All Categories
History
This section provides an overview for voltage relays as well as their applications and principles. Also, please take a look at the list of 12 voltage relay manufacturers and their company rankings. Here are the top-ranked voltage relay companies as of April, 2025: 1.Vteke Electric, 2.Ningbo Kls Electronic Co., ltd., 3.Misensor Tech 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.
A voltage relay is a device that detects voltage changes in an electric circuit and transmits them to another circuit or device.
Its main purpose is to detect voltage fluctuations and abnormalities in power and control systems, controlling and protecting systems accordingly. Voltage relays typically transmit signals through electrically isolated circuits to enhance electrical safety and ensure insulation between different circuits.
These devices are crucial in high-voltage environments due to their high measurement accuracy and reliable operation. Their design allows for precise detection and response to specific voltage values.
Voltage relays are employed in various applications, particularly in power transmission, distribution, power generation, and substations.
In power systems, voltage relays protect against abnormal voltages by detecting overvoltage or undervoltage situations and either shutting down electricity or monitoring power quality.
Transformers use voltage relays to maintain proper voltage levels. Some transformers, equipped with tap-switchers, adjust output voltage automatically in response to supply voltage variations and power demand, as detected by voltage relays.
For generator safety and proper operation, voltage relays detect fluctuations or abnormalities, regulating voltage or interrupting circuits as needed. They are essential for controlling synchronous equipment and preventing overvoltage, undervoltage, and reverse power issues.
Voltage relays measure voltage through instrument transformers or similar devices. The input electrical signal is processed by a transformer circuit or similar device, which amplifies or modulates the signal to an appropriate level, adjusting its strength and range.
The processed signal is then converted to an analog or digital output, used for control or signaling purposes. In some designs, voltage relays are isolated between input and output circuits, using insulating materials and transformers for safety and circuit independence.
Various types of voltage relays exist, each serving specific functions:
An overvoltage relay activates when the voltage in a power system exceeds a specified range, generating a control signal to shut down the circuit or alert the controller, preventing equipment damage and overloads.
An undervoltage relay operates when the voltage drops below a set level, triggering a control signal to interrupt the circuit or signal a controller. It is crucial for preventing issues caused by undervoltage in power systems and ensuring the activation of backup power supplies.
A ground fault overvoltage relay responds to ground faults in a power system, detecting overvoltage due to ground faults and preventing equipment damage and electrical accidents. However, it's often used alongside ground fault direction relays and overcurrent overcurrent relays for comprehensive protection.
*Including some distributors, etc.
Sort by Features
Sort by Area
Ross Engineering Corporation, founded in 1964 and based in Campbell, California, is a manufacturer of a wide range of high-voltage electronic and electro-mechanical devices and is ISO 9001 certified. It stocks over 25 lines of high voltage devices such as voltmeters, relays, and probes used in several fields such as industrial plants, communication transmitters, and power supplies with ranges from 0.01mV to 1,200,000 V. The company is ISO/IEC 17025:2017 certified and has a calibration lab for testing and calibrating dividers, relays, and probes up to 450kV.
Nissin Electric Co., Ltd., established in Kyoto, Japan, in 1917, is a Supplier of electrical energy by substation equipment, and grid connection technology. The company provides factories and office buildings to realize the optimal operation of energy and technical support. They also provide industrial infrastructure, with an emphasis on power system and energy equipment. Their product range includes gas insulated switchgear, storage battery system, vehicle recognition system, high voltage test product and multiple environmental sensors.
HoverLabs has roots dating back to 1963 and is headquartered in Haryana, India. The company is a laboratory supplies manufacturer, exporting to over 110 countries. The company provides extensive R&D for designing, manufacturing, and packaging supplies. The company also provides customized product development, OEM support, and project management assistance. The company’s products include educational equipment, analytical lab equipment, engineering lab equipment, medical lab equipment, and other products used in the medical as well as scientific industries.
