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    • 110kV level three-phase on-load tap-changing power transformer
    • 110kV level three-phase on-load tap-changing power transformer
    • 110kV level three-phase on-load tap-changing power transformer
    • 110kV level three-phase on-load tap-changing power transformer
    • 110kV level three-phase on-load tap-changing power transformer

    110kV level three-phase on-load tap-changing power transformer

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    110kV LEVEL THREE-PHASE ON-LOAD TAP-CHANGING

    ELECTRIC POWER TRANSFORMER

    Summary

    We have adopted series of important reforms on the 110kV level three-phase oil-immersed on-load tap-changing transformer referring material,
    process and structure. The transformer has the features of small size, light weight, high efficiency, low loss, low noise, reliable operation etc,
    which can reduce a large amount of power network loss and operation expenses with significant economic beneffts. It is suitable for power plant substation,
    heavy section plant ore enterprises etc.

    图片1

    Main 110kV level three-phase on-load tap-changing power transformer technical parameters
    Rated
    Capacity
    (kVA)    		 Voltage Combination Vector Gourp No-load Loss Load Loss No Load
    Current    		 Short Circuit
    Impedance
    %
    HV
    (kV)    		 LV
    k(V)    		 kW kW %
    6300   6.3
    6.6
    10.5
    11    		 YNd11 7.40 35.0 0.62 10.5
    8000   8.90 42.0 0.62
    10000   10.50 50.0 0.58
    12500   12.40 59.0 0.58
    16000   15.00 73.0 0.54
    20000   17.60 88.0 0.54
    25000 110±2*2.5% 20.80 104 0.50
    31500 115±2*2.5% 24.60 123 0.48
    40000 121±2*2.5% 29.40 148 0.45
    50000   35.20 175 0.42
    63000   41.60 208 0.38
    75000   13.8
    15.75
    18
    21    		 47.20 236 0.33 12-14
    90000   54.40 272 0.30
    120000   67.80 337 0.27
    150000   80.10 399 0.24
    180000   90.00 457 0.20

    Note 1:-5% tapping position is maximum current tapping.
    Note 2: For boost transformer, it is advisable to adopt non-tapping structure. If there is any requirement for operation, sub-connectors can be set up.
    Note 3: When the average annual load rate of transformer is between 42% and 46%, the maximum operating efficiency can be obtained by using the loss value in the table.

    6300kVA-63000kVA three-phase three -winding NLTC power transformer
    Rated
    Capacity
    (kVA)    		 Voltage Combination Vector Group No-load loss
    kW    		 Load loss
    kW    		 No load current
    %    		  
    High Voltage
    kV    		 Med-ium Voltage
    (kV)    		 Low Voltage
    (kV)    		 Step down
    6300         8.9 44.00 0.66  
    8000         10.6 53.00 0.62  
    10000         12.6 62.00 0.59  
    12500   33 6.3   14.7 74.00 0.56 H-M
    16000 110±2*2.5% 35 6.6 YNyn0d11 17.9 90.00 0.53 10.5
    20000 115±2*2.5% 37 10.5   21.1 106 0.53 H-L
    25000 121±2*2.5% 38.5 11   24.6 126 0.48 18-19
    31500         29.4 149 0.48 M-L
    40000         34.8 179 0.44 6.5
    50000         41.6 213 0.44  
    63000         49.2 256 0.40  

    Note l: High, medium and low voltage winding capacity allocation is (100/100/100)% high, medium and low.
    Note 2: The connection group label can be YNd11y10 as required.
    Note 3: According to the user's requirement, medium voltage can be selected as different from the voltage value in the meter or with taps.
    Note 4:-5% tapping position is maximum current tapping.
    Note 5: For boost transformer, it is advisable to adopt non-tapping structure. If the operation requires, tapping can be set up.
    Note 6: When the average annual load rate of transformer is about 45%, the maximum operating efficiency can be obtained by using the loss value in the table.

    Rated
    Capacity
    (kVA)    		 Voltage Combination Vector Gourp No-load Loss Load Loss No Load
    Current    		 Short Circuit
    Impedance
    %
    HV
    (kV)    		 LV
    k(V)    		 kW kW %
    6300       8.00 35.0 0.64 10.5
    8000       9.60 42.0 0.64
    10000   6.3
    6.6
    10.5
    11    		   11.30 50.0 0.59
    12500   6.6   13.40 59.0 0.59
    16000   10.5   16.10 73.0 0.55
    20000 110±8*1.25% 11 YNd11 19.20 88.0 0.55
    25000   21   22.70 104 0.51
    31500       27.00 123 0.51
    40000       32.30 156 0.46 12-18
    50000       38.20 194 0.46
    63000       45.40 232 0.42

    Note 1: On-load tap-changer, temporarily providing step-down structure products.
    Note 2: According to user's requirements, other voltage combination products can be provided.
    Note 3:-10% tapping position is maximum current tapping.
    Note 4: When the average annual load rate of transformer is between 45% and 50%, the maximum operating efficiency can be obtained by using the loss value in the table.

    6300-63000kVA three phase two winding OLTC power transformer
    Rated
    Capacity
    (kVA)    		 Voltage Combination Vector Gourp No-load Loss Load Loss No Load
    Current    		 Short Circuit
    Impedance
    %
    HV
    (kV)    		 LV
    k(V)    		 kW kW %
    6300         9.6 44.00  
    8000         11.5 53.00  
    10000     6.3   13.6 62.00  
    12500   33 6.6   16.1 74.00 H-M
    16000   36 10.5   19.3 90.00 10.5
    20000 110±8*1.25% 37 11 YNyn0d11 22.8 106 H-L
    25000   38.5 21   27.0 126 18-19
    31500         32.1 149 M-L
    40000         38.5 179 6.5
    50000         45.5 213  
    63000         54.1 256  

    Note 1: On-load tap-changer, temporarily providing step-down structure products.
    Note 2: High, medium and low voltage winding capacity allocation is (100/100/100)% high, medium and low.
    Note 3: The connection group label can be YNd11y10 as required.
    Note 4:-10% tapping position is maximum current tapping.
    Note 5: According to user's requirement, medium voltage can be selected as diferent from the voltage value in the meter or with Note 5: When the average annual load rate of transformer is about 47%,the maximum operating efficiency can be obtained by using the loss value in the table.

    Rated
    Capacity
    (kVA)    		 Voltage Combination Vector Gourp No-load Loss Load Loss No Load
    Current    		 Short Circuit
    Impedance
    %
    HV
    (kV)    		 LV
    k(V)    		 kW kW %
    6300       8.00 35.0 0.64 10.5
    8000       9.60 42.0 0.64
    10000       11.30 50.0 0.59
    12500   6.3
    6.6
    10.5
    11    		   13.40 59.0 0.59
    16000   6.6   16.10 73.0 0.55
    20000 110±8*1.25% 10.5 YNd11 19.20 88.0 0.55
    25000   11   22.70 104 0.51
    31500   21   27.00 123 0.51
    40000       32.30 156 0.46 12-18
    50000       38.20 194 0.46
    63000       45.40 232 0.42

    图片3

     

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