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Inverter Vfd Power Inverter Motor Protection Relay Voltage Regulator Soft Starter

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Long Life Safety Controller Schneider Xpsac5121p Relay for Manufacturing Line Protection

Long Life Safety Controller Schneider Xpsac5121p Relay for Manufacturing Line Protection

US $ 835 / Piece FOB
1 Piece (MOQ)
More
Main Products: Industrial Drive Frequency Converter, Mechanical Drive Frequency Converter, Standard Drive Frequency Converter, PLC Series, Soft Start Series, IEC Low-Voltage Motors
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Audited Supplier
Shiny-Control Technology Develop (Beijing) Co., Ltd.

Trading Company

Beijing, China Since 2020
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Ap750-L3 Fiber Optic Line Differential Protection Relay 32-Bit CPU 16-Bit Ad Sampling for 110kv Substation

Ap750-L3 Fiber Optic Line Differential Protection Relay 32-Bit CPU 16-Bit Ad Sampling for 110kv Substation

US $ 1,500-2,500 / Piece FOB
1 Piece (MOQ)
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Current : AC
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Shiny-Industry Technology Develop (Beijing) Co., Ltd.

Beijing, China Since 2024
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Strom Factory Middle Voltage Electronic Over Current Protection Relay for Electric Transformer/Power Line Auto Switch Function

Strom Factory Middle Voltage Electronic Over Current Protection Relay for Electric Transformer/Power Line Auto Switch Function

US $ 480 / Set FOB
1 Set (MOQ)
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Main Products: Secondary Devices For Substations, Power Plants, Transformers, Including Protection Relay, Power Meter, Online Monitoring And Measurement, Controlling Devices
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ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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Mv &Hv Switchgear St287fd Integrated Numeric Line Differential Protection Relay Generator Forindustrial Power Distribution

Mv &Hv Switchgear St287fd Integrated Numeric Line Differential Protection Relay Generator Forindustrial Power Distribution

US $ 800 / Set FOB
1 Set (MOQ)
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Current : DC
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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St260 Subminiature 1A Switch High-Power Industrial Backup Protection Relay General Purpose Line Distance Protection for Sealed Factory

St260 Subminiature 1A Switch High-Power Industrial Backup Protection Relay General Purpose Line Distance Protection for Sealed Factory

US $ 500 / Set FOB
1 Set (MOQ)
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Main Products: Secondary Devices For Substations, Power Plants, Transformers, Including Protection Relay, Power Meter, Online Monitoring And Measurement, Controlling Devices
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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Acrel Am5se Line/Feeder Protection Relay with Electrical Measurement Function

Acrel Am5se Line/Feeder Protection Relay with Electrical Measurement Function

US $ 777 / Piece FOB
1 Piece (MOQ)
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ACREL CO., LTD.

Manufacturer/Factory & Trading Company

Shanghai, China Since 2019
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Am5se Medium Voltage Mv Line Protection Relay

Am5se Medium Voltage Mv Line Protection Relay

US $ 777-1,036 / Piece FOB
1 Piece (MOQ)
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Main Products: Power Meter, Energy Meter, WiFi Meter, RS485 Modbus-RTU Meter, Multifunction Relay, Motor Protection Relay, Busbar Temperature Sensor, Power Tag, Insulation Monitor, Current Sensor
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Audited Supplier
Jiangsu Acrel Electrical Manufacturing Co., Ltd.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2020
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Strom St280 RS485 Protection Relay Industrial Power Distribution Relayfor Overcurrent 50/51)Supervision for Line Feeder Factory

Strom St280 RS485 Protection Relay Industrial Power Distribution Relayfor Overcurrent 50/51)Supervision for Line Feeder Factory

US $ 1,000 / Set FOB
1 Set (MOQ)
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ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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Factory OEM Provided High Voltage Distance Protection Relay Transmission Line50/60Hz Mv&Hvpower

Factory OEM Provided High Voltage Distance Protection Relay Transmission Line50/60Hz Mv&Hvpower

US $ 299 / Set FOB
1 Set (MOQ)
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Main Products: Secondary Devices For Substations, Power Plants, Transformers, Including Protection Relay, Power Meter, Online Monitoring And Measurement, Controlling Devices
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
10~110kv Voltage Levels Comprehensive Protection Measurement and Control Device Protection Relay Used for Line Protection

10~110kv Voltage Levels Comprehensive Protection Measurement and Control Device Protection Relay Used for Line Protection

US $ 1,000 / Set FOB
1 Set (MOQ)
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ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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Power System Simulator to Test Relays and Schemes with High Accuracy

Power System Simulator to Test Relays and Schemes with High Accuracy

US $ 13,000-18,000 / Piece FOB
1 Piece (MOQ)
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Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
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Hevgkeou 3-Phase Adjustable V/a Protector 230V 63A Voltage Current Monitor with Over/Under Protection Relay Industrial DIN Rail Motor Protection

Hevgkeou 3-Phase Adjustable V/a Protector 230V 63A Voltage Current Monitor with Over/Under Protection Relay Industrial DIN Rail Motor Protection

US $ 14-18 / Piece FOB
10 Pieces (MOQ)
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Power Meter Connection : Feed-through Type
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Audited Supplier
Wenzhou Hengkuo Electric Co., Ltd.