CNC Electric Group is a company that was established in the year 1988 and is based in Yueqing, Zhejiang, China. The company is a manufacturer of industrial appliances. They manufacture low voltage electrical products, power transmission and distribution equipment, DC series, and explosion-proof products. Additionally, they provide residential and commercial solutions, as well as industry, construction, and data center solutions. This company has certifications in ISO 9001, ISO 14001, CCC, OHSAS 18001, CE, CB, and SEMKO.
Ningbo Kls Electronic Co. Ltd is a manufacturer and supplier of components and parts for electronic devices established in 2002 and located in Ningbo, China. The company’s products include switches for controlling electronic circuits, connectors for joining circuits in assembly or installation processes, and cable assemblies for connecting multiple electronic devices. It also offers spare parts and replacement services for customers requiring additional support. The company is UL, VDE, and ROHS-certified, and mainly serves clients in the electronics and telecom industries.
Misensor Tech Co., Ltd., a company established in 2010, based in Shanghai, China, is a manufacturer and supplier of position and movement sensor solutions using reed switches, hall effect and MR technology. The company provides various products such as reed sensors, level sensors, reed relays, automotive sensors, fuel level sensors, flow sensors, and mini reed sensors. These products are used for various applications such as power protection, backup, security, test and measurement, medical and industrial fields. Its many experience and the proficiency to development of customers' specific items according to customers' specific requirements and applications.
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.
Fuji Electric Equipment Control was established in 2008 in Saitama-ken, Japan is a manufacturer of power distribution and control equipment. The company boasts an extensive and diversified product portfolio including motor controls, MV distributors, energy control equipment, LV distributors, and industrial control relays. These products find applications in construction as magnetic contactors, automotive as manual motor starters, home appliances as air circuit breakers, health care devices as sensors and switches, and in environmental management for quality assurance and protection of high-voltage electric power and management of low-voltage consumption rate.
Today, DSC-Electronics Germany supplies customers all over the world and offers the largest selection of models on the market, with over 255 customisable low and high-power power supplies (100W to 1MW) and ten product series. In mid-2018, the company moved into a new production facility in the centre of Bonn, further expanding its assembly and service capacities. Production to order makes it possible to implement almost any customer request quickly and effectively, which sets the company apart from other Europe-based competitors
AutomationDirect.com was founded in 1994 to provide solutions for the industrial automation market and has been growing its list of offerings ever since. AutomationDirects’ extensive catalog includes individual components such as cables, various controls, I/O devices, relays, gauges, fittings, and sensors to complete systems. Many parts and devices, especially PLC units are customizable. AutomationDirect.com also provides support via video instructions, online manuals, a learning library, an active community forum to further assist customers.
Ranking as of April 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Vteke Electric |
19.0%
|
| 2 | Ningbo Kls Electronic Co., ltd. |
14.3%
|
| 3 | Misensor Tech Co., Ltd. |
14.3%
|
| 4 | Zhejiang Zhongxin New Energy Technology Co., Ltd |
9.5%
|
| 5 | Zhejiang Meishuo Electric Technology Co.,Ltd |
9.5%
|
| 6 | Ross Engineering Corp. |
9.5%
|
| 7 | Nissin Electric Co., Ltd. |
9.5%
|
| 8 | CNC ELECTRIC GROUP CO.,LTD. |
4.8%
|
| 9 | HOVERLABS |
4.8%
|
| 10 | Fuji Electric Equipment Control |
4.8%
|
Derivation Method
The ranking is calculated based on the click share within the voltage relay page as of April 2025. 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
|
5 | 50.0% |
|
India
|
2 | 20.0% |
|
United States of America
|
1 | 10.0% |
|
Japan
|
1 | 10.0% |
|
Turkey
|
1 | 10.0% |
24 products found
24 products
Wave Energy Co., Ltd.
180+ people viewing
Last viewed: 1 day ago
Commercialization of two types of protective relays to suit different applications ■Mimamoru-kun UR Multimeter + Underpower Relay (UPR) + Reverse P...
Densei Comtech Co., Ltd.
170+ people viewing
Last viewed: 1 day ago
This is a device installed at power generation and substations that protects the power system by isolating and localizing (preventing the spread of...
