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Power System Protection Relay

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RS485 Modbus Protection Relay Microprocessor for Substation Automation and Power System Monitoring Self Powered

RS485 Modbus Protection Relay Microprocessor for Substation Automation and Power System Monitoring Self Powered

US $ 280 / 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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Advanced Linear Model Feeder Relay Protection Power System

Advanced Linear Model Feeder Relay Protection Power System

US $ 1,500-2,000 / unit FOB
1 unit (MOQ)
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Function : Protection, Monitoring, Measurement
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Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
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10kv Substation Protection Relay Device in Power System for Distribution Networks

10kv Substation Protection Relay Device in Power System for Distribution Networks

US $ 310.8-311 / 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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Jiangsu Acrel Electrical Manufacturing Co., Ltd.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2020
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24V DIN Rail Overcurrent Earth Fault Protection AC DC Earth Leakage Relay for Single Phase 3 Phase Power System

24V DIN Rail Overcurrent Earth Fault Protection AC DC Earth Leakage Relay for Single Phase 3 Phase Power System

US $ 50-150 / Piece FOB
1 Piece (MOQ)
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Protective Characteristics : Enclosed Relay
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Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
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Low-Power Consumption Combination Structure Generator Protection Electrical Control System Relay

Low-Power Consumption Combination Structure Generator Protection Electrical Control System Relay

US $ 1,500-2,000 / unit FOB
1 unit (MOQ)
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Main Products: Power Meter, Electric Meter, Energy Meter, Panel Meter, Power Control System Scada, Single Phase Multifunction Meter, Smart Meter, Protection Relay, Voltage Relay, Control Relay
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Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
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Protective Guard System Arc Flash Protection Relay for Mv Power Distribution Power Generation

Protective Guard System Arc Flash Protection Relay for Mv Power Distribution Power Generation

US $ 1,500-3,000 / Piece FOB
1 Piece (MOQ)
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Phase : 3
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Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
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Overcurrent Protection Relays for Electrical Power System

Overcurrent Protection Relays for Electrical Power System

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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Jiangsu Acrel Electrical Manufacturing Co., Ltd.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2020
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Advanced Voltage and Current Protection Relay for Power Systems

Advanced Voltage and Current Protection Relay for Power Systems

US $ 3,000-3,500 / unit FOB
1 unit (MOQ)
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Condition : New
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Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
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Advanced Automatic Protection Relay Device for Power Systems

Advanced Automatic Protection Relay Device for Power Systems

US $ 3,000-3,500 / unit FOB
1 unit (MOQ)
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Main Products: Power Meter, Electric Meter, Energy Meter, Panel Meter, Power Control System Scada, Single Phase Multifunction Meter, Smart Meter, Protection Relay, Voltage Relay, Control Relay
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Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
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Power System Relay Protection Commissioning Test Instrument

Power System Relay Protection Commissioning Test Instrument

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

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
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Strom St28og-T Solid State Medium Voltage Protection Control Relay for Industrial Power Systems and Power Station Feeder

Strom St28og-T Solid State Medium Voltage Protection Control Relay for Industrial Power Systems and Power Station Feeder

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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3 Channel Arc Guard Flash Fault Detection Protection Relay for Mv Hv Switchgear Power Distribution Systems

3 Channel Arc Guard Flash Fault Detection Protection Relay for Mv Hv Switchgear Power Distribution Systems

US $ 800-3,000 / Piece FOB
1 Piece (MOQ)
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Electricity Type : Dc
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Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
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High-Performance Micomp243 Feeder Protection Relay for Power Systems

High-Performance Micomp243 Feeder Protection Relay for Power Systems

US $ 1,500-3,000 / unit FOB
1 unit (MOQ)
More
Main Products: Power Meter, Electric Meter, Energy Meter, Panel Meter, Power Control System Scada, Single Phase Multifunction Meter, Smart Meter, Protection Relay, Voltage Relay, Control Relay
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Audited Supplier
Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
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P5f30 Series Numerical Relay Integrated Multifunction Protection RS-485 Interface for Power Distribution Systems

P5f30 Series Numerical Relay Integrated Multifunction Protection RS-485 Interface for Power Distribution Systems

US $ 6,500-7,700 / unit FOB
1 unit (MOQ)
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Function : Automatic Control, Protection, Monitoring, Measurement
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Audited Supplier
Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
Chat Now Send Inquiry
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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Haomai Electric Power Automation Co., Ltd.

Manufacturer/Factory & Trading Company

Hubei, China Since 2017
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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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ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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24V DC Sis Controller Do Signals Internal Excontact Protection Safety Relay

24V DC Sis Controller Do Signals Internal Excontact Protection Safety Relay

US $ 95-102 / pieces FOB
1 pieces (MOQ)
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Main Products: Isolated Safety Barriers, Signal Conditioners, Surge Protective Devices, Safety Relays, Isolated I/O Modules
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Beijing Pinghe Chuangye Technology Development Co., Ltd.

