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    Oil Immersed Industrial Station Service Voltage Transformer SSVT Manufacturer Factory ISO9001 Station Service Voltage Transformers

    PRODUCT INTRODUCTION

    Oil Immersed Station Service Voltage Transformer shall be suitable for measurement control and relay protection in the outdoor AC power system of nominal voltage 40.5~252kV, and frequency of 50 or 60Hz.

    PRODUCT DETAILS

    The SSVT (Station service voltage transformer) shall be suitable for measurement control and relay protection in outdoor AC power system of nominal voltage 40.5~252kV, and frequency of 50 or 60Hz. SSVT- type voltage transformers are oil immersed electromagnetic station service voltage transformer. The core was used cold-rolled silicon steel strip to folded single-column and three pairs of the same potential with the ground. High voltage coil main insulation chose sheet paper, small oil clearance and large structures. It was wounded as pagoda-shaped segments. High-voltage leads were insulated by a condenser bushing. We select corrugated metal expander as oil temperature variation compensator and can inspect the oil level through window. Fuel tank and the lower tank welded together, and all the other seals are made of sealed limit, effectively preventing the leakage of oil.

    Outline dimensions drawing and structure shown in Figure 1.

    Sihui Station Service Voltage Transformers

    一、Service Conditions

    a. Ambient air temperature: maximum +40℃, minimum -45℃, average value of the ambient air temperature does not exceed 30℃ measured during a period of 24h.

    b. Altitude: The altitude does not exceed 1000m (this is the routine requirement, if there is any different requirement, we can provide the products with 2000m, 3000m, 4000m or 5000m altitude according to the clients’ requriments).

    c. The average value of the relative humidity does not exceed 95% at 25℃ measured during a period of one month.

    d. The maximum wind speed does not exceed 34m/s.

    e. Eerthquake intensity does not exceed 8 degree.

    f. There have to be no gas that may seriously affect the insulation and conductive ability of electric equipments, steam, ash, salt, chemical deposit, pollution and corrosive or explosive material.

    二、Main Technical Parameters

    1. Rated frequency: 50Hz or 60Hz
    2. Rated primary voltage: 35/√3,66/√3,110/√3,132/√3,150/√3,220/√3 kV
    3. Rated secondary voltage:  100/√3,110/√3,120/√3,200/√3,400/√3 V
    4. Rated output: 10,25,50,75,100,125 kVA
    5. Accuracy class for core: 0.2, 0.5, 3P
    6. Ambient air temperature: -45 ℃/+40 ℃
    7. Altitude: 1000m, if need to design exceed 1000m, please declare in the order.

    Note: System earthing conditions: Non-effectively earthed neutral system and effectively earthed neutral system.

    三、Arcing distance and creepage distance of outer insulation please see table 1.

    Rated voltage

    (kV)

    Arcing distance

    (mm)

    Creepage Distance (mm)

    Pollution Level Ⅱ (W1)

    Pollution Level Ⅲ (W2)

    Pollution Level (W3)

    35

    ≥410

    ≥810

    ≥1013

    ≥1256

    66

    ≥720

    ≥1450

    ≥1813

    ≥2248

    110

    ≥1010

    ≥2520

    ≥3150

    ≥3906

    132

    ≥1160

    2900

    3625

    4495

    150

    ≥1350

    3400

    4250

    5270

    220

    ≥2010

    ≥5040

    ≥6300

    ≥7812

    四、Insulation requirements for the primaries please see table 2.

    Rated voltage (kV)

    35

    66

    110

    132

    150

    220

    power-frequency withstand voltage (r.m.s)   (kV)

    95

    160

    230

    275

    325

    460

    The wet   test for the current transformer of power-frequency withstand (r.m.s) (kV)

    95

    160

    230

    275

    325

    460

    Rated   switching impulse withstand voltage (peak) (kV)

    Rated   lightning impulse withstand voltage (peak) (kV)

    200

    325

    550

    650

    750

    1050

    chopped   ligtning impulse voltage (peak) (kV)

    230

    373

    635

    750

    865

    1208

    Partial discharge level

    prestressing performed voltage (r.m.s) (kV)

    76

    112

    184

    220

    260

    368

    Test   voltage 1.2Um or Um (kV) PD≤10pC

    49

    87

    126

    145

    170

    252

    Test   voltage 1.2Um/√3 (kV) PD≤5pC

    28

    50

    87

    100.5

    118

    174

     

    五、Mechanical requirements for the primary terminals please see table 3.

    Rated voltage (kV)

    35

    66

    110

    132

    150

    220

    Mechanical requirements (horizontal of two   directions and vertical) (N)

    Load

    500

    1000

    1000

    1000

    1250

    Applied   to the primary terminals with duration (s)

    60

    60

    60

    60

    60

    六、Dimensions Of The Station Service Voltage Transformer

    1. The outline and installation dimensions please see drawing 1.The demonstration of the ssvt
    2. The dimensions of the primary termanils please see table 4.    

    Rated   Voltage (kV)

    Rated output (kVA)

    A (mm)

    B (mm)

    C (mm)

    D (mm)

    E (mm)

    35

    25

    1490

    700

    730

    600

    20

    50

    1650

    725

    860

    630

    20

    75

    1680

    755

    890

    660

    20

    100

    1680

    810

    890

    700

    20

    125

    1700

    840

    910

    740

    20

    66

    25

    1890

    730

    800

    650

    20

    50

    2020

    760

    930

    680

    20

    75

    2050

    790

    960

    710

    20

    100

    2070

    840

    980

    760

    20

    125

    2110

    850

    1020

    850

    20

    110

    25

    2260

    790

    900

    710

    20

    50

    2360

    810

    980

    730

    20

    75

    2390

    840

    1010

    770

    20

    100

    2410

    890

    1030

    810

    20

    125

    2460

    900

    1070

    900

    20

    132

    25

    2430

    820

    930

    740

    20

    50

    2540

    840

    1010

    770

    20

    75

    2570

    870

    1040

    800

    20

    100

    2590

    920

    1070

    840

    20

    125

    2640

    930

    1100

    930

    20

    150

    25

    2670

    850

    980

    760

    24

    50

    2780

    870

    1060

    790

    24

    75

    2810

    900

    1090

    820

    24

    100

    2830

    950

    1120

    860

    24

    125

    2880

    960

    1150

    950

    24

    220

    25

    3610

    940

    1100

    880

    24

    50

    3720

    960

    1180

    910

    24

    75

    3780

    990

    1210

    940

    24

    100

    3980

    1340

    1480

    1000

    24

    125

    4050

    1050

    1270

    1070

    24

    Note: 

    There may be any change of the dimensions for the station service voltage transformer because of renewing, the clients must basis on the updated drawings.

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