Blue Jay offers a complete portfolio of low voltage protection relay designed for monitoring and protection in industrial and power systems. The low voltage monitoring relay continuously monitor critical electrical parameters—including voltage, current, frequency, phase sequence, insulation resistance, and temperature—and upon detecting anomalies or faults, issue alarms or automatically disconnect circuits, preventing equipment damage and electrical incidents.
Blue Jay primarily offers four categories of low voltage protection relays: low voltage circuit protection relays, DC insulation monitoring relays, Relays for cabinet climate control, and battery condition monitoring devices.
Blue Jay PR240 Split multifunction motor protection relay
The PR Series motor protection relay is designed specifically for motor protection, accurately monitoring key parameters such as current and temperature during motor operation.
When a motor fault condition such as overload, stall, phase loss, three-phase imbalance, or overtemperature occurs, the protector quickly identifies and triggers protective action, promptly shutting off the circuit or issuing an alarm signal to prevent the motor from continuing to operate due to the fault condition and causing serious damage.
Single-Function Protection Relay
Blue Jay single-function low voltage protection relays address the risk of failure caused by a single parameter abnormality in low-voltage lines, providing specialized single-function protection solutions. These solutions primarily cover overvoltage and undervoltage protection. These products are widely used in power distribution lines, power supply lines for household appliances, and power supply lines for small industrial equipment.
MPR Series Multi-Function Comprehensive Line Protection Relay
The Blue Jay MPR-6M comprehensive line protection relay integrates multiple functions, simultaneously monitoring key electrical parameters such as voltage, current, frequency, phase sequence, overload, and short circuit, enabling comprehensive line diagnosis and protection. In addition, the MPR-6M multifunction protection relay features a data logging function that stores key parameters at the time of a fault, providing valuable insights for troubleshooting and system optimization. It’s suitable for complex scenarios requiring high line protection, such as distribution panels, switchgear, and industrial automation production lines.
SCM series Wireless Temperature Protection Relay
Blue Jay’s SCM series wireless temperature protection relays utilize advanced wireless temperature measurement technology. Wireless temperature sensors installed at key temperature measurement points collect real-time temperature data and wirelessly transmit the data to the relay host.
The host analyzes the temperature data in real time and immediately issues an alarm if the temperature exceeds the set threshold. This effectively prevents equipment failures caused by localized overheating and ensures the safe operation of switchgear and other equipment. These wireless temperature monitoring relays are widely used for temperature monitoring and protection of high and low voltage switchgear, transformers, reactors, and other equipment.
BIM Series: Insulation monitoring devices suitable for both AC and DC power systems, ideal for IT systems. These devices monitor the system’s insulation resistance to ground in real time.
When the insulation resistance drops below the set alarm threshold, they immediately issue an alarm signal. They also output an alarm signal through relay contacts, enabling other devices to take appropriate action.
JY Series: Provides insulation monitoring for electric vehicle & charging scenarios. These products feature strong anti-interference capabilities, fast response speed, and adaptability to harsh environments.
They operate stably under complex operating conditions such as high and low temperatures, vibration, and electromagnetic interference, effectively ensuring the insulation safety of new energy and energy storage systems and preventing accidents caused by insulation failures.
ZJS-102: DC System Insulation Monitoring Device is a professional insulation monitoring device designed specifically for DC systems. It is widely used in DC substation systems, power supply systems, and DC motor drive systems. The device uses differential detection technology to accurately monitor the insulation resistance of the positive and negative poles of the DC system to the ground.
When the insulation resistance of either pole decreases, an alarm signal can be issued in time.
The Blue Jay series of enclosure environmental monitoring and protection devices precisely regulates the internal environment of the enclosure, creating a suitable operating environment for the electrical equipment within the enclosure and ensuring long-term stable operation.
Enclosure Dehumidifier (DH Series): Utilizing advanced semiconductor refrigeration technology, the DH Series dehumidifiers automatically monitor the humidity within the enclosure.
