Automatic Protection Relay

High-performance fault protection for LV, MV, and HV power networks. Enhance your electrical safety with our predictive protection relays. Offer one-stop distribution protection solutions for OEM/ODM customers.

What Are Blue Jay Automatic Protection Relays

Blue Jay Automatic Protection Relays are engineered to monitor and safeguard electrical equipment in the automated industry from faults and abnormalities. These protection relays automatically detect and respond to conditions like overcurrent, overvoltage, and ground faults, preventing damage and ensuring safe electrical system operation. As a Chinese protection relay manufacturer with over a decade of expertise, Blue Jay offers a range of protection solutions, including arc flash, motor, switchgear monitoring/temperature control relays, etc.

Our cutting-edge LV/MV/HV Automatic Protection Relays give you high precision, safety, and reliability for your valuable assets and electrical systems. Partner with us and see why B2B customers across Europe and America are already satisfied.

Arc Protection Relay

AFR-4 Arc Flash Detection Relay with 4 Channels

AFR-4 arc flash detection relay is a versatile and independently operating device for bay based protection. It supports 4-channels arc...

AFR-3S Arc Flash Relay with 3 Channels

AFR-3S Arc flash relays are mainly used to detect arc faults in electrical systems and protect equipment and personnel in...

AFR-M 48 channel Arc Flash Relay for busbar protection

AFR-M Busbar ARC Flash Protection Relay

The AFR-M Busbar Arc Flash Protection Relay is a cost-effective solution designed to safeguard your low-voltage (LV) or medium-voltage (MV)...

Motor Protection Relay

CT305 Motor protection external CT

CT306 Motor protection external CT

CTZ6-065 zero sequence current transformer for motor protection relay

ZCT-Z6-065 Zero Sequence Current Transformer

ZCT-Z6-065 zero sequence current transformer (zero sequence CT) is a device used to measure zero-sequence current in a power system....

CT304 Motor Protection Current Transformer

Highly sensitive and accurate motor protection current transformer Maximum Input Current: upto 135A, 165A, 200A

PR 240 Intelligent Motor Management Relay

PR 240 intelligent motor management relay is suitable for protecting, monitoring, metering, and controlling motors in industrial areas such as...

PR 260 Electric Motor Protection Relay

The PR 260 electric motor protection relay, known as the motor management relay, is designed for motor protection and control,...

Distribution Line Protection

ELR-4MA AC Earth Leakage Relay

The ELR-4MA AC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical...

ELR-4MD DC Earth Leakage Relay

The ELR-4MD DC Earth Leakage Relay is an advanced protection device designed to enhance the safety and reliability of electrical...

MPR-6M Multifunction Protection Relay

The MPR-6M Multifunction Protection Relay is suitable for circuit protection and monitoring of electrical lines and distribution cabinets. It can...

PR-80L Power Line Protection Relay

PR-80L power line protection relay is suitable for protection and monitoring of low-voltage lines with rated voltage below 690V and...

RCM Residual Current Monitor for grounded systems

RCM AC Residual Current Monitor

The RCM AC Residual Current Monitor is a comprehensive device designed to monitor and measure fault currents or residual currents...

SCM-W3000 Switchgear Thermal Monitoring

W3000 Switchgear Thermal Monitoring is a distributed temperature sensing (DTS) system, also called a wireless temperature monitor. It provides temperature...

Electrical Cabinet Dehumidifier

DH5-80 Aluminum Alloy Cabinet Dehumidifier

The DH5-80 aluminum alloy cabinet dehumidifier reduces the relative humidity and absolute humidity by reducing the water content in the...

DH141 industrial cainet Dehumidifier with fan

DH6-200 Sheet Metal Dehumidifier for Cabinet

The DH6-200 Sheet Metal Dehumidifier for Cabinet reduces the water content in the air, and the relative humidity and absolute...

DH1-20 Intelligent Enclosure Dehumidifier

The DH1-20 Intelligent Enclosure Dehumidifier (semiconductor dehumidifier) is a device used to control and maintain the environmental humidity inside the...

DH2-60 ABS Intelligent Dehumidification Device

DH2-60 ABS intelligent Dehumidification Device adopts semiconductor refrigeration technology to develop an ultra-small, high-efficiency, and energy-saving dehumidifier dehumidification and anti-condensation...

Blue Jay DH-062 Electrical Enclosure Dehumidifier

DH3-60 Electrical Enclosure Dehumidifier

The DH3-60 Electrical Enclosure Dehumidifier utilizes semiconductor refrigeration technology to create an ultra-compact, highly efficient, and energy-saving solution for dehumidification...

DH4-60 Peltier Cooler Dehumidifier

Background of using DH4-60 Peltier Cooler Dehumidifier: A high humidity environment is a big impact factor on power transmission and...

