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    • Home> Products and Services >Product Center>Power Transformer

    110kV Oil-Immersed Transformer


    110kV three-phase oil-immersed power transformer is manufactured in conformity with IEC60076 standards (applicable International Electrotechnical Commission standards) and GB1094 standards (applicable state standards of the People's Republic of China). This series of transformers features excellent impact resistance, high mechanical strength, strong short circuit resistance, low partial discharge, low noise, nice sealing performance and less maintenance. It is widely used as the main transformer in power stations, transformer substations and power transmission and transformation systems of urban and rural power grids.

    Product introduction



    Working Conditions:
    No.
    Conditions
    Units
    Parameter Values
    1
    Pollution Grade
     
    IV
    2
    Ambient Temperature
    Maximum Daily Temperature
    ℃
    40
    Minimum Daily Temperature
    -45
    Maximum Daily Temperature Difference
    K
    25
    Average Temperature of the Hottest Month
    ℃
    30
    Maximum Annual Average Temperature
    20
    3
    Humidity
    Average Daily Relative Humidity
    %
    ≤95
    Average Monthly Relative Humidity
    ≤90
    4
    Altitude
    m
    1000
    5
    Solar Radiation Intensity
    W/cm2
    0.1
    6
    Maximum Icing Thickness
    mm
    10
    7
    Maximum average wind speed: keeping in good conditions for 10min at 10m from the ground level
    m/s
    35
    8
    Earthquake Resistance
    Horizontal Ground Acceleration
    m/s2
    2
    Safety Coefficient of 3 Since Resonance Cycles
     
    ≥1.67
    9
    Installation Site
     
    Outdoor
    Note 1: Working conditions in high altitude regions (above 1000m) must be adjusted in conformity with Q/GDW 13001-2014 (High Altitude External Insulation Configuration Technical Specification).
     

    Product Parameters:
    Table 1  110kV - 6300kV.A ~ 180000kV.A, Three-Phase Duplex Windings, No-Load Voltage Regulation, Power Transformer
    Rated Capacity
    (kV.A)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage & Tapping Range (kV)
    Low Voltage (kV)
    6 300
    110±2×2.5%
    115±2×2.5%
    121±2×2.5%
    6.6
    6.6
    10.5
    YNd11
    7.40
    35.0
    0.62
    10.5
    8 000
    8.90
    42.0
    0.62
    10 000
    10.5
    50.0
    0.58
    12 500
    12.4
    59.0
    0.58
    16 000
    15.0
    73.0
    0.54
    20 000
    17.6
    88.0
    0.54
    25 000
    20.8
    104
    0.50
    31 500
    24.6
    123
    0.48
    40 000
    29.4
    148
    0.45
    50 000
    35.2
    175
    0.42
    63 000
    41.6
    208
    0.38
    75 000
    13.8
    15.75
    18
    21
    47.2
    236
    0.33
    12~14
    90 000
    54.4
    272
    0.30
    120 000
    67.8
    337
    0.27
    150 000
    80.1
    399
    0.24
    180 000
    90.0
    457
    0.20
    Note 1: -5% is the maximum current tapping position.
    Note 2: Boosting transformers are suitable for no-tap structure. Taps can also be arranged to meet operating requirements.
    Note 3: If transformers’ annual average load rate is between 42% and 46%, using loss values in this Table can obtain the highest operating efficiency. 


    Table 2 110kV - 6300kV.A ~ 63000kV.A, Three-Phase Triplex Windings, No-Load Voltage Regulation, Power Transformer
    Rated Capacity
    (kV.A)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage & Tapping Range (kV)
    Medium Voltage (kV)
    Low Voltage (kV)
    Boost
    Buck
    6 300
    110±2×2.5%
    115±2×2.5%
    121士2×2.5%
    36
    37
    38.5
    6.3
    6.6
    10.5
    11
    YNyn0d11
    8.9
    44.0
    0.66
    High-Medium
    17.5~18.5
    High-Low
    10.5
    Medium-Low
    6.5
     
    High-Medium
    10.5
    High-Low
    18~19
    Medium-Low
    6.5
     
    8 000
    10.6
    53.0
    0.62
    10 000
    12.6
    62.0
    0.59
    12 500
    14.7
    74.0
    0.56
    16 000
    17.9
    90.0
    0.53
    20 000
    21.1
    106
    0.62
    25 000
    24.6
    126
    0.48
    31 500
    29.4
    149
    0.48
    40 000
    34.8
    179
    0.44
    50 000
    41.6
    213
    0.44
    63 000
    49.2
    256
    0.40
    Note 1: Capacity assignment of high voltage winding, medium voltage winding and low voltage winding is (100/100/100)%.
    Note 2: Connection symbol can also be YNdlly10 upon demands.
    Note 3: “Medium Voltage” can use different values from this Table or arrange taps upon demands.
    Note 4: -5% is the maximum current tapping position.
    Note 5: Boosting transformers are suitable for no-tap structure. Taps can also be arranged to meet operating requirements.
    Note 6: If transformers’ annual average load rate is about 45%, using loss values in this Table can obtain the highest operating efficiency. 


