Questions

General Frequently Asked Questions about Blue Jay

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Who is Blue Jay?

Blue Jay is an industrial electrical automation manufacturer of energy meters and protection relays, established in 2013. Our team comprises over 150 members, including more than 20 professional technical engineers, so we can respond to our customers and offer high-quality products to you.

How can I do products selection?

Blue Jay provide online catalog download, you can check the mainly sale products models in the catalog. Also can view products gallery details page to choose right one. If some products no selection information, you can leave message on site or send mail to our Sales Team. Another way is that use WhatsApp or Skype or phone call to chat with sales team directly.

Is your company a manufacturer or a trading company?

Yes, we are the manufacturer of energy meters and protection relays.

Can I get tech support before order?

Our sales team are well trained, can help you to do product recommendation and selection, just need you provide description of the products, or any kinds of datasheet related similar products, or a photo of needed products. Sales can suggest you the alternative products and help you do sourcing works. Also you can send mail to Technical support team for generally tech problem inquire.

Can I purchase online?

We only offer few products for online payment, most are sample order and small amount, you can place order on our Alibaba shop, there provide Alibaba trade assurance plan. In order to save bank fees, we also recommend you transfer money from your company's partner in China to pay directly in RMB. Regular purchase order please contact our sales team to place formal PO, we accept T/T, L/C payment way.

When Blue Jay can ship out products after I payment?

Our standards products are stored as semi-finished component, after your order will start internal process, and all the products will pass the 48hours burn-in test. In the off-season lead time is around 3-7 working days, high season lead time around 10-15 working days. Sample orders and customized orders will be adjusted according to the production line actual situation. Third-party purchase orders we cannot control the delivery date, please contact the responsible salesman to confirmation. More info about this parts, please click here.

Can you provide OEM service?

Yes, Blue Jay offers three levels of OEM ODM services:
Brand Change (OEM): Change the brand on existing models. This requires new designs for labels, packaging, and logos with customer information. There is no extra cost and no minimum order quantity (MOQ).

Brand and ID Change: Change both the brand and the industrial design on existing models. In addition to the brand change, Blue Jay will provide function adjustment and a new industrial design for customer confirmation and create new tooling. Customers only need to cover the tooling costs along with the MOQ.

From Concept to New Product (ODM): This service allows customers to develop a completely new product from concept to market-ready. Blue Jay has a professional team that handles technical development, testing, manufacturing processes, quality control, supply chain management, and project management.

How I place customized products order?

Before you plan to start customized products from our company. please make sure the target function and intention product style, we accept sketch drawing, CAD, any types of 3D view drawing. After this you can chat with our sales team for initial discuss, if necessary our tech team will join the discuss. In this period, we prefer Skype or WhatsApp or Video meeting etc. for efficient communication. After you agree with the developing cost (depends on the complexity of customized products), Blue Jay will provide document include detailed functional requirements and run with a contract. Then only you pay the developing fee that we can start your customized products plan. More info about this parts, please click here.

Can I become Blue Jay agent in my country?

We are welcome client can become our agents or distribute our own products. You need to fill in a simple questionnaire, then send mail to our sales team. after that our sales manager will contact you directly for future negotiation.

What is the warranty of your products?

All of our products have a 1- 3 years warranty.

How about the quality of your products?

Blue Jay provide high quality products with IEC certification.

How about your payment terms and shipment?

We accept T/T, L/C, and Western Union, prefer to TT, delivery date should be within one or two weeks after payment.

What's your advantage? Why should I choose Blue Jay?

Price: Compared to other famous companies, our costs are significantly lower.
Quality: We maintain strict quality control, and each product undergoes lifetime testing & inspection.
Sales support: We can take quick action on any requirements.

What is lead time?/How long is your delivery time?

Generally it is 3-5 days if the goods are in stock. Or it is 10-15 days if the goods are not in stock, it is according to quantity.

Do you provide samples? Is it free or extra?

Yes, we can provide the sample at a low price. If you place the order, all or part of the sample charge will be deducted from the goods. Sometimes, we can send you a free sample.

How long can you send your quotation to us?

After we get all the detailed information, we will quote within 1 working day.

What is the production capacity of your company?

The company's production capacity is 700000 sets per month.

What application fields are your products mainly involved in?

EV charging stations, Railyways, BESS, Solar Panels, Factories, schools, urban construction, hotels, rental houses, commerce, etc.

FAQ for Energy Meter & Power Meter

Are any CTs compatible with the Blue Jay energy meter?