Trading Company

Zhejiang, China Since 2026
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Acrel Am5se-F Medium Voltage Line Protection Relay with Measuring Controling Function

Acrel Am5se-F Medium Voltage Line Protection Relay with Measuring Controling Function

US $ 777 / Piece FOB
1 Piece (MOQ)
More
Main Products: Energy Meter, Transformer Current, Temperature&Humidity Controller, Medical It System, Active Power Filter, Static Var Generator, Charging Pile
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Audited Supplier
ACREL CO., LTD.

Manufacturer/Factory & Trading Company

Shanghai, China Since 2019
Chat Now Send Inquiry
PR600 Power Line Protection Relay DC Voltage Monitoring Relay for Motor Start

PR600 Power Line Protection Relay DC Voltage Monitoring Relay for Motor Start

US $ 100-200 / Piece FOB
1 Piece (MOQ)
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Theory : Electromagnetic Relay
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Audited Supplier
Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
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Acrel Am5se-F Medium Voltage Line Protection Relay Used in 35kv System Network

Acrel Am5se-F Medium Voltage Line Protection Relay Used in 35kv System Network

US $ 777 / Piece FOB
1 Piece (MOQ)
More
Main Products: Energy Meter, Transformer Current, Temperature&Humidity Controller, Medical It System, Active Power Filter, Static Var Generator, Charging Pile
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Audited Supplier
ACREL CO., LTD.

Manufacturer/Factory & Trading Company

Shanghai, China Since 2019
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Strom Factory Supply Transformer Differential Protection Relay 110kv High Voltage Distance Protection Relay Transmission Line

Strom Factory Supply Transformer Differential Protection Relay 110kv High Voltage Distance Protection Relay Transmission Line

US $ 280 / Set FOB
1 Set (MOQ)
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
Economical 3-Phase Relay Protection Test System

Economical 3-Phase Relay Protection Test System

US $ 2,400 / Set FOB
1 Set (MOQ)
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Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
ZNP194 Protection Relay for motor line transformer capacitor bus coupler 20KV below

ZNP194 Protection Relay for motor line transformer capacitor bus coupler 20KV below

US $ 994-1,094 / Piece FOB
1 Piece (MOQ)
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Number of Pole : 3
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Audited Supplier
Gansu A&D Trading Co., Ltd.

Trading Company

Gansu, China Since 2024
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Ap750-L3 Line Fiber Differential Protection Relay for 10-110kv Mv Lines

Ap750-L3 Line Fiber Differential Protection Relay for 10-110kv Mv Lines

US $ 1,500-2,500 / Piece FOB
1 Piece (MOQ)
More
Main Products: Frequency Converter, Circuit Breaker, Contactor, Motor, Soft Starter, PLC, Spare Parts, Inverter Cabinet
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Shiny-Industry Technology Develop (Beijing) Co., Ltd.

Beijing, China Since 2024
Chat Now Send Inquiry
Strom St287fd Subminiature High-Voltage Numeric Line Differential Protection Relay High Power Contact Loadfor Mv&Hvproducts

Strom St287fd Subminiature High-Voltage Numeric Line Differential Protection Relay High Power Contact Loadfor Mv&Hvproducts

US $ 1,000 / Set FOB
1 Set (MOQ)
More
Type : Switch Cabinet
Send Inquiry
Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
Related Videos
  • What is Long Life Safety Controller Schneider Xpsac5121p Relay for Manufacturing Line Protection
    What is Long Life Safety Controller Schneider Xpsac5121p Relay for Manufacturing Line Protection
    US $ 835 /Piece
    1 Piece (MOQ)
    Send Inquiry
  • What is Ap750-L3 Fiber Optic Line Differential Protection Relay 32-Bit CPU 16-Bit Ad Sampling for 110kv Substation
    What is Ap750-L3 Fiber Optic Line Differential Protection Relay 32-Bit CPU 16-Bit Ad Sampling for 110kv Substation
    US $ 1,500-2,500 /Piece
    1 Piece (MOQ)
    Send Inquiry
  • What is Strom Factory Middle Voltage Electronic Over Current Protection Relay for Electric Transformer/Power Line Auto Switch Function
    What is Strom Factory Middle Voltage Electronic Over Current Protection Relay for Electric Transformer/Power Line Auto Switch Function
    US $ 480 /Set
    1 Set (MOQ)
    Send Inquiry
  • What is Mv &Hv Switchgear St287fd Integrated Numeric Line Differential Protection Relay Generator Forindustrial Power Distribution
    What is Mv &Hv Switchgear St287fd Integrated Numeric Line Differential Protection Relay Generator Forindustrial Power Distribution
    US $ 800 /Set
    1 Set (MOQ)
    Send Inquiry
Portable Relay Protection Maintenance & Calibration Instrument

Portable Relay Protection Maintenance & Calibration Instrument

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
Send Inquiry
Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Strom St26om Digitalvoltage Control Industrial Power Distribution Relay Protection CE Certified Incoming Line Protectorlec

Strom St26om Digitalvoltage Control Industrial Power Distribution Relay Protection CE Certified Incoming Line Protectorlec

US $ 230 / Set FOB
1 Set (MOQ)
More
Protection : Anti-static
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
Power System Relay Protection Commissioning Test Instrument

Power System Relay Protection Commissioning Test Instrument

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry

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About Line Protection Relay FAQ

  • QWhat affects the wholesale price of a test machine from a factory?

