Introduction:
Our wound cores are widely used in distribution transformers, especially for S13 type energy-saving transformers in China; we could also provide our customers with single phase wound cores like D9, D10, D11 etc., three phase wound cores; The capacity range from 10KVA to 2500KVA; Due to its particular technology craft, its performance is better than traditional stacked cores, especially for pole-mounted single phase transformers.
Manufacturing requirements:
Tolerance: See demonstrated graphic; the specified requirements should be coincide with customers drawings;
Material: we could choose Nippon steel, Baosteel, WISCO and other steel plants products to meet customers core loss requirements; in order to make sure we choose the right material, we would like our customers to provide us with detailed drawings including necessary technical parameters.
Detailed ordering instructions below:
1, All sizes in the pictures?
2, Frequency (50Hz or 60Hz)?
3, Low voltage;
4, Turns (@ low voltage)
5, Max. No-load core losses?
Dear Christine, have a question:
For system JT8054:
Take Ratio : 100/90/360
Let me explain how components A&B prepared separately:
1- we add to each component half Qty of Silica powder, I mean;
* for component A(resin). we add 180 kg silica powder to 100kg resin, in a separate container, stirred together with hand mixer and keep it.
** For component B (Hardner) we add the other half of powder (160 kg) to 90kg, stirred together and kept in another separate container.
2- CASTING MIXTURE PREPARATION:
On the day of casting (1-2 days after step (1 ), We mix the Components (A&B) preprepared as clarified above together in a mixing pot (AHG) under vacuum, pump 4.5 kw, about 1-1:5hr.
As our mixer is old and its cover not licked firmly (there is some leakage), unable to reach 10 mbar, max possible Vacum reached is 25-30 mbar.
Your comment on mixture preparation process appreciated.
Audited Supplier 
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