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PRODUCT CLASSIFICATION

Flexible Rogowski coil
Flexible Rogowski coil
Split Core Current transformer
Split Core Current transformer
Three phase current transformer
Three phase current transformer
Current Transformer
Current Transformer
High Voltage Current Transformer
High Voltage Current Transformer
Mini Current Transformer
Mini Current Transformer
Current Sensor
Current Sensor
Shunt
Shunt

ABOUT YUEQING HEYI

Yueqing Heyi Electric Co., Ltd. was established in 2012. It is a young and flexible manufacturer of current transformers and current sensors.

OEM and ODM suppliers

HEYI is a manufacturer of current transformers. After years of efforts, become SIEMENS, SCHNEIDER, FUJI Electric, SoftBank, LG, SAMSUNG and other companies OEM and ODM suppliers. Benefit from strong R & D design team and production team.

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Corporate advantage

Superior research and development strength, leading split core current transformer and custom transformer technology. We will update and iterate the latest products every year according to market demand, and the whole industry will follow.

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PRODUCT CERTIFICATE

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KEY PRODUCTS

The company now has two brands of ASCT and HEYI, more than 6 product patents, more than 100 current transformer models, giving customers more choices.

HEYI Factory KCT Type Split Core Current Transformer
HEYI Factory KCT Type Split Core Current Transformer
HEYI Factory DP Type Split Core Current Transformer
HEYI Factory DP Type Split Core Current Transformer
HEYI Factory CP Type Current Transformer
HEYI Factory CP Type Current Transformer
RDC Residual Current sensor HYCA-01
RDC Residual Current sensor HYCA-01
RDC Residual current sensor HYCA-03
RDC Residual current sensor HYCA-03
RDC HYCA-08 Residual Current Sensor
RDC HYCA-08 Residual Current Sensor
Flexible Rogowski coil FRC HEYI ASCT
Flexible Rogowski coil FRC HEYI ASCT
ICT Type Isolating Current Transformer
ICT Type Isolating Current Transformer
HEYI extend current transformer RECT-38A type
HEYI extend current transformer RECT-38A type
HEYI extend current transformer RECT-66A type
HEYI extend current transformer RECT-66A type
HEYI extend current transformer RECT-78A type
HEYI extend current transformer RECT-78A type
CT5 Type three phase current transformer
CT5 Type three phase current transformer

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LATEST NEWS

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How Engineers Select Split Core Current Transformers

How Engineers Select Split Core Current Transformers

Mar 14, 2026

In modern power systems, split core current transformers have become a go-to solution for engineers who need accurate current measurement without interrupting existing circuits. Whether used for energy monitoring, industrial automation, or protection systems, selecting the right CT requires careful evaluation of electrical performance, mechanical design, and system compatibility. In this guide, we’ll walk through […]

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Can Three-Phase CTs Be Directly Matched with MCCBs?

Can Three-Phase CTs Be Directly Matched with MCCBs?

Mar 11, 2026

Can three-phase current transformers be directly matched with molded case circuit breakers? A practical guide for switchgear manufacturers. In low-voltage power distribution systems, switchgear manufacturers typically require compact and reliable current measurement and protection solutions. A common problem in switchboard design is: Can a three-phase current transformer be directly matched with a molded case circuit […]

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Why HYCA-01 residual current detection module Ideal for EV Charging Stations in Tropical Regions?

Why HYCA-01 residual current detection module Ideal for EV Charging Stations in Tropical Regions?

Mar 04, 2026

HYCA-01 Residual Current Detection Module: A reliable leakage current monitoring solution for EV charging stations in tropical regions such as Malaysia. With the rapid development of electric vehicle infrastructure in Southeast Asia, the electrical safety of EV charging systems has become increasingly important. In tropical countries such as Malaysia, Thailand, Indonesia, and Singapore , power […]

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Split-Core vs Integrated 4-20mA Current Transmitter in Korea IoT Gateway

Split-Core vs Integrated 4-20mA Current Transmitter in Korea IoT Gateway

Feb 25, 2026

Two-wire current transmitter: Integrated vs. Split type —In-depth analysis current transmitter of Korean IoT energy monitoring and smart power distribution market In Korea’s industrial and building energy management systems, current monitoring devices are rapidly upgrading from traditional meters to real-time data nodes that can be connected to IoT gateways. Especially in BEMS, FEMS, smart factories, […]

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