21 Earth Leakage Relay Manufacturers in 2024
This section provides an overview for earth leakage relays as well as their applications and principles. Also, please take a look at the list of 21 earth leakage relay manufacturers and their company rankings. Here are the top-ranked earth leakage relay companies as of November, 2024: 1.TME, 2.Binex, 3.SEIKO ELECTRIC CO.,LTD..
Table of Contents
Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
What Is an Earth Leakage Relay?
An earth leakage relay is a mechanical device used to detect the presence of leakage current in an electrical circuit.
They are also called ground fault relays. Electric circuits are generally insulated from the surrounding environment by insulating resins such as polyethylene or vinyl.
When a part of an electric circuit comes into contact with a conductive object due to damage to the insulation and electricity flows, this is called leakage current. Accidentally touching a leaky electric circuit or surrounding metal can cause an electric shock to the human body, resulting in personal injury. If electricity travels through the steel frame of a building, it can also cause a fire, so care must be taken.
The use of earth leakage relays to cut off the power supply or to issue an alarm prevents the above phenomena.
Uses of Earth Leakage Relays
Earth leakage relays are used in many electrical circuits. The following are examples of applications of earth leakage relays:
1. Ground-Fault Circuit Breakers
RCDs are devices that automatically shut off the power supply when a leakage is detected. RCDs are generally used in low-voltage circuits and are also installed inside distribution boards for home use.
2. Inside a Cubicle
A cubicle is an enclosure for power supply and demand with a high-voltage transformer and circuit breaker built inside, and is used in supermarkets and public facilities. Inside the cubicle, leakage current fire alarms and other devices are built in to detect leakage currents at an early stage.
3. For Controlling Gas-Insulated Switchgear (GIS) And Vacuum Circuit Breakers in Substations
Substations handle electricity at voltages higher than high voltage, so vacuum circuit breakers are used to energize and disconnect the electricity. Since these devices do not have a function to detect leakage current, they are controlled by a combination of Earth Leakage Relays.
Principle of Earth Leakage Relay
There are several principles by which earth leakage relays can detect leakage current.
1. In the Case of Direct Current
When DC voltage is the target, there is a method of detecting the voltage to ground. Generally, the middle point between the two terminals of a DC circuit is 0 V to ground, but when a leakage current occurs, the ground-faulted wiring terminal side becomes 0 V to ground. Therefore, leakage current can be detected by measuring the ground voltage at both terminals.
2. In the Case of Alternating Current
In the case of alternating current, it can also be detected by measuring the reciprocating current. In general, the sum of the reciprocating currents in an electric circuit is equal, but when a ground fault occurs and a current flows between the two terminals, the sum of the reciprocating currents is not equal. Therefore, leakage current can be detected by measuring the round-trip current and checking if it is balanced.
3. Zero-Phase Current
There are other methods to measure zero-phase current. Magnetic fields are always generated around cables carrying alternating current, but they are characterized by the fact that they cancel each other outward and inward.
When a ground fault occurs, one of the magnetic fields becomes stronger than the other, so they can no longer completely cancel each other out, resulting in a zero-phase current due to the magnetic field. By checking this zero-phase current, leakage current can be detected.
Types of Earth Leakage Relays
There are two main types of earth leakage relays: non-directional and directional. Both types of relays use a zero-phase current transformer to measure the zero-phase current to determine if there is a leakage current and send a leakage current signal to the circuit.
1. Non-Directional Earth Leakage Relay
This is a mechanism to detect the accident current in case of leakage current by a zero-phase current transformer. It is also called a ground relay.
Currents in a three-phase AC circuit are divided into three types: positive-phase current flowing in the positive direction on each line, reverse-phase current flowing in the reverse direction, and zero-phase current flowing in the same phase. Since zero-phase current flows in the case of leakage current, leakage current can be checked with a zero-phase current transformer.
The non-directional type only checks for ground faults, so there is a risk of malfunction if a ground fault occurs in the upper system, etc.
