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This section provides an overview for zero flux current transformers as well as their applications and principles. Also, please take a look at the list of 10 zero flux current transformer manufacturers and their company rankings. Here are the top-ranked zero flux current transformer companies as of December, 2024: 1.Xiamen ZTC Technology Co., Ltd, 2.Beijing GFUVE Electronics Co., Ltd., 3.Div. Morlan & Associates, Inc..
Table of Contents
A zero flux current transformer is a device used to detect the current value called the zero phase current in a three-phase AC power supply.
The sum of the vectors of the currents flowing in each phase of a three-phase AC power supply is normally symmetrical and thus zero, but when a ground fault current flows, the balance is disturbed and a non-zero value is obtained.
In the event of a ground fault, a zero flux current transformer is activated to immediately disconnect the fault location from the surrounding electrical circuit.
For this reason, they are built into RCDs in advance and constantly play a role in detecting accidents.
When an electrical circuit in an electrical facility is electrically connected to the earth, a large current flows into that point as an earth fault current, and there is a risk of a serious accident.
Zero flux current transformers are used to prevent this, and when a ground fault current is detected, the ground fault point is immediately disconnected from the surrounding area.
Although also used for low-voltage general instrumentation, the role of the zero flux current transformers becomes more important as it is essential for higher voltage circuits, where the severity of the accident may be greater.
In a three-phase AC power supply, if the currents flowing in each of the three phases are equal and symmetrical, the sum of their vectors is zero.
The average value of the sum of the vectors is called the "zero-phase current," and in the symmetrical form shown above, the zero-phase current is zero.
If a ground fault current flows in any of the three phases, the three phases are unbalanced and the zero-phase current is not zero. This allows for the immediate detection of ground faults.
"Zero flux current transformers" are a device that detects this kind of zero-phase current in a three-phase AC power supply.
Like ordinary current transformers, it has a structure in which a coil is wound around a circular iron core, and a conductor penetrates through the center of the ring.
However, while a normal current transformer has only one through conductor, zero flux current transformers have three through conductors for each of the three phases.
If the current balance of the three phases is disturbed for any reason, a secondary current flows momentarily through the coil, and this is detected as a ground fault.
It is often built into RCDs together with relays and circuit breakers and plays an important role in preventing leakage currents that can lead to accidents, fires, and other disasters.
*Including some distributors, etc.
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Div. Morlan & Associates, Inc. established in 1977, and headquartered in Hilliard, OH are a manufacturer and supplier of a large selection of Transformers, Transducers, Meters, and more for measurement, monitoring, and control of current, power, and energy applications. The portfolio of the company includes Split-Core Current Transformers, Current Transducers, Low-Voltage Potential Transformers, Panel Meters, Average RMS Transformers/Transducers, and many more. The Thermal Rating Factor is designated for current transformers and is the factor by which the rated primary current is multiplied to obtain the maximum allowable primary current without exceeding temperature rise standards and accuracy requirements.
Wuxi Liou Electronics Co., Ltd. is a manufacturer of current transformers, founded in 2002 and located in Wuxi, Jiangsu, China. The company's products range include zero flux current transformers, split core current transducers, and hall effect sensors. Its products, such as its zero sequence transformers, are used in relay protection applications, and its hall current sensor IC are used for EV chargers. The ISO 9001:2015 certified company provides a line of standard design products and also offers custom manufacturing services.
Jiangsu Acrel Electrical Manufacturing Co., Ltd., founded in 2003 and headquartered in Wuxi City, China, is a manufacturer of electrical equipment for power monitoring and energy management. The company provides energy efficiency management products and power security system solutions in order to improve power quality and electrical safety for smart grid users.The electrical equipment offered by the company include sensors and transformers for power monitoring and control, energy meters for energy management and various cloud platforms for substation automation and power management. The company has multiple product test centres for various tests on environment, electromagnetic compatibility, safety and reliability.
Shandong YUANXING Electronics Co., Ltd, founded in 1998, is an ISO 9001:2015 certified manufacturer of current transformers, voltage transformers, and insolation solutions for the energy, electric power, industrial control, and telecommunication industries based in Shandong, China. The company's range of products includes partial discharge current sensors and transducers, miniature voltage and current transformers, split core current transformers as well as instrument current transformers and inductors used for various applications such as mobile devices and remote keyless systems in automobiles.
