1

Max. rated through-current (A)

400

600

800

2

Rated frequency (Hz)

50 or 60

3

Connection

3-phases Y connection for neutral point only

Single-phase for any selectable winding connection

4

Max. rated step voltage (V)

4000

5

Rated step capacity (kVA)

1200

1500

1600

6

Short-circuit

current test (kA)

Thermal (3s)

6

8

9.6

Dynamic (Peak)

15

20

24

7

Max. Operating Positions

27

8

Insulation

to ground

(kV)

Highest voltage for

equipment Um

72.5

126

Rated separate source AC

withstand voltage (kV/50Hz,1min)

140

230

Rated lightning impulse

withstand voltage (kV,1.2/50μs)

350

550

9

Tap selector

4 grades of B, C, D and DE according to insulation level

10

Mechanical life

Not less than 1,500,000 operations

11

Contact life

Not less than 300,000 operations

12

Oil compartm-ent of diverter switch

Service pressure

0.03Mpa

Leakage test

No leakage under 0.08Mpa for 24 hours

Over pressure protection

Bursting cap busts at 300 ± 20%kPa

Protection relay

Oil flow speed set at 1.0m/s ±10%

13

Motor drive unit

SHM-D or CMA7

14

Oil filter plant

ZXJY-1 / ZXJY-2 / ZXJY-3 according to requirement (Necessary when max. rated through current is 1000A and above or OLTC used for industrial applications)