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Power transformer series

SG(H)10 dry type power transformer

Simply speaking, the dry transformer is the transformer of which the iron core and winding are not immersed in the insulating oil.

It can be divided into two types by structure: (1) winding enveloped with solid insulation (2) winding not enveloped It is used for the fireproof and explosion-proof occasion. For example: general building, subway and so on.

  • Model description:

    Technical parameters:

    1. Rated capacity: 100-2500kVA;

    2. Rated voltage: primary voltage of 10kV and 6KV

    Secondary voltage 0.4kV and others:

    3. Rated frequency: 50Hz;

    4. Number of phases: 3 phases;

    5. Cooling mode: AN/AF;

    6. Temperature resistance level of the insulation materials: Level H;

    7. For technical performance data and insulation level, see Table 1 and 2.

     

    Table 1 Performance parameters of dry transformer with primary rated voltage of 6kV, 10kV

    Rated capacity (kVA)

    Voltage combination

    Connection unit symbol

    Loss

    Impedance voltage (%)

    No-load current (%)

    Primary voltage kV

    Primary voltage tapping range %

    Secondary voltage kV

    No load W

    Load W

    100

    6       
    10

    ±5

    0.4

    Dyn11

    405

    1691

    4

    1.08

    125

    ±2×2.5

    Yyn0

    477

    1995

    0.96

    160

     

     

    549

    2290

    0.9

    200

     

     

    630

    2727

    0.84

    250

     

     

    729

    2964

    0.84

    315

     

     

    891

    3734

    0.72

    400

     

     

    990

    4294

    0.72

    500

     

     

    1179

    5254

    0.72

    630

     

     

    1359

    6327

    0.6

    630

     

     

    1314

    6413

    6

    0.6

    800

     

     

    1539

    7486

    0.6

    1000

     

     

    1791

    8750

    0.6

    1250

     

     

    2115

    10431

    0.6

    1600

     

     

    2475

    12607

    0.6

    2000

     

     

    3060

    15552

    0.48

    2500

     

     

    3600

    18487

    0.48

    Table 2 Insulation level

    Rated voltage (kV)

    Rated short-term power frequency withstand voltage (kV)

    ≤1

    3

    3

    10

    6

    20

    10

    35

    15

    38

    20

    50

    35

    70

  • SGH10 series transformer is the insulation system with DuPont NOMEX paper as the main insulating medium. Best electrical performance can be maintained during whole service life of the transformer, and NOMEX paper is not easily aged and has shrinkage resistance, compression resistance and strong elastic force. Therefore, it can ensure that the coil can still maintain close structure and the capability to withstand short circuit after use of the transformer for years. It has high safety and overload capacity, free of flammability, toxic gas, supporting combustion. It is convenient for repair and maintenance, insensitive to humidity, dust and pollution, partial discharge is low, and there is no possibility in 'crack'. The coil adopts the pie type structure and vacuum impregnation process, so as to improve mechanical strength and insulation strength of the coil, and the bottom blowing structure of through-flow fan is adopted for the body, so as to improve heat emission efficiency. It is flexibly designed, and can be made of any specification required according to customer's requirements.

  • Capacity

    L × W × H (mm)

    Total weight (kg)

    100

    1000×620×1080

    430

    200

    1150×620×1145

    890

    315

    1220×620×1280

    1290

    400

    1260×620×1365

    1530

    500

    1280×620×1435

    1700

    630

    1360×700×1540

    2190

    800

    1490×700×1390

    2350

    1000

    1580×720×1480

    2840

    1250

    1670×760×1555

    3400

    1600

    1700×760×1690

    3990

    2000

    1815×890×1690

    4410

    2500

    1815×920×1820

    5150

  • 1. Oil-free, pollution-free, flame retardant and fireproof.

    2. Low loss, high efficiency and low noise.

    3. Small partial discharge capacity (generally below 10PC), high reliability. It can guarantee long-term safe operation, and the life can be up to 30 years.

    4. It can resist crack and temperature change, and has high mechanical strength and strong resistance to short circuit capability.

    5. The moisture-proof performance is good, it can be in normal operation at the humidity of 100%, and it can be put into operation without drying after stoppage.

    6. The independent transformer chamber is not required, it is not required to lift the core for maintenance, and the load bearing beam is not required, which saves floor area for civil engineering; It is oil free, will not generate toxic gas, and will not pollute the environment. The oil sump and other auxiliary buildings are not required, and the construction cost of construction cost is reduced.

    7. Installation is convenient without commissioning, and maintenance is almost not required; it is not required to replace and check oil seal, and the operation and maintenance cost is low.

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