Densei Comtech Co., Ltd.
160+ people viewing
Last viewed: 1 day ago
This device protects transformers and power transmission lines when installed at interconnection substations, and protects transformers and distrib...
Kyuden Techno Systems Co., Ltd.
230+ people viewing
Last viewed: 14 hours ago
■Protective device This is a microprocessor type device that quickly and accurately detects failures in power system transmission lines and distrib...
Kyuden Techno Systems Co., Ltd.
160+ people viewing
Last viewed: 1 day ago
■Protective device This is a microprocessor type device that quickly and accurately detects failures in power system transmission lines and distrib...
Kyuden Techno Systems Co., Ltd.
190+ people viewing
Last viewed: 1 day ago
■Protective device This is a microprocessor type device that quickly and accurately detects failures in power system transmission lines and distrib...
Wave Energy Co., Ltd.
160+ people viewing
Last viewed: 6 hours ago
Commercialization of two types of protective relays to suit different applications ■Mimamoru-kun UR Multimeter + Underpower Relay (UPR) + Reverse P...
Taiwa Electric Industry Co., Ltd.
130+ people viewing
Last viewed: 1 hour ago
■Summary Recessed type JIS C 8374-1991 standard compliant product
Taiwa Electric Industry Co., Ltd.
130+ people viewing
Last viewed: 3 hours ago
■Summary Economic type, embedded type, JIS C 8374-1991 standard compliant product
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 7 hours ago
■Summary Light and heavy 2-tier recessed type JIS C 8374-1991 standard compliant product
Taiwa Electric Industry Co., Ltd.
130+ people viewing
Last viewed: 2 hours ago
■Summary Ior method Measured value/maximum value display, single phase/phase embedded type analog output JIS C 8374-1991 standard compliant product...
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 1 day ago
■Summary 5 circuits, measured value/maximum value display, pre-alarm ■Features ・Compact size capable of monitoring earth leakage of up to 10 circ...
Taiwa Electric Industry Co., Ltd.
100+ people viewing
Last viewed: 4 hours ago
■Summary For low voltage ungrounded electrical circuits ■Features ・Ideal for solar power generation equipment connected with AC400V system ・Stab...
Taiwa Electric Industry Co., Ltd.
100+ people viewing
Last viewed: 23 hours ago
■Summary Power sales contract available OVGR embedded type Built-in power outage compensation 2C latch output ■Features ・Stable protection charac...
Taiwa Electric Industry Co., Ltd.
160+ people viewing
Last viewed: 14 hours ago
■Summary No electricity sales contract OVGR+RPR embedded type Built-in power outage compensation ■Features ・Stable protection characteristics by ...
Taiwa Electric Industry Co., Ltd.
130+ people viewing
Last viewed: 1 day ago
■Summary Vo-Io method for receiving power, embedded type, current trip/voltage trip ■Features ・Stable protection characteristics by digital calcu...
Taiwa Electric Industry Co., Ltd.
100+ people viewing
Last viewed: 14 hours ago
■Summary Current suppression method Embedded type Non-grounded/PC grounded system ■Features ・Suppression current method allows stable operation e...
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 3 hours ago
■Summary Recessed type current trip/voltage trip ■Features ・Stable protection characteristics due to static circuit ・Easy settings: function set...
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 1 hour ago
■Summary Highly reliable product with automatic monitoring function, embedded type ■Features ・Stable protection characteristics by digital calcul...
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 1 day ago
■Summary UVR with power outage compensation Highly reliable product with automatic monitoring function Built-in type ■Features ・Stable protection...
Taiwa Electric Industry Co., Ltd.
100+ people viewing
Last viewed: 17 hours ago
■Summary Plug-in type JIS C 8374-1991 standard compliant product ■Features ・Wide range of control power supply voltage AC80-264V ・Lighter 110g ...
Taiwa Electric Industry Co., Ltd.
110+ people viewing
Last viewed: 2 hours ago
■Summary Measured value/maximum value display JIS C 8374-1991 standard compliant product ■Features ・Recessed type with external size of 72mm squa...
