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66-110kV Oil Immersed Power Transformers from China Factory - Reliable Suppliers for Low Loss, Low Noise Solutions

General
The 110KV Transformer from Tianan Group exemplifies advanced engineering and innovative technology, designed through the synthesis of multiple state-of-the-art techniques. Our extensive experience in transformer production and design has enabled us to achieve reliability and performance standards that meet international excellence. By continually refining our processes, we have developed a series of products that reflect the unique characteristics of Tianan. These transformers feature low losses, minimal noise, reduced partial discharge, exceptional anti-short-circuit strength, high impedance, and a fully sealed construction. Additionally, we implement specialized leakage-proof measures to ensure optimal performance. The key attributes of our transformers position us as a leading supplier in China, with a manufacturing facility dedicated to quality and precision.

,

Standards: 
IEC, ANSI, IEEE, GOST, GB, and more.

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    Product Details

    Product Features

    ● Low loss
    • Electrical calculation by sophisticated computer programs, combine electrical shielding and magnetic circuit technology.
    • The core is made of cold rolled, grain orientation high magnetic silicon steel, to reduce the load loss and no-load current.
    ● Low partial discharge
    • HV lead adopts specially molded insulation parts which effectively ensure the insulation strength and reduces partial discharge.
    ● High strength
    • The tank can withstand the vacuum test and positive pressure test.
    • Omni directional location between the core and the tank to guarantee the horizontal position during transportation and operation.
    ● Low Noise
    • The step lapped joints of the core laminations reduce the additional losses arising in the corner portions, reduce the load current and electromagnetic noise.
    • Reduce of the flux density and increase the shock absorbing measures at design to reduce the noise.
    ● Maintenance-free
    • Adopts the bell type tank and the international leading technology, ensure 30 years durability, and maintenance-free operation.
    product-description1
    Transformer body assembly

