News | company news | Feb 27,2023

From July 18 to 21, Heyi Electric Co., Ltd. will take part in the exhibition in Sao Paulo, Brazil with booth No. B30-2, where it will exhibit its latest products.
This time, we will show the newly developed AC/DC sensor, fluxgate sensor and Hall sensor for electric vehicle charge of new energy vehicles.
KCT, HK, DP, SCT series and other open current transformer structure improved models.
For electric power bidding, we developed outdoor waterproof open type current transformer and outdoor epoxy resin current transformer.
For some customers with special requirements, Heyi Company also has CLASS:0.1, CLASS:0.2S, CLASS:0.5S and other high-precision transformers.
Protection level The protection level of the current transformer can be customized according to customer requirements. p20 5, 5 p15, 5 p10, 5 (p5, 10 p20, p15 10, 10 p10, 10 p5, etc.
ZCT series transformers for detecting leakage current, as well as generally accepted ring transformers and micro transformers.
Shunt series, models FL-2D, FL-2, FL-13, FL-19, FL-21, FL-23.
Heyi Electric specializes in the research and development, design and manufacturing of current transformers, current sensors and related accessories, which are widely used in the smart grid industry such as charging piles.
Welcome friends from all over the world to visit our booth. We sincerely hope to meet and communicate with you at the messe.

The Sao Paulo messe Show 2023
--- END ---
Feb 12, 2026
I am looking for a way to match type transformers with residual current circuit breakers. I want split type current transformers to match circuit breakers perfectly. The KCT series provides the basis, for this analysis and the application scenarios. In my work, with power distribution systems I see that residual current circuit breakers, also called… Continue reading Why split type current transformers Work with RCDs
Feb 04, 2026
Why is single‑phase window type current transformer so popular in the South American electricity market? —Technical Analysis Based on the South American Power Bureau’s Bidding and Outdoor Environment In countries, like Brazil, Chile, Peru and Colombia the power infrastructure construction has kept growing in recent years. The distribution network upgrades, the energy grid integration and the… Continue reading Why single‑phase window type current transformer Dominate South America’s Power Grid
Feb 03, 2026
Why have single phase satuation current transformers (CTs) become an essential core component of switchgear in Southeast Asia? — Detailed technical analysis using the ICT series encapsulated transformer as an example. We examine the ICT series encapsulated transformer. In Asian countries such, as Malaysia, Indonesia, Thailand and Vietnam the low-voltage switchgear appears a lot in… Continue reading Why Single-Phase Saturation Isolation Current Transformers Are Essential in Switchgear