF	0.17

Ordering instructions

- Main parameters of transformer (voltage, capacity, loss and other main parameters)
- Transformer operating environment (altitude, temperature, humidity, location, etc.)
- Other customization requirements (tap switch, color, oil pillow, etc.)
- The minimum order quantity is 1 sets
- Normal delivery period of 30 days, worldwide fast delivery