Amorphous Alloy Oil-Immersed Transformer

It saves in the no-load column. No-load loss at 630 kVA is 320 W against 570 W for the silicon-steel S13, a difference of 250 W; at 30 kVA it is 33 W against 80 W, a difference of 47 W and close to six tenths in proportion. Load loss is unchanged — both are 6200 W at 630 kVA. The annual saving is the no-load difference times the annual energised hours, independent of load factor. Send the annual energised hours and the tariff and the figure can be calculated.

At distribution points energised for long hours at a low average load factor — rural network substations, municipal lighting, scattered small loads, standby transformers on long idle duty. The gain comes only from no-load and is unaffected by how much load is carried, so the lower the load factor the larger the share amorphous removes from the total loss. On an industrial main transformer running at seventy or eighty per cent all year, load loss dominates and the payback stretches out noticeably; there the comparison worth making is against generations such as S20/S22, where both columns fall.

Amorphous ribbon is thin and brittle, so the core is wound rather than stacked and the assembly and clamping differ from a silicon-steel unit; winding construction and short-circuit design do not change with the core material, and short-circuit withstand is calculated for the rating and impedance chosen. Where a project calls for short-circuit test records or third-party test evidence, they are provided separately for the type and configuration selected.

The interfaces line up; the dimensions may not. Bushing positions and low-voltage terminals follow the standard, but the wound core has a different geometry from a stacked one, so the weight of the active part, the oil volume and the overall dimensions are a separate set of figures. Before an in-place replacement, check the wheel gauge, load-bearing capacity and clear space of the existing foundation and fence, and whether the oil pit volume is sufficient. Take the values from the actual data for the rating and core chosen rather than from a silicon-steel table of the same rating.

On lines dense in single-phase load or with very uneven load distribution. A single unit can run alone to feed single-phase load, or three units can be grouped and run as a three-phase set; the second lets capacity be set per phase instead of enlarging a whole three-phase transformer for the peak on one phase. The single-phase range covers twelve capacity steps from 5 to 160 kVA at 3.5% impedance throughout, and is likewise available with either core material.

Yes. Where it travels with the module, the prefabricated power module line takes on the enclosure, the internal arrangement and the foundation fixing, and the transformer leaves the works as equipment inside it. An oil-immersed unit inside a module needs an oil pit or oil-retention arrangement sized on the oil volume; the oil volume of an amorphous unit differs from a silicon-steel one of the same rating, so set it out from the actual data. Ventilation openings, clear cooling space and maintenance aisles are settled in one pass at the layout drawing stage.