    Upgrade your Test Machine with the elegant and durable Line Protection Relay.Test machine price depends on measurement range, digital interface, and OEM customization. Trends show distributor volume discounts and factory prices change with technology updates. Check for special OEM or custom requests when getting a wholesale quote today.

  • QCan I request customized test machines at factory prices for my industry needs?

    Upgrade your Test Machine with the elegant and durable Line Protection Relay.Absolutely—many factories offer custom test machine options tailored to your sector’s requirements. Popular OEM features and recent industry trends explain price, delivery time, and distributor flexibility. Contact us to start customization and get competitive pricing.

  • QWho are the top distributors of test machines offering bulk or cheap deals?

    The Line Protection Relay is a premium choice in the Test Machine category.Leading distributors focus on factory-direct and bulk test machine deals, often ideal for industrial OEM use. Check for trends in wholesale packages and distributor guarantees on upgrades. Inquire now for a price guide or to request bulk order information.

Strom St280g Industrial Digital Protection Relay for Power Distribution Mv&Hv Interconnection Dynamic Line Rating Power

Strom St280g Industrial Digital Protection Relay for Power Distribution Mv&Hv Interconnection Dynamic Line Rating Power

US $ 500 / Set FOB
1 Set (MOQ)
More
Certification : ISO9001
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
Thermal Overload Relay, Phase Loss Protection, Motor Relay, AC Contactor, Self Resetting Thermal Relay

Thermal Overload Relay, Phase Loss Protection, Motor Relay, AC Contactor, Self Resetting Thermal Relay

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Main Products: Low Voltage Electrical Apparatus, Distribution Box, Voltage Regulator, Stabilizer, Terminal.
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Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
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Power Distribution Relay Protection Debugging & Calibration Tool

Power Distribution Relay Protection Debugging & Calibration Tool

US $ 2,400 / Set FOB
1 Set (MOQ)
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Application : Electrical & Electronics
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Good Quality Current Protection Thermal Overload Relay

Good Quality Current Protection Thermal Overload Relay

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Main Products: Low Voltage Electrical Apparatus, Distribution Box, Voltage Regulator, Stabilizer, Terminal.
Send Inquiry
Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
Chat Now Send Inquiry
Thermal Overload Relay Motor Protector

Thermal Overload Relay Motor Protector

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Speed : Variable Speed
Send Inquiry
Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
Chat Now Send Inquiry
Independent Aux DC Relay Protection Calibrator

Independent Aux DC Relay Protection Calibrator

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Fato Thermal Relay Thermal Overload Phase Loss Protector

Fato Thermal Relay Thermal Overload Phase Loss Protector

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Function : Control
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Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
Chat Now Send Inquiry
CFR2-D1301-CFR2-D4369 Thermal Overload Relay

CFR2-D1301-CFR2-D4369 Thermal Overload Relay

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Main Products: Low Voltage Electrical Apparatus, Distribution Box, Voltage Regulator, Stabilizer, Terminal.
Send Inquiry
Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
Chat Now Send Inquiry
Professional Portable Relay Protection Test System with Waveform Analysis

Professional Portable Relay Protection Test System with Waveform Analysis

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Application : Electrical & Electronics
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Industrial Relay Protection Calibration System

Industrial Relay Protection Calibration System

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Main Products: CT PT Analyzer, Relay Protection Test System, Substation DC System Tester, Battery Test System
Send Inquiry
Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Grid Relay Protection Fault Simulation & Detection Equipment

Grid Relay Protection Fault Simulation & Detection Equipment

US $ 2,400 / Set FOB
1 Set (MOQ)
More
Application : Electrical & Electronics
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Audited Supplier
Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
Chat Now Send Inquiry
Hot Selling Thermal Relay Overload Protector

Hot Selling Thermal Relay Overload Protector

US $ 1.6-2 / Piece FOB
100 Pieces (MOQ)
More
Main Products: Low Voltage Electrical Apparatus, Distribution Box, Voltage Regulator, Stabilizer, Terminal.
Send Inquiry
Audited Supplier
Huatong (FATO) Group Co., Ltd.

Group Corporation

Zhejiang, China Since 2025
Chat Now Send Inquiry
Overhead Line Protection Automatic Recloser with Vacuum Interrupter Circuit Breaker

Overhead Line Protection Automatic Recloser with Vacuum Interrupter Circuit Breaker

US $ 590-600 / Piece FOB
5 Pieces (MOQ)
More
Arc-extinguishing Medium : Vacuum
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Audited Supplier
Shanghai Zikai Electric Co., Ltd.

Manufacturer/Factory & Trading Company

Zhejiang, China Since 2025
Chat Now Send Inquiry
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