1

Max. rated through current (A)

400

600

1000

1300

400

600

1000

1200

1500

1600

2400

3000

2

Rated frequency (Hz)

50 or 60

3

Connection

3-phase Y-connection

for neutral point only

Single-phase for any selectable

winding connection

4

Max. rated step voltage (V)

4000

5

Rated step capacity

1500

1600

3000

3300

1500

1600

3000

3000

4000

4400

5600

6000

6

Short-circuit

current test (kA)

Thermal (3s)

6

8

12

15

6

8

12

24

24

24

24

30

Dynamic (peak)

15

20

30

37.5

15

20

30

60

60

60

60

75

7

Max. operating positions

35 without change-over selector; 107 with change-over selector

8

Insulation to ground

The highest voltage

for equipment (kV)

72.5

126

170

252

Rated separate source AC withstand voltage (kV/50Hz,1min)

140

230

350

460

Rated lightning impulse

withstand voltage (kV,1.2/50μs

350

550

750

1050

9

Tap selector

Categorized into B, C, D & DE four sizes

10

Mechanical life

Not less than 1,500,000 operations

11

Electrical life

Not less than 600,000 operations

12

Oil compartment

of diverter switch

Service pressure

0.03 MPa

Leakage test

No leakage under 0.08 MPa for 24 hours

Over pressure

protection

Rupture disc bursts at 300 ± 20% KPa

Protective relay

Set oil flow speed at 1.0m/s ± 10%

13

Motor drive unit

SHM-D or CMA7