66kV Oil-immersed Station Service Transformer

Rated capacity (kVA)

Voltage combination and tap range

Bonding Group Label

Level 1 Energy Efficiency

Level 2 Energy Efficiency

Level 3 Energy Efficiency

No-load current (%)

Short circuit impedance (%)

High voltage (kV)

High voltage tap range (%)

Low voltage (kV)

No-load loss (kW)

Load loss (kW)

No-load loss (kW)

Load loss (kW)

No-load loss (kW)

Load loss (kW)

400

66 or 69

± 2 × 2.5%

0.4

Dyn11

0.51

5.7

0.58

5.7

0.64

6

0.3/0.5

8

630

0.66

6.77

0.74

6.77

0.82

7.13

0.3/0.5

800

0.77

7.98

0.86

7.98

0.96

8.4

0.3/0.5

1000

0.87

9.31

0.98

9.31

1.09

9.8

0.3/0.5

630

± 4 × 2.5%

0.66

6.77

0.74

6.77

0.82

7.13

0.3/0.5

800

0.77

7.98

0.86

7.98

0.96

8.4

0.3/0.5

1000

0.87

9.31

0.98

9.31

1.09

9.8

0.3/0.5

1250

1.02

11.4

1.15

11.4

1.28

12

0.3/0.5

1600

1.27

13.3

1.43

13.3

1.59

14

0.3/0.5

2500

1.54

18.05

1.73

18.05

1.92

19

0.3/0.5

Note: 1. According to the special technical specification of national grid procurement standard, the no-load current value above the slash in the table is the required value of rated no-load current, and the value below the slash is 1.1 times the required value of load current during overvoltage;

2. According to user requirements to manufacture a variety of special parameters and performance of the transformer.