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Technology of Electrical Automatic

Welcome to Blue Jay Technology

China Manufacturer Energy Management and Electric Automation

ODM/OEM, One-stop solution for electric automation, offering energy metering, control and protection for the power industry.

Our Products

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Welcome to Blue Jay Technology

DC Insulation Monitoring Device

Monitoring insulation resistance in unearthed AC, AC/DC, and DC power supplies (IT systems), DC Charging stations, DC Panels, Electrical vehicles, etc.

Our Products

Get a Quote

Blue Jay Categories

Electrical metering, Automatic protection relay like insulation monitoring relay, etc.
Choose the solutions you need with innovative technologies & high standard products and ODM/OEM services.

Branch Circuit Metering

Ideal multi-circuit power metering solutions for commercial new and retrofit projects. One multi-channel meter can replace multiple ordinary meters. Any metering combinations of four-channel, six-channel, and eight-channel are possible allowing you to provide flexibility with installations of electrical metering systems.

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Multifunctional Panel Metering

Blue Jay's panel or din rail mounted multifunction meters are ideal for monitoring electrical feeders or busbars in 600V and below systems. These advanced meters provide comprehensive data on energy consumption, waveform capture, harmonics, and power quality, enabling users to optimize energy efficiency in buildings, automation, and power distribution networks.

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DC Metering Solution

Ideal DC metering solutions for EV charging stations, solar panels wind turbines, light rail transit, Data centers, energy storage and other renewable energy systems. With OEM & ODM service, our DC versatile and accurate metering solutions can meet a variety of DC project.

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AC DC Insulation Monitoring Device

Comprehensive insulation monitoring relays for electrical safety while charging or driving. Our AC or DC insulation monitoring devices are widely used to monitor the insulation in electrical vehicles, EV charging stations, railways, energy storage systems, medical systems, etc.

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ARC Flash Protection

An innovative solution for LV and MV arc flash protection. High-speed response to arc faults with arc flash and overcurrent detection. 3-channel, 4-channel, 48-channel arc flash sensor options.

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Motor Protection

Blue Jay motor protection solutions combine a full range of protection functions including overload, thermal, phase loss, overcurrent, earth fault, etc. Our multifunctional motor protection relay is the most competitive and cost-effective solution for LV asynchronous motors, synchronous motors, pumps, etc.

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WHO WE ARE

Focus on Electrical & Automation

Chongqing Blue Jay Technology Co., Ltd. (Blue Jay or Cqbluejay) is your professional energy metering & protection relay factory in China. With over 10 years of professional experience, Blue Jay specializes in the development, manufacturing, and sales of high-quality power energy meters and power automation protection relays. We also provide customized metering and power grid protection solutions for OEM/ODM customers.

Applications

From precise energy metering to robust electrical safety protection, Blue Jay has a range of solutions to meet your needs. We can also customize metering products or protection relays to fit your specific application requirements. More applications of Blue Jay electrical automation metering and protection include electrical switchgear, electrical motors and pumps, EV charging station, electrical vehicle, energy storage system, transformers, etc.

IMD for EV Charging Stations

Insulation monitor is widely used in DC Charging Stations, DC EV Charger. This article will introduce the Insulation Monitoring for DC Charging Stations from requirements, reason, features and so on.

IMD for DC Panel

Insulation monitoring device is widely used in DC Panel. This article will introduce the DC panel insulation monitoring from the definition, reason, working principle and so on.

Cable PD Monitoring

Insulation monitoring device is widely used in DC Panel. This article will introduce the DC panel insulation monitoring from the definition, reason, working principle and so on.

Switchgear PD Monitoring

PD monitoring and detection solution for Low, medium, and high-voltage switchgear.

PRE-FIRE ALARM SYSTEM

Introduce the composition principle of the electrical fire monitoring system, share the design concept and specifications in monitor application.

BATTERY SUPPERVISE SYSTEM

The BMS monitoring system monitor and signalise deep battery discharge in real time, eventually discharging of particular cells of battery sets.

HIGH-VOLTAGE SWITCHGEAR PROTECTION

Circuit breakers tend to gather dirt, moisture, and contaminants while in service.