When the humidity exceeds the set range, they automatically activate the dehumidification function, quickly reducing the humidity to a safe level.
Enclosure Thermostat (WSK Series): These digital cabinet thermostats offer high-precision temperature monitoring and control capabilities, allowing you to set an optimal temperature control range based on the operating temperature requirements of the enclosure’s equipment. When the enclosure temperature exceeds the set upper limit, the thermostat activates cooling devices (such as fans) to lower the enclosure temperature.
When the temperature falls below the set lower limit, the thermostat activates heating devices to raise the enclosure temperature, ensuring the enclosure temperature remains within a suitable operating range.
Dust-Proof Ventilation System: Blue Jay dust-proof ventilation systems combine the functions of fans and heaters to provide enclosure ventilation and heat dissipation while effectively preventing the ingress of dust.
The device has excellent dustproof sealing performance, which can effectively filter dust particles in the air and ensure the cleanliness and safety of electrical equipment in the cabinet. It is suitable for industrial environments with high dust content, such as equipment cabinets in metallurgy, mining, chemical and other industries.
Battery Condition Monitoring Device (ZJB Series)
The Blue Jay ZJB series battery condition monitoring device is designed for battery packs with common voltage levels, such as 110V and 220V. It monitors key battery parameters such as voltage, current, temperature, and capacity in real time, providing a comprehensive understanding of the battery’s health and operating status.
This device uses online monitoring to collect and analyze various battery parameters in real time without interrupting battery operation. It generates immediate alarm signals when abnormal battery voltage, capacity degradation, or excessive temperature occur.
This product is widely used in applications such as DC operating power supply batteries in substations, UPS power supply batteries, and communication base station batteries.
Motor and Pump Control
In motor and pump control scenarios, products like motor protectors in the Blue Jay low-voltage line protection relay series play a vital role. These products effectively protect motors from faults such as overload, phase loss, stall, and overtemperature, ensuring stable operation of motors and pumps.
Distribution Panels and Switchgear
The Blue Jay low voltage protection relay includes integrated line protection relays, wireless temperature protection relays, and in-cabinet environmental monitoring and protection devices, providing comprehensive protection for distribution panels and switchgear.
Integrated line protection relays ensure stable line electrical parameters, wireless temperature protection relays monitor the temperature of key cabinet components, and in-cabinet environmental monitoring and protection devices regulate internal cabinet temperature, humidity, and dust protection, providing comprehensive protection for the safe operation of distribution panels and switchgear.
Generator Sets
As emergency power supplies or self-contained power supplies, generator sets play a critical role during power outages or special circumstances. Blue Jay low-voltage line protection relays monitor generator output parameters such as voltage, current, and frequency to ensure stable and reliable output. When a generator experiences abnormal output voltage or frequency fluctuations, the protective relay can promptly issue an alarm or initiate appropriate protective measures, preventing damage to the generator due to faulty operation while also ensuring the safety of electrical equipment.
Industrial Automation and Mechanical Equipment
In industrial automation production lines and various types of mechanical equipment, numerous electrical devices operate in concert, placing extremely high demands on power system stability and specialized equipment protection. Blue Jay’s diverse range of low-voltage protective relays offers customized protection solutions tailored to the specific protection needs of each device. For example, motor protectors can be used for motors in automated production lines, integrated line protection relays can be used for power distribution systems, and environmental monitoring and protection devices can be used for equipment cabinets, comprehensively ensuring the safe and stable operation of industrial automation and mechanical equipment.
In summary, the Blue Jay low voltage protection relay, through the synergistic integration of four core product lines, provides comprehensive protection for low-voltage power systems and equipment, encompassing electrical parameter monitoring, insulation safety assurance, environmental optimization and control, and battery status management.
The MPR-6M Multifunction Protection Relay is suitable for circuit protection and monitoring of electrical lines and distribution cabinets. It can monitor various parameters in real time, such as current, voltage,
Transformer protection relays are essential devices that safeguard power
