High quality 3 phase step down transformer with KEMA/CESI approved

Model

Rated capacity (KVA)

Connection symbol

Voltage combination (KV)

No-load loss (W)

Load loss (W)

No-load current (%)

Short circuit impedance (%)

High-
voltage

Tapping range

Low-
voltage

S11-M-30

30

Yyn0

or

Dyn11

100

600

2.3

4.0

S11-M-50

50

130

870

2.0

4.0

S11-M-63

63

150

1040

1.9

4.0

S11-M-80

80

180

1250

1.9

4.0

S11-M-100

100

200

1500

1.8

4.0

S11-M-125

125

240

1800

1.7

4.0

S11-M-160

160

280

2200

1.6

4.0

S11-M-200

200

340

2600

1.5

4.0

S11-M-250

250

6

400

3050

1.4

4.0

S11-M-315

315

6.3

±5%

480

3650

1.4

4.0

S11-M-400

400

10

or

0.4

570

4300

1.3

4.0

S11-M-500

500

10.5

±2×2.5%

680

5100

1.2

4.0

S11-M-630

630

11

810

6200

1.1

4.5

S11-M-800

800

980

7500

1.0

4.5

S11-M-1000

1000

1150

10300

1.0

4.5

S11-M-1250

1250

1360

12800

0.9

4.5

S11-M-1600

1600

1640

14500

0.8

4.5

S11-M-2000

2000

2280

17820

0.6

5.0

S11-M-2500

2500

2700

20700

0.6

5.0

1. The transformer core is stacked by imported high-quality cold-rolled silicon steel sheet, which reduces no-load loss and no-load current greatly, and makes the core bound to ensure compactness of the core and reduce noise.

2. High-low voltage winding is wound with oxygen-free cooper, low-voltage winding of 500kVA and below adopts double layer cylinder structure, that of 630kVA and above adopts double helix and four helix structure, and high-voltage winding adopts multilayer cylinder structure.

3. Transformer winding connection adopts Dyn11 to reduce influences of harmonic wave on the power grid and improve power supply quality.

4. The transformer is of full-sealed structure to prolong the shelf life and avoid suspended core use and maintenance.

5. The measured noise level is below the standard.

No suspended-core inspection is needed for this series of transformer after normal transportation and relevant unloading parts can be installed immediately, test for acceptance items shall be performed and it can be put into operation after passing the test.