2. Directional Earth Leakage Relay
This system detects the fault current in the event of a ground fault by means of a zero-phase current transformer and a zero-phase voltage detector. It is also called a directional ground relay.
A zero-phase voltage detector is a device that detects zero-phase voltage by means of a capacitor inside the device. The zero-phase voltage is normally 0 V, but a voltage is generated in the event of a ground fault.
This voltage is divided by a series-connected square-phase capacitor and a detection capacitor, and the voltage across the detection capacitor is further reduced by a transformer. The earth fault direction relay detects the direction of the earth fault. Therefore, it does not malfunction when a ground fault occurs in the upper system, but only interrupts the ground fault that occurs in its own system.
List of 21 Earth Leakage Relay Manufacturers
*Including some distributors, etc.
Sort by Features
- Default
- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
Sort by Area
- India
- Italy
- Japan
- Poland
- Republic of Korea
- Turkey
- United Kingdom
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LOVATO Electric S.p.A.
Earth Leakage Relays
Manufacturer Overview
LOVATO Electric S.p.A., founded in 1922 and based in Bergamo, Italy, is a manufacturer and designer of low-voltage electrical devices for industrial applications. The company offers a wide range of products such as Motor Protection circuit breakers, Contractors, electromechanical starters and relays, variable speed drives, and soft starters among others. The company holds UNI ISO 45001: 2018, ISO 1400: 2015, and ISO 50001: 2018 certificates. The company’s laboratories are certified to conduct type testing under ACAE control to issue ACAE certifications which are recognized by the European Union and valid across the wold.
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TERASAKI ELECTRIC CO.,LTD.
Earth Leakage Relays
Manufacturer Overview
Terasaki Electric Co., Ltd., established in 1923, and headquartered in Osaka, Japan, is a manufacturer and a supplier of motor control systems, circuit breakers, and electronic devices. The company offers a diverse range of products such as marine systems like power distribution systems, control and monitoring systems, and more. It also provides circuit breakers including molded case and air circuit breakers, as well as medical devices and engineering & lifecycle services. The company adheres to ISO13485 certification for medical devices and complies with other industry standards such as JIS and IEC for its products.
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Binex
Earth Leakage Relays
Manufacturer Overview
Binex, founded in 1997 and based in Dapodi, Pune, Maharashtra is a manufacturer of Industrial 4.0 IOT Based Products. The company is known for the production of revolving lamps, safety radar sensors, REER products, ILME connectors, halogen lamps and micro detectors. The company started as a single-product venture and now has a wide product range catering to the automation industries, control panel, machine and tool manufacturing industries. The company’s clients are corporates like Apollo, Cipla, Exide, Forbes Marshall, Honeywell, Fiat and Jindal Steel. The company also manufactures Wi-Fi Hooters, Andon Display Electronic products and LED tower lamps.
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Fuji Electric FA Components & Systems Co., Ltd.
Earth Leakage Protective Relays
Manufacturer Overview
Fuji Electric FA Components & Systems Co., Ltd., established in 2008, the company is a result of a merger between Fuji Electric FA Components & Systems and the Japanese arm of Schneider Electric S.A., the second largest manufacturer in the same field, is a manufacturer of control instruments, such as electromagnetic switches that use electromagnets to open and close the contact points of electrical circuits. The company have a global presence, offering many power-receiving and distributing devices that can be used in cross-border markets through its wide range of products that conform to major standards in the world.
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Hoyt Electrical Instrument Works Inc.
Earth Leakage Relays
Manufacturer Overview
Hoyt Electrical Instrument Works Inc., established in 1904, is a manufacturer of analog and digital panel meters, transformers, shunts, switches, and personal safety devices, located in Penacook, New Hampshire, the United States. The company’s products are designed to meet and exceed industry standards. It offers a wide range of test and measurement instruments, making its a comprehensive solution for customers’ needs. It is not only an analog panel manufacturer, but also has evolved to provide value-added custom solutions that keep the world spinning in the right direction.
