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

    Three-Dimensional Roll-Core Dry-Type Transformer


    Three-dimensional roll-core dry-type transformer is a new type of ideal power distribution equipment with new magnetic structure, high efficiency, low loss, energy conversation, safety and environment protection. It is applicable for high-rise buildings, residential communities, government institutions, airports, subways, petroleum fields, chemical engineering, metallurgical fields, ships, harbors, mines and occasions demanding fire and explosion protection.

    Product introduction



    Working Conditions:
    No.
    Conditions
    Units
    Project Requirement
    1
    Rated Voltage
    kV
    10
    2
    Highest Operating Voltage
    kV
    12
    3
    System Neutral Point Earthing Mode
     
    Unearthed
    4
    Rated Frequency
    Hz
    50
    5
    Pollution Grade
     
    d(Ⅲ)
    6
    System Short Circuit Current Level (High Voltage Side)
    kA
    20
    7
    Ambient Temperature
    Maximum Daily Temperature
    ℃
    40
    Minimum Daily Temperature
    -25
    Maximum Daily Temperature Difference
    K
    25
    Average Temperature of the Hottest Month
    ℃
    30
    Maximum Annual Average Temperature
    20
    8
    Humidity
    Average Daily Relative Humidity
    %
    ≤95
    Average Monthly Relative Humidity
    ≤90
    9
    Altitude
    m
    ≤1000
    10
    Solar Radiation Intensity
    W/cm2
    0.1
    11
    Maximum Icing Thickness
    mm
    20
    12
    Maximum average wind speed: keeping in good conditions for 10min at 10m from the ground level
    m/s
    35
    13
    Earthquake Resistance
    Horizontal Ground Acceleration
    m/s2
    2
    Safety Coefficient of 3 Since Resonance Cycles
     
    ≥1.67
    14
    Installation Site
     
    Indoor
    Note 1: Values about temperatures in the table must be adjusted accordingly if the lowest ambient temperature is above -25℃.
    Note 2: Pollution grade diagram must be provided if the pollution grade is grade IV. 


    Product Parameters:
    Table 1  6kV&10kV - 30kV.A ~ 500kV.A, No-Load Voltage Regulation, Distribution Transformer
    Rated Capacity (kVA)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss under Different Insulation System Temperatures (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage (kV)
    High Voltage Tapping Range (%)
    Low Voltage (kV)
    130℃(B)
    (100℃)
    155℃(F)
    (120℃)
    180℃(H)
    (145℃)
    30
    6
    6.3
    6.6
    10
    10.5
    11
    ±2.5
    ±5
    0.4
    Dyn11
    Yyn0
    0.190
    0.670
    0.710
    0.760
    2.0
    4.0
    50
    0.270
    0.940
    1.00
    1.07
    2.0
    80
    0.370
    1.29
    1.38
    1.48
    1.5
    100
    0.400
    1.48
    1.57
    1.69
    1.5
    125
    0.470
    1.74
    1.85
    1.98
    1.3
    160
    0.540
    2.00
    2.13
    2.28
    1.3
    200
    ±2×2.5
    ±5
    0.620
    2.37
    2.53
    2.71
    1.1
    250
    0.720
    2.59
    2.76
    2.96
    1.1
    315
    0.880
    3.27
    3.47
    3.73
    1.0
    400
    0.980
    3.75
    3.99
    4.28
    1.0
    500
    1.16
    4.59
    4.88
    5.23
    1.0
    630
    1.34
    5.53
    5.88
    5.29
    0.85
    630
    1.50
    6.61
    5.96
    6.40
    0.85
    6.0
    800
    1.52
    6.55
    6.96
    7.46
    0.85
    1 000
    1.77
    7.65
    8.13
    8.76
    0.85
    1 250
    2.09
    9.10
    9.69
    10.3
    0.85
    1 600
    2.45
    11.0
    11.7
    12.5
    0.85
    2 000
    3.05
    13.6
    14.4
    15.5
    0.70
    2 500
    3.60
    16.1
    17.1
    18.4
    0.70
    1 600
    2.45
    12.2
    12.9
    13.9
    0.70
    8.0
    2 000
    3.05
    15.0
    15.9
    17.1
    0.70
    2 500
    3.60
    17.7
    18.8
    20.2
    0.70
    Note: Values of on-load loss in this Table is determined by different insulation system temperatures in brackets (please refer to GB1094.11) . Values of on-load loss under other insulation system temperatures (not specified in this Table) must be converted accordingly based on the value of “155℃(F)”.


