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Split Current Transformer Core

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Split Current Transformer Core

Split Current Transformer Core

Split Current Transformer Core

Trade Mark
Customized Dimensions
Delivery time
Samples: 5~7 days; Batches: 7~30 days accordingly.
Payment term
TT or L/C


CRGO silicon steel with characteristics of low iron-loss and high permeability in thickness of 0.23mm, 0.27mm.


Cores are wound by our independently-developed winding machine and are high vacuum heat treated. Asymmetric cutting is acceptable. They come in shapes of UI, UU, and toroidal with precise dimensions.


Mainly used in the current transformers for electricity acquisition and detection. Square and round hole shapes are available.


High accuracy

Adopting the appropriate current transformer structure and the compensation-control method, the split current transformer can achieve very high accuracy and provide protection for accurate measurement.

Wide measurement range

The split current transformer core has a gap which broadens the unsaturated region of the magnetization. Therefore, the maximum current measured by the split current transformer is much larger than that measured by the current transformer with a closed structure. For example, the split current transformer core has a wider measuring range.


Because of the open-close structure, the high precision split current transformer can be clamped directly on the measured conductor, and then the non-invasive measurement can be carried out without cutting off the circuit.

Strong anti-saturation ability

The split current transformer core has a gap which strengthens the saturation magnetic flux density of the core. Besides, the influence of residual magnetism on the split current transformer is lower than that on the closed structure current transformer. These make the split current transformer a strong anti-saturation capability.


Peter Jacobson

We are looking for an open U-shaped core (for example, the U part of a UI core)for building an electromagnet, with the parallel sides approximately 30 mm long and the single side approximately 60 mm long, and a cross-section of 10 x 10 mm approximately, for a field in the core of 1.5 T maximum. Operating frequency is 1 kHz max. We would like to find a standard product with these approximate dimensions. Thank you.
2016-05-15 22:02:42

Curt Linstra

Can I get the dimensions of your UI Split current transformer core. I need to know the height, outer width, inner opening width. The ones on your website at I’m interested in the square and rectangle ones that are displayed on the web page. How much would it cost to get a few samples? Thank you, Curt Linstra
2015-12-29 06:36:37


Dear Curt, thanks for your email. By now there is no standard sizes for tape wound UI cores, but we could manufacture such cores according to customer designs. I will contact you by email soon for more information. Thanks!
2017-05-02 15:27:17

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