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SEIKO ELECTRIC CO.,LTD.
Earth Leakage Relays
Manufacturer Overview
SEIKO ELECTRIC CO.,LTD., founded in 1921 and headquartered in Fukuoka, Japan, is a manufacturer specializing in electrical and control systems. It offers environmental energy and control systems, including solar power and battery energy storage systems, and information and control systems like factory and building automation. These products find applications across various sectors, spanning utilities, manufacturing, transportation, and commercial buildings. The company's diverse range is designed to facilitate electrical power generation, transmission, distribution, control, and energy management, ultimately enhancing efficiency and reducing energy consumption in these industries.
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Hager Ltd
Earth Leakage Relays
Manufacturer Overview
Hager Ltd., established in 1955 and headquartered in Blieskastel, Germany, is a manufacturer of electrical installations tailored for use in residential, commercial, and industrial buildings. The company's product range includes meter space systems, distribution systems, switching and protection devices, energy management and monitoring solutions, and cable routing and room connection systems. These products cater to various applications, including energy distribution and metering systems, cable management systems for power and data distribution, and building security systems. The company supplies products from other brands such as Berker, Bocchiotti, Elcom, and E3/DC. It has 22 manufacturing sites in 10 countries worldwide.
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Omron
K6EL
Manufacturer Overview
Omron Corporation, started in 1933 and headquartered in Kyoto, Japan, is a manufacturer of automation components, equipment, and systems, and it developed the first contactless proximity switch in 1960. It has four domains, including industrial automation, electronic components, healthcare, and social systems, and it provides products and services in around 120 countries and regions. Some of its products include microsensing devices, access control systems, industrial robots, surveillance cameras, and blood pressure monitors. In 1971, it developed the first online cash machine, and in 1972, it established Japan’s first welfare factory.
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Company Overview
General Industrial Controls Private Limited is a manufacturer and supplier of process control, automation and instrumentation products that was established in 1972, based in Pune, India. Timers, outlets, switches, extension cables, and light bulbs are among the company's product offerings. The products offered by the company are advanced, convenient, and simple to use. It is designed to accommodate diverse illumination control, power management, and outdoor living requirements. The products are extensively utilized in residences, offices, garages, and gardens.
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Vteke Electric
Earth Leakage Relays
Company Overview
VTEK Elektrik is a manufacturer and distributor of electrical systems and components based in Istanbul, Turkey. The company was established in 1985 and has a specialized product portfolio including transformers, and protection relays. miniature relays, cam switches, and converters. These primarily supply clients in the power generation, renewable energy, and industrial automation industries. From its state-of-the-art facility, the company also offers a range of services, such as commissioning, quality control, calibration, and prototyping. VTEK Elektrik is ISO 9001:2015 certified and has an international presence with distributors in different countries.
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SOURABH ENGINEERS & CONSULTANT
Earth Leakage Relays
Company Overview
Sourabh Engineers and Consultant, located in Jaipur, Rajasthan and founded in 2005 is a manufacturer, supplier, and wholesale distributor of electric and electronic products. The company manufacturers products like electronic relays, circuit breakers, power bus trunkings, and power contractors. The state-of-the-art infrastructure, expertise and diverse experience of the teams make them manufacturers of superior-quality products. The products are used in thermal, hydro and nuclear power plants, railway projects, and cement plants.
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Asian Glacier Industries
Earth Leakage Relays
Company Overview
Asian Glacier Industries, located in Ahmedabad, Gujarat and founded in 2018 is a manufacturer of water level controllers and circuit breakers. The company is pro in manufacturing Earth leakage circuit breakers, fan regulators, electric MCB, motor starters, electric RCCB, water level sensors and street light timers. The company is also a wholesale distributor of circuit breakers, regulators, motor starters, MCB and RCCB. Mr Jay Kumar, owner of the company and it is a sole-proprietorship firm and has been awarded by Indiamart.