Enclosure Temperature And Humidity Controller

TWSK Series Transformer Temperature Controller with sensors

TWSK Transformer Temperature Controller

The TWSK Series transformer temperature controller is specifically designed for container transformer stations such as Dry-Type Transformers and Cast Resin...

WSK-72 Series switchgear temperature monitoring

WSK-72 Series Digital Thermostat and Humidity Controller

The WSK Series Digital Thermostat and Humidity Controller is a versatile device that combines temperature and humidity control with programmable...

WSK Series Digital Temperature And Humidity Controller

WSK series digital temperature and humidity controller is a measuring device for temperature and humidity control. This digital temperature humidity...

Partial Discharge Monitoring

HFCT PD Sensor for Power Cables

The HFCT partial discharge sensor is designed for high-voltage cables. Based on High-Frequency Current Transformer (HFCT) technology and Rogowski coil...

SCM-PDS3 AA TEV UHF Wired Three-in-one Partial Discharge Sensor

SCM-PDS3 partial discharge sensor integrates three detection technologies: ultrasonic (AA), transient earth voltage (TEV), and ultra-high frequency (UHF), providing a...

SCM-PDS3W AA TEV UHF Wireless PD Sensor

The SCM-PDS3W PD sensor integrates ultrasonic, TEV (Transient Earth Voltage), and UHF (Ultra High Frequency) technologies to detect partial discharges...

Blue Jay Partial Discharge Monitor with PD sensors

SCM-PD3000 Partial Discharge Monitor

PD3000 Partial Discharge Monitor is an advanced solution for various and continuous partial discharge monitoring in medium-voltage and high-voltage electrical...

Recloser Controls

BJ-FTU100 Feeder Terminal Unit

The BJ-FTU100 Feeder Terminal Unit is a fully digitalized, microprocessor-based control protection relay designed to provide protective coordination and fault...

BJ-FTU200 Recloser Controller

BJ-FTU200 Recloser Controller is critical for achieving feeder automation in modern power distribution networks. Their primary role is to execute...

Capacitive Voltage Indicator

HVD-QS High Voltage Indicator

The HVD Series High Voltage Indicator is designed for application in 7.2- 40.53 kV medium-voltage systems with rated frequencies of...

Insulation Monitor

BIM-CH1 Insulation Monitoring Device

The BIM-CH1 insulation monitoring device monitors the insulation resistance of DC systems (IT systems) devices up to DC 0- 1000V....

BIM-M1000 Insulation Monitoring Device for AC/DC system

BIM-M1000 is designed to monitor the insulation resistance of unearthed AC, AC/DC and DC systems (IT systems) up to AC/DC...

JY1000-AL Isolation Monitoring Device

The JY1000-AL Isolation Monitoring Device is based on the non-balanced bridge principle, integrating monitoring and protection functions. It can monitor...

JY1000-ST Insulation Monitoring Relay

The JY1000-ST Insulation Monitoring Relay has basic functions such as insulation resistance monitoring, DC voltage monitoring, and DC voltage reverse...

JY2000-AL insulation monitoring device with alarm relay

JY2000-AL IMD Insulation Monitoring Device

JY2000-AL IMD Insulation Monitoring Device can monitor the insulation resistance value of the positive and negative poles of the DC...

JY1000-EV Insulation Monitoring Device for Electric Vehicle

JY1000-EV is designed for insulation monitoring of the entire electric drive system of electric and hybrid vehicles. Whether it is...

JY1000-C2 IMD Insulation Monitoring Device with two channels

JY Series DC Insulation Monitor

The JY series DC insulation monitor has the function of insulation monitoring start and stop, insulation monitoring can be real-time...

ZJJ Series DC Ground Fault Detector

The ZJJ series DC ground fault detector can monitor the insulation condition of the DC bus and the grounding resistance...

Fault Annunciator

ALM-CH6 6 window annunciator

The ALM-CH6 6-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

ALM-CH10 10 window annunciator

The ALM-CH10 10-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

ALM-CH12 12 window annunciator

The ALM-CH12 12-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

ALM-CH16 16 Channel Fault Annunciator

The ALM-CH16 16-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

ALM-CH8 8 window annunciator

The ALM-CH8 8-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

ALM-CH4 4 window annunciator

The ALM-CH4 4-channel fault annunciator is installed on the electrical cabinet panel. It is simple, and compact, and enhances wiring...

Switchgear Monitoring for Condition

CBM3000 Circuit Breaker Manager

CBM3000 circuit breaker manager (CBM) is an integrated control relay, designed for 3KV to 35KV indoor switchgear, used to replace...

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Chongqing Blue Jay Technology Co., Ltd. was founded by engineers with many years of experience. Focuses on the development, production and sales of power automation monitoring products and energy metering instruments.