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220 kV Oil-Immersed Power Transformer.jpg
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220 KV Oil-Immersed Power Transformer

● Scientific computing tools: the transformer uses advanced electric, magnetic, thermal and mechanical computing software to calculate electro-magnetic field and magnetic flux leakage distributions, to analyze wave processes, and to select reliable insulation margin, thus to guarantee product reliability.

● Reasonable structural layout: The transformer uses multi level stepped lap helical structure to reduce the no-load losses and noise. Its core is supported by inside rods, and its winding uses cardboard tubes to enhance short circuits withstand capacity, we also uses ba file plate to direct the oil flow for reduction of winding temperature rise. Het ero ty pic radiators are applied to improve the cooling centers for reduction of oil temperature rise. All internal insulating parts and metal structural parts have round processed for reduction of partial discharge.

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    220 kV Oil-Immersed Power Transformer (2)
    01

    Main functions and characters

    ● Advanced technology: Its core is automatically cut with high precision and few burrs. It works without folding the upper yoke, with surface coated double H curing adhesive and fastened. we have vertical winding machine with digital control tension device. Its active part adopts phase-assembly technology, and the lead is wholly pre-fabricated. Automatic control of kerosene vapor-phase drying process is used.

    ● Perfect quality guarantee system: The company strictly controls the quality of products according to ISO19001 standard.

    ● Ssz1 1-240000/220 transformer has passed a complete set of the National Authoritative Type Test including sudden sc test.

    ● To meet the client's needs, we can provide products of other voltage ratios, vector Groups, and rated capacities, as listed in the table.

    product details

    220KV Double-winding power Transformers with off-circuit Tap changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV LV
    31500  

    6.3

    6.6

    10.5

    11

    		   35 135   0.70
    40000

    41

    		 157 0.70
    50000

    49

    		 189 0.65
    63000 58 220 0.65
    75000 220
    242±2x2.5%

    10.5

    11

    13.8

    		 YNd1 1 67 250 12~14 0.60
    90000 77 288 0.55
    120000 94 345 0.55
    150000   11;
    13.8;
    15.75;
    20    		   112 405   0.50
    180000 128 459 0.46
    240000 160 567 0.42
    300000 15.75;
    18;
    20    		 189 675 0.38
    360000 217 774 0.38

    220KV Double-winding power Transformers with off-circuit Tap changer with 66kv of Low voltage

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV LV
    31500 220±2x2.5% 63
    66
    69    		 YNd1 1 38 151 12~14 0.89
    40000 45 176 0.89
    50000 53 211 0.82
    63000 63 247 0.82
    90000 83 323 0.75
    120000 102 387 0.75
    150000 122 453 0.68
    180000 138 513 0.68
    240000 171 635 0.61

    220KV Double-winding power Transformers with on-load Tap-changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV LV
    31500 220±8x1.25% 66.3;  
    6.6
    10.5;   
    1 1
    35;  
    37; 
    38.5    		 YNd1 1

    38

    		 135 12~14 0.70
    40000 45 157 0.63
    50000 54 189 0.56
    63000 63 220 0.56
    900000 10.5;   
    1 1
    35;  
    37; 
    38.5    		 80 288 0.49
    120000 99 346 0.49
    150000 116 405 0.42
    180000 135 468 0.42
    120000

    63

    69

    		 102 355 0.49
    150000 120 415 0.42
    180000 140 475 0.42

    220KV Three-winding power Transformers with off-circuit Tap changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV MV LV Step-up Step-down
    31500 220
    242±2
    x
    2.5%

    63

    115

    121

    		 6.3
    6.6 
    10.5
    1 1
    35   
    37
    38.5    		 YNy nod11 40 162 H-M
    22~24
    H-L
    12~14
    M-L
    7~9    		 H-L
    22~24
    H-M
    12~14
    M-L
    7~9    		 0.70
    40000 48 189 0.63
    50000 56 225 0.56
    63000 66 261 0.56
    90000 10.5   
    1 1
    13.8  
    35
    37  
    38.5    		 86 351 0.49
    120000 106 432 0.49
    150000 1 1   
    13.8
    15.75
    35   
    37
    38.5    		 125 513 0.42
    180000 142 585 0.42
    240000 176 720 0.35
    300000 208 750 0.30

    220KV Three-winding Auto-transformers with off-circuit Tap changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV MV LV Step-up Si ep-down Step-up Step-down Step-up Step-down
    31500 220
    242±2
    x
    2.5%    		   6.6 10.5
    1 1
    35
    37
    38.5    		 YNy nod11 25 22 117 99 H-M 12~14 H-L 8~12 M-L 14~18 H-M 810 H-L 28~34 M-L 18~24 0.50
    40000 29 26 144 121 0.50
    50000 34 30 170 144 0.43
    63000 40 36 201 171 0.43
    90000 50 46 276 234 0.36
    120000 10.5
    11
    13.8 15.75 18
    35
    37
    38.5    		 62 56 340 288 0.36
    150000 70 60 405 342 0.33
    180000 80 72 464 387 0.33
    240000 95 86 595 504 0.25

    220KV Three-winding power Transformers with on-load Tap-changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Connection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV MV LV
    31500 220

    69


    115

    121

    		 6.3    
    6.6 10.5   
    1 1
    35
    37
    38.5    		 YNy nod11 44 162 H-L
    22~24
    H-M
    12~14
    M-L
    7~9    		 0.77
    40000 52 189 0.70
    50000

    60

    		 225 0.63
    63000 ±8
    x

    70

    		 261 0.63
    90000 10.5
    1 1
    35
    37
    38.5

    92

    		 351 0.56
    120000 1 .25%

    115

    		 432 0.56
    150000 135 513 0.49
    180000 159 630 0.49
    240000 193 780 0.45

    220KV Three-winding Auto-transformers with on-load Tap-changer

    Rated capacity (KV A) Voltage ratio and tap range (kv) Cnnection symbol NO-load loss (KW) Full-load loss (KW) Impedance (%) NO-load current (%)
    HV MV LV
    31500 220 115
    121    		 6.3
    6.6 
    10.5
    1 1
    35
    37
    38.5    		 YNy nod11 25 108 H-L
    28~34
    H-M
    8~10
    M-L
    18~24    		 0.56
    40000 30 132 0.56
    50000 36 157 0.49
    63000 ±8
    x    		 42 189 0.49
    90000 51 247 0.42
    120000 1 .25% 10.5
    1 1
    35
    37
    38.5    		 64 308 0.42
    150000 76 365 0.35
    180000 85 419 0.35
    240000 104 540 0.30

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