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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 -40℃, 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: -40 ℃~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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