How is the EI lamination named?

The EI transformer core is formed by using laminations in the shapes of "E" and "I," which is why it is called an EI Transformer. We have two EI lamination product series：single phase and three phase. 

Regarding the naming conventions for single-phase EI laminations, they follow the format "EI-XX-?H." Here, "XX" represents the total length of the lamination, and "?H" indicates the number of holes present.

If the holes are not specified, it means that the EI lamination is without holes, which is the default configuration. For instance, "EI-42-4H" signifies a single-phase EI lamination with a total length of 42mm and 4 holes. By default, these holes are positioned at the four corners of the lamination after the E and I shapes are joined together. Please refer to the photos below for visual reference.

When it comes to three-phase EI laminations, the naming conventions follow the pattern "EI-three phase XX CORE-XX." Here, "XX" refers to the middle length and total length of the lamination, respectively.

For instance, "EI three phase 45.8 CORE-228.6" indicates a three-phase EI lamination with a middle length of 45.8mm and a total length of 228.6mm. The default total number of holes in the lamination is 6, with 4 holes positioned by default: 3 on the "E" shape and one each on the top, middle, and bottom of the "I" shape. Please refer to the photo below for visual representation. 

 Since we've figured out the rules, it wouldn't be difficult to understand the EI lamination specification the following tables:

But if there's still any question, feel free to contact us and get the answers you're looking for.

Requirements of EI silicon steel laminations vary from different customers. So if you're interested in ordering EI lamination for your manufacturing or having a sample to test out quality and market, please kindly offer us these details in order to match producing demand or make a quote more swiftly:

• Silicon steel grade
• CRGO or CRNGO
• Total order quantity (Such as: XX tons)
• Product series: Single phase or three phase
• Total amounts, diameters and position design of the punching holes
• Thickness of the sheet
• Total length of the EI lamination
• Foot length of the EI lamination
• ......

If you need any further information, feel free to contact us for more information.