Manufacturer/Factory & Trading Company

Beijing, China Since 2023
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Under Over Voltage Protection Relay for 3 Phase Systems

Under Over Voltage Protection Relay for 3 Phase Systems

US $ 7.32 / Piece FOB
5 Pieces (MOQ)
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Phase : 3
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Zhejiang Tongzheng Electric Co., Ltd.

Manufacturer/Factory & Trading Company

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
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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Strom High Power Subminiature Industrial Power Systems OEM Supplier Distance Relays for Power Stations Renewable Sealed Switch

Strom High Power Subminiature Industrial Power Systems OEM Supplier Distance Relays for Power Stations Renewable Sealed Switch

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

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
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Related Videos
  • What is RS485 Modbus Protection Relay Microprocessor for Substation Automation and Power System Monitoring Self Powered
    What is RS485 Modbus Protection Relay Microprocessor for Substation Automation and Power System Monitoring Self Powered
    US $ 280 /Set
    1 Set (MOQ)
    Send Inquiry
  • What is Advanced Linear Model Feeder Relay Protection Power System
    What is Advanced Linear Model Feeder Relay Protection Power System
    US $ 1,500-2,000 /unit
    1 unit (MOQ)
    Send Inquiry
  • What is 24V DIN Rail Overcurrent Earth Fault Protection AC DC Earth Leakage Relay for Single Phase 3 Phase Power System
    What is 24V DIN Rail Overcurrent Earth Fault Protection AC DC Earth Leakage Relay for Single Phase 3 Phase Power System
    US $ 50-150 /Piece
    1 Piece (MOQ)
    Send Inquiry
  • What is Low-Power Consumption Combination Structure Generator Protection Electrical Control System Relay
    What is Low-Power Consumption Combination Structure Generator Protection Electrical Control System Relay
    US $ 1,500-2,000 /unit
    1 unit (MOQ)
    Send Inquiry
K8ak-Ts1 Temperature Monitoring Relay for Motor Protection Systems

K8ak-Ts1 Temperature Monitoring Relay for Motor Protection Systems

US $ 75-85 / Piece FOB
1 Piece (MOQ)
More
Main Products: PLC Controller and Modules, Servo Drives and Motors, Soft Starter, Inverters, Power Supply, Sensor, Relay, HMI, Circuit Breaker, Industrial Control Accessories
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Wenzhou Jifeng Electrical Technology Co., Ltd.

Zhejiang, China Since 2026
Chat Now Send Inquiry
Universal Power Relay for Efficient Electrical Control Systems

Universal Power Relay for Efficient Electrical Control Systems

US $ 1,500-2,000 / Piece FOB
1 Piece (MOQ)
More
Customized : Non-Customized
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Audited Supplier
Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
Chat Now Send Inquiry
Pr203 Digital Motor Protection Relay, Three-Phase Motor Under Voltage Over Voltage Relay, Electronic Relay for 380V System

Pr203 Digital Motor Protection Relay, Three-Phase Motor Under Voltage Over Voltage Relay, Electronic Relay for 380V System

US $ 60-150 / Piece FOB
1 Piece (MOQ)
More
Main Products: Panel Meter, Energy Meter, Multifunction Power Meter, Protection Relay, Electrical Transducer, Thermostat, Smart Meter, Temperature Sensor, Energy Metering, Low Voltages
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Audited Supplier
Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
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About Power System Protection Relay FAQ

  • QWho are the top distributors of Impact Testing Machines offering bulk or cheap deals?

    The Power System Protection Relay is a standout piece in our Test Machine collection.Leading distributors focus on factory-direct and bulk Impact Testing 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.

  • QWhat affects the wholesale price of a Impact Testing Machine from a factory?

    Discover the perfect Test Machine addition with our Power System Protection Relay.Impact Testing 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 Impact Testing Machines at factory prices for my industry needs?

    The Power System Protection Relay is classified under our comprehensive Test Machine range.Absolutely—many factories offer custom Impact Testing 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.

Heavy Duty High Current Starter Relay for Auto Protection

Heavy Duty High Current Starter Relay for Auto Protection

US $ 0.1-0.3 / Piece FOB
500 Pieces (MOQ)
More
Phase : 1
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Audited Supplier
Ningbo Coolwell Import & Export Co., Ltd.

