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relay Product List and Ranking from 9 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

relay Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. 泰和電気工業 本社 Tokyo//Industrial Electrical Equipment
  2. 藤川伝導機 Tokyo//Industrial Machinery
  3. 品川測器製作所 Tokyo//Industrial Machinery
  4. null/null
  5. 5 東邦製作所 Tokyo//Industrial Machinery
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relay Product ranking

Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.

  1. Grid connection relay for self-consumption solar power generation equipment 'TRG-DV40' 泰和電気工業 本社
  2. Mitsubishi Digital Protective Relay "MELPRO-A Series" 藤川伝導機
  3. High Voltage Ground Fault Relay "HGF Series" 泰和電気工業 本社
  4. Ground Fault Directional Relay "SHG Series" 泰和電気工業 本社
  5. 5 [Attention Electrical Chief Engineers] Relay Lineup

relay Product List

1～15 item / All 17 items

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Area-type flow relay "Flow Relay Series"

Area-type flow relay "Flow Relay Series"

Operates during flowing water and water stoppage! Equipment necessary to maintain safe operating conditions such as starting and stopping the machinery.

The "Flow Relay Series" is a flow relay necessary for maintaining safe operating conditions such as the startup and shutdown of equipment, by being installed in water supply pipelines for bearing housings, gear housings, cooling water, pump shaft seal water, fire-fighting water, and others, operating during water flow and water stoppage. The version with an indicator has an indicator point that allows the floating state of the float to be visible from the outside, enabling users to know the flow rate reference through the scale, and it is used for effective flow rate setting in pipelines. 【Features】 ■ Operates during water flow and stoppage ■ Necessary device for maintaining safe operating conditions such as equipment startup and shutdown ■ Allows users to know the flow rate reference through the scale ■ Used for effective flow rate setting in pipelines *For more details, please refer to the PDF document or feel free to contact us.

  • Flow Control

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Environmentally resistant relay for railways and similar applications Leach

Environmentally resistant relay for railways and similar applications Leach

Environmentally Resistant Relay for Railways and Similar Applications Leach

The Leach sealed relay, which operates reliably even under adverse conditions, has a strong track record in aircraft and has also gained significant trust in the railway sector, particularly in Europe.

  • relay

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Relay "Buchholz Relay"

Relay "Buchholz Relay"

A protective relay that detects internal faults in transformers and prevents serious accidents!

The "Buchholz relay" is a relay installed between the main tank of a transformer and the conservator to protect the transformer by detecting internal faults. It features a first contact (minor fault contact) that operates based on the amount of gas generated by minor faults, and a second contact (major fault contact) that operates based on the rapid flow of oil caused by major faults. 【Features】 ■ Protective relay that prevents serious accidents ■ Detects internal faults ■ Equipped with minor fault contact and major fault contact *For more details, please refer to the catalog or feel free to contact us.

  • Power Monitoring Equipment

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Static Overcurrent Relay "TOC Series"

Static Overcurrent Relay "TOC Series"

Easy protection coordination! You can choose from 4 limited-time features and 3 instant stage features.

The "TOC Type Series" is a stationary overcurrent relay that complies with JIS C 4602 standards. It ensures mounting compatibility with conventional models. It has high reliability due to automatic monitoring (constant monitoring of internal circuits and automatic inspection of output circuits). Additionally, it supports operation through multifunctional displays on the LED indicator. 【Features】 ■ Compliant with JIS C 4602 standards ■ Stable protection characteristics through digital computation ■ High reliability due to automatic monitoring (constant monitoring of internal circuits and automatic inspection of output circuits) ■ Operational support through multifunctional displays on the LED indicator ■ Easy setting *For more details, please refer to the PDF materials or feel free to contact us.

  • Circuit breakers and switches

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System connection ground overvoltage relay / reverse power relay 'TVG type / TRG type'

System connection ground overvoltage relay / reverse power relay 'TVG type / TRG type'

Stable protection characteristics through digital operation! A simple UVR for power outage detection is implemented.