    Table 2  6kV&10kV - 630kV.A ~ 6300kV.A, No-Load Voltage Regulation, Power Transformer
    Rated Capacity (kVA)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss under Different Insulation System Temperatures (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage (kV)
    High Voltage Tapping Range (%)
    Low Voltage (kV)
    130℃(B)
    (100℃)
    155℃(F)
    (120℃)
    180℃(H)
    (145℃)
    630
    6
    6.3
    6.6
    10
    10.5
    11
    ±2×2.5
    ±5
    3
    3.15
    6
    6.3
    Dyn11
    Yd11
    Yyn0
    1.44
    6.00
    6.36
    6.80
    1.0
    6.0
    800
    1.62
    7.17
    7.60
    8.13
    1.0
    1 000
    1.94
    8.28
    8.78
    9.39
    0.85
    1 250
    2.34
    9.86
    10.4
    11.1
    0.85
    1 600
    2.79
    12.0
    12.7
    136.6
    0.85
    2 000
    3.60
    14.3
    15.2
    16.2
    0.70
    2 500
    4.23
    16.8
    17.8
    19.1
    0.70
    3 150
    5.04
    19.7
    20.9
    22.3
    0.60
    7.0
    4 000
    10
    10.5
    11
    6.07
    23.7
    26.1
    26.0
    0.60
    5 000
    7.20
    28.0
    29.7
    31.8
    0.50
    6 300
    8.50
    33.3
    35.2
    37.8
    0.50
    Note: Values of on-load loss in this Table is determined by different insulation system temperatures in brackets (please refer to GB1094.11) . Values of on-load loss under other insulation system temperatures (not specified in this Table) must be converted accordingly based on the value of “155℃(F)”.


    Table 3  6kV&10kV - 315kV.A ~ 2500kV.A, On-Load Voltage Regulation, Distribution Transformer
    Rated Capacity (kVA)
    Voltage Combination & Tapping Range
    Connection Symbol
    No-Load Loss (kW)
    On-Load Loss under Different Insulation System Temperatures (kW)
    No-Load Current (%)
    Short-Circuit Impedance (%)
    High Voltage (kV)
    High Voltage Tapping Range (%)
    Low Voltage (kV)
    130℃(B)
    (100℃)
    155℃(F)
    (120℃)
    180℃(H)
    (145℃)
    315
    6
    6.3
    6.6
    10
    10.5
    11
    ±4×2.5
    0.4
    Dyn11
    Yyn0
    0.990
    3.40
    3.61
    3.86
    1.1
    4.0
    400
    1.12
    4.02
    4.27
    4.57
    1.1
    500
    1.28
    4.92
    5.22
    5.58
    1.1
    630
    1.49
    5.82
    6.17
    6.60
    1.0
    630
    1.44
    6.00
    6.36
    6.80
    1.0
    6.0
    800
    1.71
    7.07
    7.50
    8.02
    1.0
    1 000
    1.98
    8.28
    8.78
    9.39
    0.85
    1 250
    2.34
    9.86
    10.4
    11.1
    0.85
    1 600
    2.72
    11.7
    12.4
    13.3
    0.85
    2 000
    3.42
    14.3
    15.2
    16.2
    0.70
    2 500
    3.96
    17.1
    18.1
    19.4
    0.70
    Note: Values of on-load loss in this Table is determined by different insulation system temperatures in brackets (please refer to GB1094.11) . Values of on-load loss under other insulation system temperatures (not specified in this Table) must be converted accordingly based on the value of “155℃(F)”.

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