If you purchased your CTs through us, you can be assured they will work with our energy meters. While we support a broad range of CTs that may be available from other sources, not all CTs are compatible with every meter. For a complete list of supported CT models and their current ratings, please refer to the Blue Jay CT Compatibility List.

Does the Blue Jay energy meter require Calibration?

All Blue Jay meters are calibrated during production, ensuring they meet a consistent standard of accuracy. Once calibrated, these meters do not require any further inspections, maintenance, or recalibration. It is recommended to calibrate every 1-2 years to ensure measurement accuracy, especially for billing purposes.

What kinds of energy meter do you have?

We mainly provide multi-circuit energy meter, multifunction meter, DC energy meter, and din rail energy meters, etc.

How much data can the Blue Jay meter store? What is the sampling rate per cycle of the meter?

The Blue Jay advanced energy meter, equipped with a high-speed sampling chip supporting up to 12,800 samples per second, can capture detailed waveform data. At a 50 Hz system frequency, it collects 50 cycles per second × 144 samples per cycle = 7,200 samples per second, providing high-resolution monitoring of harmonics up to the 127th order. The actual data storage depends on the internal memory configuration, which allows recording of multiple days of power quality data, waveform captures, and energy parameters for analysis.

Where do I view the energy KWh consumption on the meter?

Blue Jay meters allow you to view energy consumption directly on the local LCD screen for real-time monitoring. Additionally, energy data can be remotely read via the RS485 interface using Modbus or other compatible communication protocols, enabling integration with SCADA or energy management systems.

How do I get the monthly KWh consumption on the meter?

Blue Jay meters record cumulative energy data internally. Monthly kWh consumption can be obtained by reading the meter via the local LCD display if it provides period-based summaries, or more commonly, remotely through the RS485 interface using Modbus or other compatible software to retrieve historical or period energy data for analysis.

Does the meter support single phase application?

Yes. Blue Jay energy meters support both single-phase and three-phase applications, making them suitable for residential, commercial, and light industrial installations.

Does the meter require external power supply?

Yes, the meter does require a power supply. Most models support a wide auxiliary power range of 85–265 V AC/DC, while some variants accept 20–60 V DC.

What is the life expectancy of the meter?

Blue Jay energy meters typically last 10–20 years, depending on operating conditions and maintenance.

What is the frequency range of the meter?

Blue Jay energy meters support a frequency range of 45–65 Hz, making them suitable for most standard low- and medium-voltage power systems.

What type of serial port does the meter use?

Blue Jay energy meters are equipped with RS485 and/or Ethernet communication ports, depending on the model. RS485 supports standard Modbus RTU communication for reliable data exchange with controllers or SCADA systems, while Ethernet allows Modbus TCP/IP or web-based monitoring for networked applications.

What is the voltage and current input range of DC energy meter?

It supports voltage measurement from 0 to 1000VDC and current measurement from -650A to +650A.

What is the difference between an analog panel meter and a digital panel meter?

Analog panel meters use moving pointers on a scale, while digital panel meters display numeric values directly, offering higher accuracy and additional functionalities.

FAQ for Arc Flash Relay

Does the arc flash relay detect a possible event or the event itself and operate the feeder breaker?

The arc flash relay detects the actual arc event—through light or a combination of light and current dual criteria—and immediately sends a trip signal to the corresponding feeder circuit breaker to isolate the fault.

Are these arc flash relays UL-listed?

Blue Jay arc relays are IEC-listed.

Can the Blue Jay Arc-Flash Relays eliminate the need for PPE 3 or 4 clothing?

No, Blue Jay Arc-Flash Relays do not eliminate the need for personal protective equipment (PPE). However, by rapidly detecting arc flash events and reducing exposure risk, they can allow certain tasks to be performed with lower-level PPE (e.g., PPE 2 instead of PPE 3 or 4) under controlled conditions, improving worker comfort and reducing equipment costs while maintaining safety.

Do arc flash relays lower the required level of personal protective equipment (PPE)?

Although Blue Jay’s arc‑flash relays significantly enhance electrical safety by rapidly detecting and clearing arc flash events, thereby reducing exposure time and severity, they cannot replace proper personal protective equipment (PPE). Operators must still wear appropriate PPE, as the relays mitigate but do not entirely eliminate the risks associated with arc flashes in switchgear and industrial electrical systems.

What are the key considerations when choosing an arc flash relay?

When selecting an arc flash relay, focus on technical parameters such as detection speed and response time, trip reliability under varying fault conditions, sensitivity and dynamic range of optical and current sensors, configurable logic settings to prevent false trips, communication interfaces for integration with protection systems, and scalability to handle multiple channels or feeders for comprehensive arc flash protection.

