SF6 Voltage Transformer

SF6 Voltage Transformer SF6 Voltage Transformer is outdoor, single phaseThe product adopts case-type structure. The equipment body is placed inside the case. Its central part adopts silicone rubber composite insulator or high strength porcelain insulator. Top is equipped with primary Terminals...

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 SF6 Voltage Transformer

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SF6 Voltage Transformer is outdoor, single phaseThe product adopts case-type structure. The equipment body is placed inside the case. Its central part adopts silicone rubber composite insulator or high strength porcelain insulator. Top is equipped with primary Terminals

◆It has a pressure-relief device with pressure blasting (release pressure) of 0.8MPa at side panel, free oil, no risk of explosion and free maintenance.

◆The layer insulation consists of high strength composite insulation  of diamond polyester film and gas SF6, no aging and has a function of insulation restoring.

◆Density meter is mounted on the base which can show the transformer internal gas pressure (display value automatically converted to internal gas pressure at 20 ℃) and density, when transformer internal  pressure drops down to alarm level, gas should be replenished.

◆Optimized designs for external insulation make inner and external electric field distribute evenly without discharge. Two type insulators are offered for user.

1. Composite insulator

2. High strength porcelain insulator

◆Sealing ring adopts special material for SF6 gas which is applicable  to a area with large temperature difference and harsh environment , annual leakage rate is less than 0.5%.

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Rated primary voltage, kV

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Highest voltage for equipment, kV

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frequency, Hz

50;60

Rated power frequency withstand voltage, kV

95

140/160

230

275

325

460

Rated lightning impulse voltage, kV

200

325/350

550

650

750

1050

Flashover distance, mm

385

780

1050

1300

1300

2000

Cree. distance, mm

W1:810

W2:1020

W3:1260

W1:1450

W2:1820

W3:2250

W1:2520

W2:3150

W3:3910

W1:2900

W2:3630

W3:4500

W1:3400

W2:4250

W3:5270

W1:5040

W2:6300

W3:7820

Mechanical load, N

1250

1250

1250

1250

1250

1250

Rated secondary voltage, kV

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Secondary terminal marks

1a-1n

2a-2n

da-dn

 Accuracy class

0.2

0.5

3P

Rated output, VA

50

50

100

75

75

150

100

100

300

 Thermal limiting output, VA

1000;2000

Rated voltage factor

1.2/continuous;1.9/8h (66kV)

1.2/continuous;1.5/30s(110~220kV)

tgδ,10kV下

Dielectric dissipation factor tgδ, under 10kV

tgδ≤0.005

SF6(20℃)  Rated gas pressure, MPa

0.5

SF6(20℃)   Gas-supply pressure, MPa

0.45

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