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    Oil Immersed Filled Industrial Current Transformer CT Manufacturer factory price ISO9001 Current Transformers

    PRODUCT INTRODUCTION

    This current transformer is an oil-paper insulated type with a metallic expansion bellow, Connection between components uses argon-arc welding, fill in high pressure nitrogen to detect leakage after assembly is complete.

    PRODUCT DETAILS

    Current transformer LVB product range is based on top core design. It is an oil-paper insulated type with a metallic expansion bellow, Connection between components uses argon-arc welding, fill in high pressure nitrogen to detect leakage after assembly is complete, so oil penetration and oil leakage caused by oil-immersed products are resolved at root. Use an aluminum alloy cast case, all components including the base, connection box, stainless steel expander, and nameplate etc do not rust forever. It is outdoor, single phase, and oil-immersed to-head type, which is used for metering and relay protection of 220kv, 50 or 60Hz system. It is a reliable product with minimum maintenance and suitable for wide range of environmental conditions.

    This product is light and handy with a small volume and light weight and meets the requirement of horizontal transportation.

    Sihui Oil Type Transformer

    一、Service Conditions

    a. Outdoor

    b. Ambient air temperature: 45 ~ +40℃(average value of the ambient air temperature does    not exceed 30 measured during a period of 24h).

    c. Altitude 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’ requirements).

    d. Application: 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

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

    f. Max. wind speed ≤34m/s

    g. Earthquake intensity ≤ 7 degree.

    二、Technical Parameters

    1. Rated frequency: 50 or 60Hz
    2. Rated primary current: 50 ~ 4000A
    3. Rated secondary current: 1 or 5A
    4. Rated output: 10~60VA
    5. Instrument security factor: 5 or 10
    6. Accuracy limited factor:10, 15, 20, 30, 40, 50 or 60
    7. Accuracy class for metering cores: 0.2, 0.2S, 0.5, 0.5S, 1 or 0.3, 0.6, 1.2
    8. Accuracy class for protective cores: 5P, 10P, PR, PX, TPS, TPX, TPY, TPZ or C10, C20, C50, C100, C200, C400, C800
    9. Rated short-time thermal current: ≤63kA/3s
    10. Rated dynamic: ≤160kA
    11. Creepage distance: 31mm/kV

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

    Rated   voltage(kV)

    Arcing   distance(mm)

    Creepage Distance (mm)

    35

    ≥410

    ≥1256

    66

    ≥720

    ≥2248

    110

    ≥1010

    ≥3906

    132

    ≥1160

    4495

    150

    ≥1350

    5270

    220

    ≥2010

    ≥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

    power-frequency withstand voltage at the SF6   gas pressure 0MPa (kV)

    30

    54

    95

    109

    128

    190

    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

    1250

    2000

    2000

    2000

    2500

    Load

    2500

    3000

    3000

    3000

    4000

    Applied to the primary terminals with duration (s)

    60

    60

    60

    60

    60

    六、Dimensions and the outline drawing of the Current Transformers.

    1. outline drwaing of CT

    The demonstration of the oil immersed current transformer

       2. Dimensions of CT

    Rated Voltage

    A (mm)

    B (mm)

    C (mm)

    D (mm)

    E (mm)

    35

    785

    1463

    475

    790

    20

    66

    785

    1712

    475

    790

    20

    110

    785

    2212

    475

    790

    20

    132

    878

    2375

    450

    790

    20

    150

    878

    2675

    450

    790

    20

    220

    881

    3652

    600

    760

    24

    Note: There may be any change of the dimensions for the current transformers because of renewing, the clients must basis on the updated drawings.

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