The "TVG type / TRG type" is a system interconnection ground fault overvoltage relay and reverse power relay with high reliability due to automatic monitoring. It comes standard with a backup power supply for outage compensation. The operation lock can be set using either the adjustment knob for each relay element or external control. Additionally, function settings can be configured using dip switches, and adjustment values can be selected with a rotary knob, making setup easy. 【Features】 ■ Stable protection characteristics through digital computation ■ High reliability due to automatic monitoring (constant monitoring of internal circuits and automatic inspection of output circuits) ■ Operational support through multifunctional display on LED indicators ■ Easy setup ■ Standard backup power supply for outage compensation *For more details, please refer to the PDF document or feel free to contact us.

  • Circuit breakers and switches

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Grid connection relay for self-consumption solar power generation equipment 'TRG-DV40'

Grid connection relay for self-consumption solar power generation equipment 'TRG-DV40'

Stable protection characteristics through digital processing! Standard equipped with power outage compensation backup power supply.

The "TRG-DV40" is a grid connection relay for self-consumption solar power generation systems, equipped with essential elements for high-pressure interconnection: OVGR, RPR, and backup power supply as standard. Operation locking can be set via adjustment knobs for each relay element and can also be controlled externally. Function settings can be configured using dip switches, and set values can be selected using a rotary knob. The recovery method can be individually set for OVGR and RPR to automatic/manual, making it compatible with power conditioners (PCS) both domestically and internationally. 【Features】 ■ Mountable on the panel surface (DIN rail or screw-mounted) ■ Clamp-type CT installed on the secondary side of existing CT ■ Output contacts are independent C contacts ■ Equipped with self-diagnosis function *For more details, please refer to the PDF document or feel free to contact us.

  • Solar power generator

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Phase detection relay "S-25N5 type" (common for 50Hz and 60Hz)

Phase detection relay "S-25N5 type" (common for 50Hz and 60Hz)

The phase difference, voltage difference, VA, and VB can be switched for display using the selection switch! The rated voltage is 100V.

The "S-25N5 type" is a phase detection relay used in self-owned AC substations, which measures the phase difference between different power sources and the voltage vector difference. When the set conditions are met, the contact output circuit turns ON and outputs the results. It has a serial transmission output function (USB connection) that allows the output of each power supply voltage, voltage difference, and phase difference to a computer as needed. 【Features】 ■ Measures the phase difference and voltage vector difference between different voltage sources in substations, etc. ■ Equipped with a serial transmission output function, allowing data to be output to a computer as needed. *For more details, please refer to the PDF materials or feel free to contact us.

  • others

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Hasegawa Electric Industry Co., Ltd.

Hasegawa Electric Industry Co., Ltd.

We pursue the visualization of electricity.

Modern society has developed significantly alongside the advancement of electronics. However, we cannot overlook the disasters such as personal accidents and fires caused by improper handling of electrical equipment. We at HASEGAWA, as a pioneering manufacturer of ground fault protection relays and voltage testers, will continue to contribute to a comfortable and safe electronics society by realizing this with HASEGAWA's technological capabilities.

  • others

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Mitsubishi Digital Protective Relay "MELPRO-A Series"

Mitsubishi Digital Protective Relay "MELPRO-A Series"

Meeting the needs of the times! Strongly supporting design, operation, and maintenance with high reliability and new features.

The "MELPROTM-A Series" is a Mitsubishi digital protective relay that newly incorporates a three-stage characteristic into the instantaneous element of OCR. It can operate with currents below the instantaneous setting value (in four stages from 20% to 80%), making it easy to consider protection coordination with distribution substations. A single ZVT can supply zero-sequence voltage to multiple protective relays. 【Features】 ■ Supports diverse protection coordination ■ Expanded number of connections from ZVT ■ Complies with advanced standards ■ Easy to update from conventional models ■ High operability and visibility design *For more details, please download the PDF or feel free to contact us.

  • 三菱ディジタル形保護継電器『MELPROTM-Aシリーズ』2.png
  • Other electronic parts

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Relay "New Type Pitot Relay"

Relay "New Type Pitot Relay"

It can accommodate a variety of contact specifications that conventional pitot relays could not cover!