BMS EQUIPPED RECTIFIER

Lead acid batteries are widely used in many industries and applications. The telecommunications industry uses a series stack of 4pcs lead-acid batteries to provide a 48V battery pack.

TEMPERATURE METERING & RECORD

Blue Jay developed MICO-RACE wireless temperature monitor, is a completely customized monitoring display and alarm system, standard works in 433MHz frequency (250-910MHz adjustable).

SMART ENERGY METERING

Smart energy metering need high quality equipment for monitoring power consumption especially in large-scale public buildings. Adopting advanced technology.

Why Choose Us

Blue Jay not only produces your product but also supports customized service to meet your OEM/ODM requirements and reduce the cost. We prioritize customer needs and continuously improve our product offerings. Until now, our meters and protection relays have offered a variety of advantages to many industries, businesses, and projects.

OEM/ODM Service: Tailor your project with logo, function, size, etc.
Two Production Factories: Well-equipped Facility& Fast production
Tech Engineering Support: 30+ Technique Experts
Full Certification: ISO9001, UL, CE, ROSH, etc

Popular Blue Jay Products

MCM263T 6 Branch Circuit Power Meter

up to 6 channel three phase circuits or 18 channel single phase circuits

MCM211D Single Phase Energy Meter

Simultaneously measuring three independent single-phase circuits.

194Q Multifunction Meter With RS485

Max 2 channel DO & 4 channel DI, Class 0.2S or 0.5S for basic power parameter

APM-4MJ Advanced Power Meter

Comply with CATIII-300V, withstand voltage 4KV, 1A or 5A, 333mV/100mA CT option

BIM-CH1 Insulation Monitoring Relay

Detecting insulation resistance of AC or DC system

AFR-4 Arc Flash Detection Relay

4 channels of arc light signals detection; Dual criteria for arc detection and overcurrent detection;

DH-63 Peltier Cooler Dehumidifier

60W 300ml/Day Dehumidifying capacity, Sheet metal with anti-rust spray dehumidifier

PR 260 Motor Protection Relay

Motor protection and contror for LV motors and Pumps.

Make your electrical-related property safety and efficient

What Clients Saying

We appreciate very much on the professional service, flexibility and promising quality product that come along all this while.

Wong Choon Leong

Blue Jay‘s team are honest to me. I had never got bad product, even there may have some defect one, but aftersales service is rapidly response, this is really good to my business, I am trust that I was getting is to be best products and service. I give you 10 out of 10 for best product and services.

Fah

As a small business, I need a cooperator that I can trust, the one must understands my business. Anne knows a lot and provides an excellent service. When I contact her any time, she can understand my query straightaway, in a short time give me suggestion of suitable products.

Dmitry Knyshuk

I have been a very satisfied and loyal customer of Chongqing Blue Jay company. They are very professional and quick in response. A very recommended electric goods supplier.

Veronica amianco

Extremely knowledgeable and helpful staff.

At first, it was your professional service that made me choose you. I am very satisfied with the cooperation in the past 7 years. Thank you for your support and cooperation in my business.

Dimitar Georgiev

I had experience to work with other China companies. When I give Blue Jay a ten, I would give those others a two.

Thank you for your excellent service to our organization. We are really impressed by the timely support that you have been providing us. This has been greatly helping us to complete our projects on time and ultimately achieving customer satisfaction.

Azizi Abdullah

Latest Blue Jay News

Profession determine quality, Concentration forge brand.

earth leakage vs residual current vs zero-sequence current

19Jun 2025

Earth leakage Vs Residual and Zero-sequence Current – What’s the Difference

By bluejay | Company News

SINGLE POLE VS DOUBLE POLE ENCLOSURE THERMOSTAT

12Jun 2025

What’s the difference between double pole and single pole thermostat

By bluejay | Company News

4Jun 2025

How to detect partial discharge in switchgear

By bluejay | Company News

Latest Blue Jay News

Profession determine quality, Concentration forge brand.

Earth leakage Vs Residual and Zero-sequence Current – What’s the Difference

Although earth leakage, residual current, and zero-sequence current are

June 19, 2025

What’s the difference between double pole and single pole thermostat

Single pole and double pole thermostats are essential temperature

June 12, 2025

How to detect partial discharge in switchgear

What is switchgear partial discharge? Partial discharge (PD) in

June 4, 2025

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.