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Company Overview
TME, established in 1989 and headquartered in Łódź, Poland, is a distributor specializing in electronic and electromechanical components, measurement and instrumentation equipment, tools, accessories, and development kits. Its product range encompasses resistors, capacitors, switches, multimeters, tools, and microcontroller development kits. TME serves diverse clientele, including electronics manufacturers, hobbyists, and educational institutions. The company offers support to an array of businesses and organizations in procuring essential components and equipment for electronic projects and manufacturing needs.
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Chi-Tak Electrical Sdn. Bhd.
Earth Leakage Relays
Company Overview
Chi-Tak Electrical Sdn. Bhd, founded in 1987 and located in Pulau Pinang, Malaysia is a supplier of electrical & electronic components for commercial projects. The company specialises in the supply of socket outlets, Hager muse wall switches and LED street lamps and distributes through brands like Autonics, Cikachi, Hager, Isotech, e-tan, Mega Kabel and control switchgear. The company also works as a trading unit, distributor and key stockist of power and control cables by local and international manufacturers. Headquartered in Johor Bahru, this company is located in multiple parts of Malaysia.
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Arrow Electronics, Inc.
Earth Leakage Relays
Company Overview
MikroElektronika, founded in 1991 and headquartered in Ljubljana, Slovenia, is a manufacturer and supplier of development tools and embedded systems. Their product range includes EasyPIC, AVR, and ARM development boards for efficient embedded systems development. They also offer sensor development kits containing components for building embedded systems that interact with the physical world. Additionally, MikroElektronika provides a diverse selection of software tools, such as compilers, debuggers, and emulators. Their products find applications in various industries, including automotive, industrial, and consumer electronics.
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Inelco International
Earth Leakage Relays
Company Overview
Inelco International, launched in 1999 and based in Delmas, South Africa is a manufacturer and supplier of conveyor protection and monitoring equipment for the mining industries. The company specializes in the design, production and supply of electronic products like hardware and cables of conveyor protection and monitoring systems, pilot control relays, flag relays and resistor monitor relays. The company is a supplier of interconnection and electronic components and systems for networking, telecommunications and automotive applications. The ISO 9001 – 004573 certified company also provides installation and commissioning services for different products.
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Earth Leakage Relay Manufacturer Ranking
*Including some distributors, etc.Ranking as of November 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | TME |
11.1%
|
| 2 | Binex |
10.2%
|
| 3 | Chi-Tak Electrical Sdn. Bhd. |
7.4%
|
| 4 | SEIKO ELECTRIC CO.,LTD. |
7.4%
|
| 5 | Frer srl |
6.5%
|
| 6 | Sahyadri Electro Controls |
5.6%
|
| 7 | SOURABH ENGINEERS & CONSULTANT |
4.6%
|
| 8 | GIC |
4.6%
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| 9 | Hoyt Electrical Instrument Works Inc. |
4.6%
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| 10 | Vteke Electric |
4.6%
|
Derivation Method
The ranking is calculated based on the click share within the earth leakage relay page as of November 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
- Fuji Electric FA Components & Systems Co., Ltd.: 2,572
- TERASAKI ELECTRIC CO.,LTD.: 1,994
- Sahyadri Electro Controls: 40
Newly Established Company
- Asian Glacier Industries: 2018 (6 years ago)
- Fuji Electric FA Components & Systems Co., Ltd.: 2008 (16 years ago)
- Sahyadri Electro Controls: 2006 (18 years ago)
Company with a History
- GIC: 1972 (52 years ago)
- DEESYS CO.,LTD: 1979 (45 years ago)
- Frer srl: 1980 (44 years ago)
Global Distribution of Earth Leakage Relay Manufacturers by Country
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
India
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5 | 35.7% |
Italy
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3 | 21.4% |
Japan
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2 | 14.3% |
Turkey
|
1 | 7.1% |
Poland
|
1 | 7.1% |
United Kingdom
|
1 | 7.1% |
Republic of Korea
|
1 | 7.1% |
