Oil-immersed power transformers · SBH15-M
SBH15-M Sealed Amorphous-Alloy Power Transformer
The SBH15-M is a fully oil-filled sealed power transformer that works like any sealed unit, except that its core is made of amorphous alloy. It is built to JB/T 10318-2002, the technical-parameter standard for oil-immersed amorphous-alloy-core distribution transformers.
Product overview
Fully oil-filled sealed amorphous-alloy power transformer: no-load loss 70% below the GB/T 6451 group I values and load loss 15% below standard.
- Model
- SBH15-M
- Product family
- Oil-immersed power transformers
Product overview
The fully oil-filled sealed construction keeps the insulating oil completely isolated from the surrounding air, so no oil top-up and no breather maintenance are needed. The core is wound from amorphous alloy strip and combined with optimised windings and clamping structure, so the reliability of a sealed transformer is kept while no-load loss falls sharply.
The amorphous alloy material
- Its base elements are iron, nickel, cobalt, silicon, boron and carbon; it is an isotropic soft magnetic material with low magnetising power.
- It has no structural defects to impede domain-wall motion; the strip is only 0.027 mm thick, so the stacking factor is correspondingly low at 0.75–0.8.
- Resistivity is very high — 3–6 times that of silicon steel sheet — and hardness is 5 times that of silicon steel laminations.
- Amorphous alloy is particularly sensitive to mechanical stress, which the core structure and assembly process are designed to protect against.
Loss levels and standards
Across the SBH15-M-30~1600/6~10 range, load loss is 15% below the GB/T 6451 values and no-load loss 70% below the GB/T 6451 group I values. The applicable standard is JB/T 10318-2002, Technical parameters for oil-immersed amorphous-alloy-core distribution transformers.
Key features
- Fully oil-filled sealed tank; the oil never contacts air
- Amorphous alloy wound core: no-load loss 70% below group I values
- Load loss 15% below the GB/T 6451 values
- Amorphous strip 0.027 mm thick, stacking factor 0.75–0.8
- Resistivity 3–6 times and hardness 5 times that of silicon steel
- Dyn11, LV 0.4 kV, ratings from 30 to 2500 kVA
- Built to JB/T 10318-2002, maintenance-free in service
Key facts
- Rated capacity
- 30–2500 kVA
- Voltage class
- 10 kV / 0.4 kV
- Structure & cooling
- Oil-filled sealed tank · ONAN
- Standard
- GB/T 6451 · JB/T 10318
Technical parameters
| Rated capacity (kVA) | No-load current (%) | No-load loss (W) | Load loss at 75 °C (W) | Impedance (%) |
|---|---|---|---|---|
| 30 | 1.7 | 33 | 600 | 4.0 |
| 50 | 1.3 | 43 | 870 | 4.0 |
| 63 | 1.2 | 50 | 1040 | 4.0 |
| 80 | 1.1 | 60 | 1250 | 4.0 |
| 100 | 1.0 | 75 | 1500 | 4.0 |
| 125 | 0.9 | 85 | 1800 | 4.0 |
| 160 | 0.7 | 100 | 2200 | 4.0 |
| 200 | 0.7 | 120 | 2600 | 4.0 |
| 250 | 0.7 | 140 | 3050 | 4.0 |
| 315 | 0.5 | 170 | 3650 | 4.0 |
| 400 | 0.5 | 200 | 4300 | 4.0 |
| 500 | 0.5 | 240 | 5150 | 4.0 |
| 630 | 0.3 | 320 | 6200 | 4.5 |
| 800 | 0.3 | 380 | 7500 | 4.5 |
| 1000 | 0.3 | 450 | 10300 | 4.5 |
| 1250 | 0.2 | 530 | 12000 | 4.5 |
| 1600 | 0.2 | 630 | 14500 | 4.5 |
| 2000 | 0.2 | 750 | 17400 | 5.0 |
| 2500 | 0.2 | 900 | 20200 | 5.0 |
Note: For the SBH15-M-30~1600/6~10 range, load loss is 15% below the GB/T 6451 values and no-load loss 70% below the GB/T 6451 group I values.
Typical installations
- Urban and rural distribution feeders
- Distribution for industrial and mining plants
- Distribution rooms in commercial and residential buildings
- Sites with long light-load operation where no-load loss dominates
- Box-type substations built with LV switchgear
Related products
Other products in this family
S11 / S13 / S14 / S20 / S22
Rated capacity:
30–2500 kVA
Voltage class:
10 kV / 0.4 kV
S11–S22 Three-Dimensional Wound-Core Oil-Immersed Transformer
Distribution transformer with a three-phase triangular wound core: no joints, no air gaps and no-load losses 25–35% below stacked-core designs.
SBH25
Rated capacity:
30–2500 kVA
Voltage class:
10 kV / 0.4 kV
SBH25 Amorphous-Alloy Oil-Immersed Transformer
Amorphous alloy wound core in a fully sealed corrugated tank; no-load loss is about one third to one quarter of a comparable S13 silicon-steel unit.
SBH15
Rated capacity:
30–2500 kVA
Voltage class:
10 kV / 0.4 kV
SBH15 Amorphous-Alloy Oil-Immersed Transformer
Core wound from amorphous alloy strip, with no-load loss about 70% below an S9 transformer, a copper-foil LV winding and Dyn11 vector group.
SBH21
Rated capacity:
30–2500 kVA
Voltage class:
10 kV / 0.4 kV
SBH21 Amorphous-Alloy Oil-Immersed Transformer
Grade 2 efficiency amorphous-alloy oil-immersed transformer to GB 20052-2020: no-load loss as low as the SBH15, load loss around 15% lower.
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