Current Transformer Cores

Wound cores are the most essential electromagnetic components of many types of instruments such as instrument voltage and current transformers, inductors, choke filters and so on. These types of cores are manufactured in toroidal, C and E shapes and rarely rectangular depending on customer demand. 

Beyond these types, gap-core and uni-cores are also within the production scope of the wound core production line in ENPAY. 

The electromagnetic steels used in the production of wound cores are:

• CRGO-cold rolled grain oriented electrical steel (SiFE)- ENSI^® 
• IEC 60404-1 Class E1 Nickel Content 70% to 85% ENNI^®
• IEC 60404-1 Class E2 Nickel Content 54% to 68% ENNI^®
• Nanocrystalline - ENNANO^®

Toroidal Cores

Toroidal cores are mainly used in instrument current transformers; however, they are also available to be installed inside inductors and filters.

ENPAY manufactures toroidal cores with materials which are specified under the subject of “Wound Cores”.

If otherwise is not specified, IEC 60635 is referred for specifications.

Besides, oval, rectangular or any other shapes which are classified within toroidal cores are available in the production range of ENPAY. 

Toroidal Cut Cores

As well as toroidal cores without cutting, ENPAY can manufacture Toroidal Cut Cores according to customers’ specifications. Toroidal cut cores can be used in the production of chokes, instrument current transformers and special design transformers.

Cut cores are manufactured with a certain air gap which is adjusted with the interposed spacers or can be shipped without adjustment if demanded by the customer to adjust in-house.

C-Cores ve E-Cores

C-Cores and E-Cores are made of numerous grades and thicknesses of Grain Oriented Electrical Steel, Nickel-iron & Nanocrystalline and are used for Voltage Transformers as well as Current Limiting Reactors used for HVDC Applications. Utilizing its long years of experience and know-how in cutting technology, ENPAY holds a leading position in this product portfolio.

Besides having flexible production, our engineering team cooperates with our customers to develop the most optimum core type for the required application area according to IEC 60329 standards.

Distributed Gap Cores and Unicores

Distributed Gap Core has a similar shape to the C-Core but has only one gap on one limb. Unlike C-Cores, each layer of strips has only one cut, thus the core obtains extremely low core losses.