Trading Company

Zhejiang, China Since 2021
Chat Now Send Inquiry
Self-Monitoring Arc Flash Relay for Battery Energy Storage Systems

Self-Monitoring Arc Flash Relay for Battery Energy Storage Systems

US $ 800-2,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Panel Meter, Energy Meter, Multifunction Power Meter, Protection Relay, Electrical Transducer, Thermostat, Smart Meter, Temperature Sensor, Energy Metering, Low Voltages
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Audited Supplier
Chongqing Blue Jay Technology Co., Ltd

Chongqing, China Since 2024
Chat Now Send Inquiry
60A DIN Rail 230V Adjustable Over Under Voltage Protective Device Protector Relay

60A DIN Rail 230V Adjustable Over Under Voltage Protective Device Protector Relay

US $ 22.11 / Piece FOB
10 Pieces (MOQ)
More
Certification : ISO9001
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Audited Supplier
Zhejiang Tengtai Lightning Protection Technology Co., Ltd

Zhejiang, China Since 2011
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Three Phase Thermal Overload Relay Lrd33 Motor Protection Relay with Manual/Auto Reset for AC Contactor

Three Phase Thermal Overload Relay Lrd33 Motor Protection Relay with Manual/Auto Reset for AC Contactor

US $ 8.52-10.61 / Piece FOB
5 Pieces (MOQ)
More
Main Products: MCCB, Molded Case Circuit Breaker, Air Circuit Breaker, AC Contactor, Motor Protection Circuit Breaker, MCCB Accessories, Contactor Accessories, Acb Accessories
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Audited Supplier
Yueqing Shendian Electrical Co., Ltd.

Zhejiang, China Since 2012
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High Voltage Electrical Relay System for Circuit Protection

High Voltage Electrical Relay System for Circuit Protection

US $ 2.1-2.3 / Piece FOB
1,000 Pieces (MOQ)
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Type : Electric Parameter Relay
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Audited Supplier
Nanjing Zhengfeng Foreign Trade Services Co., Ltd.

Jiangsu, China Since 2022
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
Strom St137-A10kv System Auto Relay Test Set Motor Protection

Strom St137-A10kv System Auto Relay Test Set Motor Protection

US $ 128-133 / Piece FOB
50 Pieces (MOQ)
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Species : Terminal
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Audited Supplier
ZHUHAI STROM ELECTRIC CO., LTD.

Manufacturer/Factory & Trading Company

Guangdong, China Since 2026
Chat Now Send Inquiry
Versatile Acrel Am5se-F Protection Relay for Efficient 35kv Systems

Versatile Acrel Am5se-F Protection Relay for Efficient 35kv Systems

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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ACREL CO., LTD.

Manufacturer/Factory & Trading Company

Shanghai, China Since 2019
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Chq3-G Series Single Phase 230V DIN Rail Adjustable Protector Relay Dual LED Display 40A 63A Over and Under Voltage Protective Device

Chq3-G Series Single Phase 230V DIN Rail Adjustable Protector Relay Dual LED Display 40A 63A Over and Under Voltage Protective Device

US $ 22.11 / Piece FOB
10 Pieces (MOQ)
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Type : Power Source Arrester
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Audited Supplier
Zhejiang Tengtai Lightning Protection Technology Co., Ltd

Zhejiang, China Since 2011
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Reliable Operation Thermal Relay for Critical Motor Protection Systems

Reliable Operation Thermal Relay for Critical Motor Protection Systems

US $ 2-2.5 / Piece FOB
1 Piece (MOQ)
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Main Products: Air Circuit Breaker, Molded Case Circuit Breaker, Vacuum Circuit Breaker, Fireman Switch, Miniature Circuit Breakers
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Audited Supplier
Yueqing Quansheng Electric Co., Ltd.

Zhejiang, China Since 2020
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Advanced P5m30 Universal Power Relay for Electrical Control Systems

Advanced P5m30 Universal Power Relay for Electrical Control Systems

US $ 1,500-2,000 / unit FOB
1 unit (MOQ)
More
Task : Program
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Audited Supplier
Beijing Hezhong Huineng Electric Technology Co., Ltd

Manufacturer/Factory & Trading Company

Beijing, China Since 2025
Chat Now Send Inquiry
Auto Three Phase AC Voltage Monitoring Relays Over Under Voltage Protection Relay with CE

Auto Three Phase AC Voltage Monitoring Relays Over Under Voltage Protection Relay with CE

US $ 8.73-10.62 / Piece FOB
100 Pieces (MOQ)
More
Main Products: Electronic Relay, Motor Protector, Voltage Relay, Current Relay, Time Relay
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Audited Supplier
Yueqing Aukeman Trading Co., Ltd.

Zhejiang, China Since 2010
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Test-330 Three Phase Relay Protection Microcomputer Test System

Test-330 Three Phase Relay Protection Microcomputer Test System

US $ 3,000-6,500 / Piece FOB
1 Piece (MOQ)
More
Action Principle : Electromagnetic Type
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Audited Supplier
Beijing GFUVE Electronics Co., Ltd.

Beijing, China Since 2013
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