220KV series oil immersed power transformer produced with global advanced technology and equipment, continuously updating the manufacturing experience and processing. We developed high-grade power transformer that sufficiently satisfy the operation conditions of domestic and foreign power grid.
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PRODUCT DETAILS
This 76 MVA power transformer was step down transformer 110 kV to 35 kV, the primary voltage is 110 kV, the secondary voltage is 35 kV, the transformer is equipped with on load tap changer, the tapping range is ±8*1.25% at primary side, the cooling is ONAF. The vector group of this transformer is YNd11,which neutral bushing is in primary side. Current transformer with protection for neutral bushing.The material for HV and neutral bushing is OIP. our 76 MVA power transformer was designed with advanced technology and adopts high quality material and components which result in reliable quality and long operation time.
Scope of Supply
Product: Liquid Filled Power Transformer
Rated Power: Up to 200 MVA
Primary Voltage: Up to 230 KV
The transformer can be designed according to customer’s requirements
Specification list:
80 MVA oil type power transformer specifications and data sheet
Transformer Construction of the Core:
In general, the name associated with the transformer structure depends on how the primary and secondary windings are wound on the center laminated steel core. The two most common and basic designs of transformer structure are closed core transformer and shell core transformer.
In the "closed core" type (core type) transformer, the primary and secondary windings are wound outside the core ring. In a "shell" (shell) transformer, the primary and secondary windings pass through a steel magnetic circuit (core), which forms a shell around the windings, as shown below.
Transformer Manufacturing Process - Final Assembly
Final Assembly
The final assembly begins with the removal of the core and coil assembly from the vapor phase. All internal components are re pressed under the pressure specified by the project, and now the excess water has been removed to ensure the tightness. The metal and fiber nuts are tightened or tightened as required, and the electrical clearance is verified again.
The core and coil assembly are placed in the tank, which is filled with oil to prevent exposure to air, and a cover assembly is added to connect with the sleeve. Once the enclosure is welded and leak checked, the galvanized radiator is assembled to the tank, the unit is drained, and the transformer is vacuum filled for final testing. During this period, the control box and any other customer specified monitors and components are installed and connected. All external welded components shall be installed to ensure correct installation to the tank and removed prior to the completion of the factory acceptance test of the transformer.
Finished 76 MVA 110/35 kV Transformer
The transformer was painted to gray color (RAL 7035) as customer requirements.
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220KV Power Transformer220KV series oil immersed power transformer produced with global advanced technology and equipment, continuously updating the manufacturing experience and processing. We developed high-grade power transformer that sufficiently satisfy the operation conditions of domestic and foreign power grid.
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