10kv 500kva Step Down Oil Immersed Transformer

WenZhou XiFa Electrical Power Equipment Co., Ltd is a professional factory to produce 10kv 500kva step down oil immersed transformer with customized service to fit working environment for overseas clients. For example, Wenzhou XiFa Electrical Power Equipment Co., Ltd would rise up the requirement of temperature rise from 65 K to 45 K on winding average for the client in the Middle East and Central Asia. And each 10kv 500kva step down oil immersed transformer would adopt high grade insulation oil in producing process to have standard operation under -50 °C to 60 °C.

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Product Description

Installation Requirements of Oil immersed Transformers:

1. 10kv 500kva step down oil immersed transformers shall be properly secured and supported to prevent any vibration or movement that may occur during transportation and installation.

2. The 10kv 500kva step down oil immersed transformer shall be installed vertically on a solid foundation and carefully leveled to ensure stable operation.

3. The supporting structures of 10kv 500kva step down oil immersed transformers shall be installed in a vertical and horizontal alignment and properly insulated from the ground. The installation height shall not exceed 2.5 m horizontally and 4 m vertically. All components and connections of 10kv 500kva step down oil immersed transformers shall be firmly and reliably fastened.

4. Bushings and leads of 10kv 500kva step down oil immersed transformers should be arranged as close as possible. Where conditions permit, leads may be connected to the 10kv 500kva step down oil immersed transformer body through insulating sleeves or designated lead holes.

5. All supporting frames of a 10kv 500kva step down oil immersed transformer must be strong and reliable. All connecting parts and fasteners shall be capable of withstanding load tests under rated operating conditions.

6. The cooling system and all accessories of the 10kv 500kva step down oil immersed transformer shall be complete, intact, and properly installed.

7. The installation site of the 10kv 500kva step down oil immersed transformer shall be clean and dry, free from any flammable, explosive, or corrosive substances. Smoking and open flames are strictly prohibited in the vicinity.

8. After installation, proper sealing measures shall be carried out to prevent the ingress of oil leakage, air, or moisture into the tank, which may otherwise lead to operational faults or accidents.

10kv 500kva Step Down Oil Immersed Transformer

Technical Specification:

Product Name		10kv 500kva step down oil immersed transformer
Voltage Ratio		10/0.4 kV
Vector Group		Dyn11 or Yyn0
Cooling System		ONAN
Tap Changer	Type	De-energized Tap Changer or On-Load Tap Changer
	Range	2.5% per level, Five steps for total
Impedance		4.5%±10%
Temperature Rise		Oil Top: ≤55 K; Winding Average: ≤65 K
Ambient Temperature		-25°C to +40°C
Altitude		≤ 1000 m (derating required for high altitude operation)
Relative Humidity		≤ 95%

Safety Measures of Oil immersed Transformer

Since 10kv 500kva step down oil immersed transformers use oil as the insulating medium, appropriate safety precautions must be strictly observed during all electrical operations. In order to reduce the risk of insulation failure and ensure safe operation, the following measures shall be implemented:

1. Regular inspection of the 500kva ONAN transformer shall be strengthened. Any potential safety hazards shall be identified and eliminated in a timely manner.

2. Short circuit faults during operation shall be strictly prevented, as the resulting short circuit current may cause severe internal pressure which could lead to tank rupture or fire hazards.

3. To reduce the risk of explosion caused by internal faults, the tank of 10kv 500kva step down oil immersed transformers shall be equipped with appropriate pressure relief devices to release excessive internal pressure when necessary.

4. Each 10kv 500kva step down oil immersed transformer from Wenzhou XiFa electrical could be load at 120% within 2 hours. However, long term overloading operation of the 10kv 500kva step down oil immersed transformer shall be avoided, as it may result in excessive temperature rise, accelerated insulation aging, and reduced service life.