63kv 66kv 69kv High Voltage Power Transformer Manufacturer

 

 

In 2019, we delivered three 66kV Class Three Phase Two Winding OLTC Power Transformers to our Chinese customers. These transformers were used in secondary substations with a rated power of 200,000 kVA, a primary voltage of 66kV, and a secondary voltage of 11kV. These low-loss transformers are a new generation of products independently developed by our company, EverNew, based on advanced domestic and international technologies. They feature low partial discharge, low losses, high reliability, and strong resistance to sudden short-circuit protection. Through this project, we not only met our customers’ demands for efficient and stable power transmission but also demonstrated EverNew’s technical innovation and advanced manufacturing capabilities in transformer products. This solidified our leading position in the Chinese transformer market.

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63kv 66kv 69kv High Voltage Power Transformer  Position in power system

In the power system, 66kV power transformers are typically located in secondary substations, also known as intermediate or secondary substations. These transformers receive high-voltage power from primary substations (or main substations) and convert it to lower voltage suitable for the distribution network, ensuring efficient and reliable power delivery to end users.

For more information about 63kv 66kv 69kv PowerTransformer repower system, please contact us

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63kv 66kv 69kv High Voltage Power Transformer Protection Device

1. The pressure relief valve mainly releases pressure when the internal pressure of the transformer is too high to prevent the transformer from exploding.

Principle: The pressure relief valve is a safety valve. When the internal pressure of the transformer exceeds the set value, the valve automatically opens to release excessive pressure and discharge gas or oil vapor, thereby preventing the pressure from continuing to rise and ensuring the safety of the transformer and the surrounding environment.

Use: Generally installed on the top or side of the transformer tank, regular inspection and maintenance are required to ensure its sensitivity and reliability.

2. The gas relay monitors the gas in the transformer oil and detects faults.

Principle: The gas relay is installed on the pipeline between the transformer tank and the cooling device, and contains a float and electrical contacts. When a fault occurs inside the transformer (such as a short circuit or overload), gas is generated, and the gas gathers on the top of the tank, pushing the float down, triggering the electrical contacts, sending an alarm signal or cutting off the power supply to prevent the fault from expanding.

Application: Applicable to oil-immersed transformers, which require regular inspection and maintenance to ensure their accuracy and reliability.

3. The temperature monitor monitors the transformer temperature in real time to prevent overheating.

Principle: The temperature monitor usually consists of a temperature sensor and a display, which is installed on the transformer winding and the surface of the oil tank. The sensor measures the actual temperature of the transformer and transmits the data to the display or control system. When the temperature exceeds the preset safety threshold, the system sends an alarm signal or automatically takes cooling measures, such as starting a cooling fan or oil pump, to prevent the transformer from overheating and damage.

Application: Widely used in various types of transformers, regularly calibrated and maintained to ensure its accuracy and response speed.

Technical Characteristics of 63kv 66kv 69kv High Voltage Power Transformer

Voltage Level of 63kv 66kv 69kv High Voltage Power Transformer