Beijing GFUVE Electronics Co., Ltd., established in 2005, is an ISO 9001-certified manufacturer of energy meter test products and high voltage ammeter recorders based in Beijing, China. The company offers a wide range of products including reference standard meters, electrical calibrators, split core current transformers as well as energy meter test equipment, and power quality analyzers used to locate, predict, prevent, and troubleshoot power quality problems in single and three-phase power distribution systems. GFUVE supplies to customers worldwide including the Middle East and Africa.
Tianjin Carel Tech Co., Ltd is an ISO 9001-certified manufacturer and exporter of various transformers, power supplies, adaptors, and inductors based in Tianjin, China. The company offers a wide range of products including Current Transformers, Shaded Pole Motors, Magnetic Transformer Inductors, and Class 2 Power Adaptors with customized plugs for use in high dust or dumb environment. The company supplies to customers worldwide including major markets such as Europe and North America.
Xiamen ZTC Technology Co., Ltd (Zentar), established in 1993, is a manufacturer of current transformers, based in Xiamen, China. With over 30 years of expertise, they have over 250 dedicated workers produce more than 2000 customized products for electrical safety and electric measuring needs of their customers. The company has an ISO 9001, ISO 14001, and IATF16949 certified factory. Their processes are not only UL ETL CE CCC certified but also in compliance with RoHS REACH. They manufacture advanced current transformers for EV charging modules, GFCI, RCD, and wireless energy monitors, contributing to safer electrical practices.
HBK, formerly named HBM, is a global ISO9001 and ISO14001-certified company founded in 1950. It is known for providing the best technology and expertise in test and measurement. With branches in 30 countries, it provides clients with different solutions ranging from sound and vibration to propulsion efficiency and weighing. Examples of product offerings include transducers, amplifiers, sensors, strain gauges, data acquisition systems, etc. Such products are used in different markets, including aerospace, automobiles, telecom audio, and more. Besides supplying products, they also entertain their customers with after-sales services.
Acrel Co., Ltd. founded in 2003, is a manufacturer and supplier of electrical measurement and controller systems located in Shanghai, China. The ISO 9001:2008 certified company specializes in energy management and monitoring systems, electrical components, and electrical measurements. Its product line includes power monitoring and controlling systems, energy meters, and current transformers. The company offers solutions for energy efficiency management and electrical safety. Companies like Jiangsu Acrel Electrical Manufacturing Co., Ltd and Chengdu Acrel Co., Ltd are subsidiaries of the company.
Shenzhen Hangzhi Precision Electronics Co., Ltd is a manufacturer and supplier of high-precision current/voltage transducers and testers. The company was founded in 2017 and is located in Shenzhen, China. The company employs technologies such as multi point zero-flux and flux excitation close-loop control to create products. Its products range include HCV high precision voltage transducers, BMS automotive current sensors, and PSM electrical standard testers. The ISO 9001:2015 certified company serves the medical equipment, railway, and renewable energy industries.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Xiamen ZTC Technology Co., Ltd |
16.3%
|
| 2 | Beijing GFUVE Electronics Co., Ltd. |
14.3%
|
| 3 | Div. Morlan & Associates, Inc. |
14.3%
|
| 4 | Hottinger Brüel & Kjær |
12.2%
|
| 5 | Yuanxing Electronics Co.,Ltd. |
10.2%
|
| 6 | Jiangsu Acrel Electrical Manufacturing Co., Ltd. |
10.2%
|
| 7 | Shenzhen Hangzhi Precision Electronics Co., Ltd. |
8.2%
|
| 8 | Wuxi Liou Electronics Co.,Ltd |
6.1%
|
| 9 | Tianjin Carel Tech Co.,Ltd |
6.1%
|
| 10 | Acrel Co, Ltd. |
2.0%
|
Derivation Method
The ranking is calculated based on the click share within the zero flux current transformer page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
8 | 88.9% |
|
United States of America
|
1 | 11.1% |
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