    Data Sheet of Typical Products

    The energy efficiency level of 66 kV oil-immersed three-phase double-winding no-load tap-changing power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    3150 2.2 20.7 2.6 20.7 3.2 21.9 8
    4000 2.6 24.6 3.1 24.6 3.8 25.9
    5000 3.1 27.6 3.7 27.6 4.6 29.2
    6300 4.0 30.8 4.7 30.8 5.8 32.5 9
    8000 4.9 36.5 5.8 36.5 7.1 38.5
    10000 5.8 43.0 6.8 43.0 8.4 45.4
    12500 6.8 51.1 8.1 51.1 9.9 54.0
    16000 8.3 62.8 9.8 62.8 12.0 66.3
    20000 9.7 76.1 11.4 76.1 14.1 80.4
    25000 11.4 90.0 13.5 90.0 16.6 95.0
    31500 13.5 108.0 16.0 108.0 19.7 114.0
    40000 16.2 126.9 19.1 126.9 23.5 134.0
    50000 19.4 150.3 22.9 150.3 28.2 158.7
    63000 22.9 178.2 27.0 178.2 33.3 188.1
    The energy efficiency level of 66 kV oil-immersed three-phase double-winding OLTC power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    6300 4.4 30.8 5.2 30.8 6.4 32.5 9
    8000 5.3 36.5 6.2 36.5 7.7 38.5
    10000 6.2 43.0 7.3 43.0 9.0 45.4
    12500 7.4 51.1 8.7 51.1 10.7 54.0
    16000 8.9 62.8 10.5 62.8 12.9 66.3
    20000 10.6 76.1 12.5 76.1 15.4 80.4
    25000 12.5 90.0 14.8 90.0 18.2 95.0
    31500 14.8 108.0 17.5 108.0 21.5 114.0
    40000 17.7 126.9 20.9 126.9 25.8 134.0
    50000 20.9 150.3 24.7 150.3 30.4 158.7
    63000 24.7 178.2 29.2 178.2 35.9 188.1
    The energy efficiency level of 110 kV oil-immersed three-phase double-winding no-load tap-changing power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    6300 4.1 32 4.8 32 5.9 33 10.5
    8000 4.9 38 5.8 38 7.1 40
    10000 5.8 45 6.8 45 8.4 48
    12500 6.8 53 8.1 53 9.9 56
    16000 8.3 65.7 9.8 65.7 12.0 69
    20000 9.7 79 11.4 79 14.1 84
    25000 11.4 94 13.5 94 16.6 99
    31500 13.5 111 16.0 111 19.7 117
    40000 16.2 133 19.1 133 23.5 141
    50000 19.4 158 22.9 158 28.2 166
    63000 22.9 187 27.0 187 33.3 198
    75000 26.0 212 30.7 212 37.8 224 12～14
    90000 29.9 245 35.4 245 43.5 258
    120000 37.3 303 44.1 303 54.2 320
    150000 44.1 359 52.1 359 64.1 379
    180000 49.5 411 58.5 411 72.0 434
    The energy efficiency level of 110 kV oil-immersed three-phase double-winding LV-35kV no-load tap-changing power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    6300 4.4 33 5.2 33 6.4 35 10.5
    8000 5.3 40 6.2 40 7.7 42
    10000 6.2 47 7.3 47 9.0 49
    12500 7.2 56 8.5 56 10.5 59
    16000 8.6 68 10.1 68 12.5 72
    20000 10.2 85 12.0 85 14.8 89
    25000 12.1 99 14.2 99 17.5 105
    31500 14.3 120 16.8 120 20.7 126
    40000 16.9 140 20.0 140 24.6 147
    50000 20.3 174 24.0 174 29.5 183
    63000 24.0 209 28.3 209 34.9 220
    6300 4.4 33 5.2 33 6.4 35
    8000 5.3 40 6.2 40 7.7 42
    10000 6.2 47 7.3 47 9.0 49
    The energy efficiency level of 110 kV oil-immersed three-phase three-winding no-load tap-changing power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 Set up voltage Set down voltage
    6300 4.9 40 5.8 40 7.1 42 H-M:17.5~18.5
    H-L:10.5
    M-L:6.5    		 H-M:10.5
    H-L:17.5~18.5
    M-L:6.5
    8000 5.8 48 6.9 48 8.5 50
    10000 6.9 56 8.2 56 10.1 59
    12500 8.1 67 9.6 67 11.8 70
    16000 9.8 81 11.6 81 14.3 86
    20000 11.6 95 13.7 95 16.9 101
    25000 13.5 113 16.0 113 19.7 120
    31500 16.2 134 19.1 134 23.5 142 H-M:17.5~18.5
    H-L:10.5
    M-L:6.5    		 H-M:10.5
    H-L:17.5~18.5
    M-L:6.5
    40000 19.1 161 22.6 161 27.8 170
    50000 22.9 192 27.0 192 33.3 202
    63000 27.1 230 32.0 230 39.4 243
    6300 4.9 40 5.8 40 7.1 42
    The energy efficiency level of 110 kV oil-immersed three-phase double-winding OLTC power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    6300 4.4 32 5.2 32 6.4 33 10.5
    8000 5.3 38 6.2 38 7.7 40
    10000 6.2 45 7.3 45 9.0 48
    12500 7.4 53 8.7 53 10.7 56
    16000 8.9 66 10.5 66 12.9 69
    20000 10.6 79 12.5 79 15.4 84
    25000 12.5 94 14.8 94 18.2 99
    31500 14.9 111 17.6 111 21.6 117
    40000 17.8 140 21.0 140 25.8 148
    50000 21.0 175 24.8 175 30.6 184
    63000 25.0 209 29.5 209 36.3 220
    The energy efficiency level of 110 kV oil-immersed three-phase three-winding OLTC power transformer
    Rated capacity
    kVA    		 Level Ⅰ Level Ⅱ Level Ⅲ short circuit impedance
    %
    No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW    		 No-Load Loss
    kW    		 Load Loss (75℃)
    kW
    6300 5.3 40 6.2 40 7.7 42 H-M:10.5
    H-L:17.5~18.5
    M-L:6.5
    8000 6.3 48 7.5 48 9.2 50
    10000 7.5 56 8.8 56 10.9 59
    12500 8.9 67 10.5 67 12.9 70
    16000 10.6 81 12.5 81 15.4 86
    20000 12.5 95 14.8 95 18.2 101
    25000 14.9 113 17.6 113 21.6 120
    31500 17.7 134 20.9 134 25.7 142
    40000 21.2 161 25.0 161 30.8 170
    50000 25.0 192 29.6 192 36.4 202
    63000 29.8 230 35.2 230 43.3 243

    Frequently Asked Questions

    Q1: How does the transformer achieve low loss performance?

    Low loss is achieved through sophisticated computer program calculations that combine electrical shielding and magnetic circuit technology. Additionally, the core is made of cold-rolled, grain-oriented high magnetic silicon steel to reduce load loss and no-load current.

    Q2: What design features contribute to low partial discharge?

    The high voltage (HV) lead adopts specially molded insulation parts, which effectively ensure high insulation strength and minimize partial discharge during operation.

    Q3: Can these power transformers withstand high physical pressure?

    Yes, the transformer tank is designed to withstand both vacuum tests and positive pressure tests. An omni-directional location system between the core and the tank also guarantees the horizontal position is maintained during transportation and operation.

    Q4: How is the electromagnetic noise reduced in these transformers?

    Noise is minimized by using step-lapped joints in the core laminations to reduce corner losses and load current. Additionally, we reduce the flux density and incorporate shock-absorbing measures into the design to further lower electromagnetic noise.

    Q5: Are these oil-immersed transformers maintenance-free?

    Yes. By utilizing a bell-type tank and international leading manufacturing technologies, these power transformers ensure up to 30 years of durability and maintenance-free operation.

    Q6: What voltage levels do these energy efficiency tables cover?

    The provided data sheets cover typical performance and energy efficiency levels for 66 kV and 110 kV oil-immersed three-phase double-winding and three-winding power transformers, including both no-load tap-changing and OLTC models.

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