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Oil Immersed Industrial Capacitor voltage transformer VT CVT with carrier accessories Manufacturer Factory Price ISO9001. Capacitive Voltage Transformers

PRODUCT INTRODUCTION

Oil Immersed Capacitor voltage transformer with carrier accessories, also known as coupling capacitor voltage transformer, is abbreviated to CVT.

PRODUCT DETAILS

Capacitor voltage transformer with carrier accessories, also known as coupling capacitor voltage transformer, is abbreviated to CVT. The instrument transformer with carrier accessories shall be suitable for measurement control and relay protection in the outdoor AC power system of nominal voltage 161 kV, BIL750kV, 50Hz and also used for the power line carrier coupling with carrier frequency 50kHz-500 kHz PLC system.

The capacitor voltage divider is mainly composed of porcelain sleeve with flange, bottom sealing plate, capacitor core, upper sealing plate and bellows expander with PXE oil. The electromagnetic unit is mainly composed of cast aluminum case, intermediate transformer, series reactor, anti-resonance device and overvoltage protector, inner part is filled with transformer oil. All parts of the equipment are sealed up limitedly, oil leakage was effectively prevented. The product adopts small design, light weight and novel structure. The product has good insulation performance, can restrain the ferromagnetic resonance phenomenon and run stably. Other devices such as drain rings, spark gap and carrier grounding switches are provided only when the CVT is used as a coupling capacitor for line carrier.

Sihui Capacitive Voltage Transformers

一、Service Conditions

a. Outdoor

b. Ambient air temperature: -40~+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、Main technical Parameters

  1. 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

≥705

≥2248

110

≥1005

≥3906

132

≥1160

4495

150

≥1350

5270

220

≥2010

≥7812

330

≥2700

≥11253

500

≥4665

≥17050

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

Rated voltage (kV)

35

66

110

132

150

220

330

500

Highest Voltage for Equipment (r.m.s.) (kV)

40.5

72.5

123

145

170

245

363

550

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

95

160

230

275

325

460

510

740

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

95

160

230

275

325

460

510

740

Rated switching impulse withstand voltage   (peak) (kV)

950

1300

Rated lightning impulse withstand voltage   (peak) (kV)

200

325

550

650

750

1050

1175

1675

chopped   ligtning impulse voltage (peak) (kV)

230

373

635

750

865

1208

1350

1925

Partial   discharge level

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

76

112

184

220

260

368

408

592

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

49

87

126

145

170

252

363

550

Test voltage 1.2Um/√3 (kV)  PD≤5pC

28

50

87

100.5

118

174

252

381

Note: Altitude1000m, if need to design exceed 1000m, please declare in the order.

 3. Table 3

Voltage   range (kV)

35

66

110

132

150

220

330

500

Rated   capacitancepF

10000

/20000

10000

/20000

10000

/20000

5000

/10000

5000

/10000

5000

/10000

5000

/7500

2800

/5000

Rated   frequencyHz

50/60

Rated   secondary voltageV

100/√3110/√3115/√3 or 120/√3 V etc.

Rate outputVA

101525305075100 VA   or it’s multiples

Accuracy   class

0.20.51.03.0   or 0.30.61.2

3P6P   or 0.30.61.2

Cosφ=0.8

Rated   voltage facor

1.5Un30s or 1.9Un8h

System earthed

Neutral point solidly earthed system or Neutral point solidly   non-earthed system.

Standared

GB/T 20840.5IEC   61869-5 or IEEE C57.13

三、Dimensions of the Voltage Transformers   

 Voltage   range(kV)

No. of capacitor

Grading ring or not

H

mm

W1×W2

mm×mm

D

mm

35

1

×

1535~1770

470×324

22

66

1

×

1535~1770

110

1

×

1835~2070

132

1

×

2035~2270

150

1

×

2245~2470

220

2

×

3095~3425

330

2

3915~4225

500

3

5580~6405

 Notes:

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

2)If the product installation dimensions do not meet the requirements, we can provide transitional mounting bracket to meet the installation requirements.

 

The demonstration of the cvt transformer

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If you have any questions about our product, please feel free to contact us. We will answer you as soon as possible.

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