1 · Drawing or parameters
Send the core drawing. No drawing? Give us transformer capacity, voltage ratio, core diameter, window height and centre distance, and we calculate it.
Machined to your drawing or core parameters. Grain-oriented silicon steel selected per project. Supplied to distribution transformer, compact substation and dry-type / oil-immersed builders.
Cores are made-to-drawing parts. The table describes how we work; final dimensions, material and inspection items follow the technical agreement both sides confirm.
| Item | Description |
|---|---|
| Core type | Step-lap wound core (open-wound), laminated core |
| Silicon steel | Grain-oriented; grade and thickness selected against your technical requirement and loss target — not fixed to a single grade |
| Supplied to | Oil-immersed distribution transformers, dry-type transformers, compact substations |
| Basis of machining | Customer drawing; or give us rated capacity, voltage ratio, core diameter, window height and centre distance and we calculate |
| Lap and stacking | Lap steps and stacking method per drawing |
| Surface treatment | Per drawing (coating, banding, etc.) |
| Inspection | Dimensions and appearance per drawing; electrical tests per the agreed technical protocol |
| Standard | Per customer technical agreement; export projects can be supplied alongside the complete unit to IEC or destination-country standards |
| Delivery form | Finished core, or machined part to drawing |
Send the core drawing. No drawing? Give us transformer capacity, voltage ratio, core diameter, window height and centre distance, and we calculate it.
We quote by core type, silicon steel grade and quantity, and confirm lap method, surface treatment and inspection items at the same time.
We make a first article before the batch so you can check dimensions and stacking quality.
Batch machined to the approved drawing, packed in wooden cases or steel frames, and can ship together with the complete units.
Cores and finished transformers are built on the same site, so core parameters, winding and assembly are checked against one technical standard — fewer drawing revisions.
Step-lap wound for low-loss distribution units, laminated for conventional and larger ratings. You pick per project instead of redesigning around one type.
We are not tied to a single silicon steel grade. The grade is chosen against your loss target and cost, and we state which grade we quoted.
On export orders the core ships with the complete transformer and its routine test documentation, so the paperwork matches.
Send your drawing or parameters — we reply with price and lead time within one business day.
Phone / WhatsApp: +86 189 6972 3308 Email: cnpengbian@126.com