    Table 3 110kV - 6 300kV.A ~ 63 000kV.A, Three-Phase Duplex Windings, On-Load Voltage Regulation, Power Transformer
    Rated Capacity
    (kV.A)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage (kV)
    Low Voltage (kV)
    6 300
    110±8×1.25%
    6.3
    6.6
    10.5
    21
    YNd11
    8.00
    35.0
    0.64
    10.5
    8 000
    9.60
    42.0
    0.64
    10 000
    11.3
    50.0
    0.59
    12 500
    13.4
    59.0
    0.59
    16 000
    16.1
    73.0
    0.55
    20 000
    19.2
    88.0
    0.55
    25 000
    22.7
    104
    0.51
    31 500
    27.0
    123
    0.51
    40 000
    32.3
    156
    0.46
    12~18
    50 000
    38.2
    194
    0.46
    63 000
    45.4
    232
    0.42
    Note 1: On-load voltage regulation transformers only have Buck structure products.
    Note 2: Transformers of other voltage combinations can be supplied upon demands.
    Note 3: -10% is the maximum current tapping position.
    Note 4: If transformers’ annual average load rate is between 45% and 50%, using loss values in this Table can obtain the highest operating efficiency. 


    Table 4 110kV - 6 300kV.A ~ 63 000kV.A, Three-Phase Triplex Windings, On-Load Voltage Regulation, Power Transformer
    Rated Capacity
    (kV.A)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage & Tapping Range (kV)
    Medium Voltage (kV)
    Low Voltage (kV)
    6 300
    110±8×1.25%
    36
    37
    38.5
    6.3
    6.6
    10.5
    21
    YNyn0d11
    9.60
    44.0
    0.76
    High-Medium
    10.5
    High-Low
    17.5~18.5
    Medium-Low
    6.5
     
    8 000
    11.5
    53.0
    0.76
    10 000
    13.6
    62.0
    0.71
    12 500
    16.1
    74.0
    0.71
    16 000
    19.3
    90.0
    0.67
    20 000
    22.8
    106
    0.67
    25 000
    27.0
    126
    0.62
    31 500
    32.1
    149
    0.62
    40 000
    38.5
    179
    0.58
    50 000
    45.5
    213
    0.58
    63 000
    54.1
    256
    0.58
    Note 1: On-load voltage regulation transformers only have Buck structure products.
    Note 2: Capacity assignment of high voltage winding, medium voltage winding and low voltage winding is (100/100/100)%.
    Note 3: Connection symbol can also be YNdlly10 upon demands.
    Note 4: -10% is the maximum current tapping position.
    Note 5: “Medium Voltage” can use different values from this Table or arrange taps upon demands.
    Note 6: If transformers’ annual average load rate is about 47%, using loss values in this Table can obtain the highest operating efficiency. 


    Table 5 110kV - 6300kV.A ~ 63000 kV.A, Three-Phase Duplex Windings, Low Voltage 35kV, No-Load Voltage Regulation, Power Transformer
    Rated Capacity
    (kV.A)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage & Tapping Range (kV)
    Low Voltage (kV)
    6 300
    110±2×2.5
    115±2×2.5
    121±2×2.5
    36
    37
    38.5
    YNd11
    8.00
    37.0
    0.67
    10.5
     
    8 000
    9.60
    44.0
    0.67
    10 000
    11.2
    52.0
    0.62
    12 500
    13.1
    62.0
    0.62
    16 000
    15.6
    76.0
    0.57
    20 000
    18.5
    94.0
    0.57
    25 000
    21.9
    110
    0.53
    31 500
    25.9
    133
    0.53
    40 000
    30.8
    155
    0.49
    50 000
    36.9
    193
    0.49
    63 000
    43.6
    232
    0.45
    Note 1: -5% is the maximum current tapping position.
    Note 2: Boosting transformers are suitable for no-tap structure. Taps can also be arranged to meet operating requirements.
    Note 3: If transformers’ annual average load rate is between 44% and 47%, using loss values in this Table can obtain the highest operating efficiency. 

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