The "New Type Pitot Relay" is a relay that is installed on the connecting pipe between the transformer body and the conservator, designed to detect abnormalities inside the tank and protect the transformer from accidents. It is equipped with a light fault contact for detecting minor abnormalities and a heavy fault contact for detecting major failures. While retaining the features of conventional Buchholz relays, it incorporates a Pitot tube internally, resulting in an even more earthquake-resistant structure. This relay, which enhances the reliability of transformers, is widely used in important substations both domestically and internationally. 【Features】 ■ Maintains the performance of the conventional earthquake-resistant Pitot relay ■ More cost-effective and lightweight ■ Abundant contact specifications ■ Compatible with various flanges *For more details, please refer to the catalog or feel free to contact us.

  • Other energy equipment

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Relay "Oil Level Gauge and Oil Level Relay"

Relay "Oil Level Gauge and Oil Level Relay"

For managing the oil level for bearing cooling in waterwheel generators, it indicates the oil level position and detects oil level abnormalities.

The "Oil Level Indicator and Oil Level Relay" indicates the oil level position and detects oil level abnormalities. It has a structure that turns a micro switch ON-OFF through the up and down movement of a float that follows the oil level. It is used for oil level management in bearing cooling for hydroelectric generators and detects abnormalities in the oil level. 【Features】 ■ Indicates the oil level position and detects oil level abnormalities ■ Turns the micro switch ON-OFF with the up and down movement of a float that follows the oil level ■ Used for oil level management in bearing cooling for hydroelectric generators, etc. *For more details, please refer to the catalog or feel free to contact us.

  • Other energy equipment

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Transformer protection device for vehicles

Transformer protection device for vehicles

Introducing "Vehicle Transformer Protection Devices" handled by Shinagawa Instrument Manufacturing!

The technical expertise and know-how that our company has accumulated over many years in the field of large transformers for ground use are also widely utilized in "transformer protection devices for vehicles," which require high durability and vibration resistance. We offer a lineup that includes the "automatic reset pressure relief valve," which captures pressure increases inside the transformer and instantly releases pressure, as well as "dial thermometers." 【Features】 <Automatic Reset Pressure Relief Valve> ■ Opens the valve to reduce pressure when the internal pressure of the transformer exceeds the specified level. ■ Automatically closes the valve and resets when the pressure drops to a certain level. *For more details, please refer to the PDF materials or feel free to contact us.

  • Other inspection equipment and devices
  • Transformers
  • others

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Ground Fault Directional Relay "SHG Series"

Ground Fault Directional Relay "SHG Series"

Ensures installation compatibility with conventional M series models! Supports operation through multifunctional display.

The "SHG Series" is a ground fault direction relay with stable protection characteristics achieved through digital computation. The multifunctional display of the LED indicator, including setting values, measurement values, elapsed time, and error codes, supports operation. Additionally, the front cover can be opened and closed from either side. It also ensures installation compatibility with the conventional M series models. 【Features】 ■ Compliant with JIS C 4609 standards ■ Stable protection characteristics through digital computation ■ High reliability due to automatic monitoring (constant monitoring of internal circuits and automatic inspection of output circuits) ■ Easy setting ■ Stores data from 5 operational instances *For more details, please refer to the PDF materials or feel free to contact us.

  • Circuit breakers and switches

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High Voltage Ground Fault Relay "HGF Series"

High Voltage Ground Fault Relay "HGF Series"

Function settings can be configured using a dip switch! The front cover can be opened and closed from either side.

The "HGF Shape Series" is a high-voltage ground fault relay that has stable protection characteristics due to its static circuit. It complies with JIS C 4601 standards. The setting values can be easily selected using a rotary knob, making configuration straightforward. Additionally, it ensures mounting compatibility with conventional M series models. 【Features】 ■ Compliant with JIS C 4601 standards ■ Stable protection characteristics due to static circuits ■ Easy configuration ■ The front cover can be opened and closed from either side ■ Ensures mounting compatibility with conventional M series models *For more details, please refer to the PDF materials or feel free to contact us.

  • Circuit breakers and switches

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