Do the Blue Jay Arc Flash Relays provide fault location identification?

Yes, Blue Jay Arc Flash Relays provide fault location identification. Each relay features LED indicators corresponding to individual sensors, giving immediate visual feedback to show which sensor detected the arc flash and triggered the trip. This enables rapid fault pinpointing, simplifies maintenance, and reduces system downtime by clearly identifying the affected feeder or switchgear section.

Do the Blue Jay Arc-Flash Relays provide zone tripping?

The AFR-4 has four outputs for circuit breaker tripping. Each sensor input can be assigned to any one or all four trip outputs. Therefore, the AFR-4 can trip up to four independent zones.

Do the different models of the arc flash relay have different response times?

All Blue Jay Arc-Flash Relay models feature an ultra-fast response, capable of issuing a trip signal within 5 ms upon detecting light and current. However, users can configure an additional time delay if required by the protection coordination or system design.

What is the life of the Blue Jay Arc-Flash Relays?

Blue Jay Arc‑Flash Relays are backed by a 5–10 year warranty, and their durable design and high-quality components allow them to operate reliably for many years beyond the warranty period, even in challenging industrial environments.

What are the typical application/system voltages of arc flash relays?

The Blue Jay arc flash relay is mainly used on electrical systems operating at MV and HV voltage.These electrical systems are monitored with arc flash sensors and optional current transformers that can be selected for any current/voltage rating. The small size of these Arc-Flash Relays allows for installation in any switchgear cubicle, transformer compartment, or motor control center bucket.

What is the maximum recommended length from the Blue Jay Arc-Flash Relays to the breaker?

The distance between the arc-flash relay and the breaker should be kept within 30 meters, as both are typically installed within the same switchgear or cabinet to ensure reliable signal transmission and fast tripping response.

Can the Blue Jay Arc Flash Relay protect an entire switchgear busbar section from arc flash?

Yes. The Blue Jay AFR-M Arc Flash Relay is designed to protect entire switchgear busbar sections by using light and current dual detection. With multiple sensor inputs and ultra-fast tripping within 5 ms, it provides reliable and comprehensive arc-flash protection across the whole busbar area.

Can arc flash protection be used in 10KV or 0.4KV systems?

Arc flash protection is suitable for power supply systems of 35KV and below, meaning it can be used in 35KV, 20KV, 10KV, 6KV, and 0.4KV power supply systems.

What are the configuration principles for arc flash protection?

Configured according to busbar sections, each busbar section should be equipped with one arc flash protection unit, and each busbar compartment (or cable compartment, etc., can be installed as needed) of each cabinet should have one arc flash sensor installed.

FAQ for Insulation Monitoring Device

Can Blue Jay insulation monitoring device (IMD) detect ground faults?

Yes, GY1000-EV and BIM-M1000 can detect ground faults. The GY1000-EV and BIM-M1000 are active insulation monitoring devices (IMDs) that connect between a phase and ground conductor. The IMD continuously transmits a small, safe test signal to the phase conductor. If a ground fault occurs, the signal is transmitted to the ground and then returned to the IMD. The IMD then triggers an alarm indicator and outputs a signal to the main control unit.

What is the insulation resistance range that Blue Jay IMD can measure?

The Blue Jay Insulation Monitoring Device (IMD) can measure insulation resistance in the range of 0 to 50 MΩ, allowing for effective monitoring of both low- and high-resistance insulation conditions in DC systems.

Can we use an earth leakage relay instead of an insulation monitoring device? Do they provide the same protection?

No. An earth leakage relay is used in grounded neutral systems. It detects leakage current exceeding a preset current value (usually 5A) and issues a trip signal. An insulation monitoring device, on the other hand, is used in ungrounded neutral systems to monitor the system's insulation resistance, measured in ohms (Ω). An IMD issues an alarm when the insulation resistance falls below a set value. While tripping is generally not necessary, it does serve as a reminder that the primary fault must be addressed as soon as possible to prevent a dangerous secondary fault. The two devices are designed for completely different system types and have completely different protection mechanisms.

Is it mandatory to install insulation monitoring devices in DC fast charging stations?

Yes. In DC fast charging stations, installing insulation monitoring devices (IMDs) is typically mandatory or strongly recommended by safety standards and industry regulations to ensure personnel safety and equipment protection. IMDs help detect insulation faults early, preventing potential electric shock hazards and system failures.

In the same IT system, how can we effectively coordinate multiple IMDs, resolve mutual interference issues, and ensure uninterrupted system insulation monitoring?

Using a master/slave setup or multi-channel IMDs, such as Bluejay’s dual-channel devices, allows monitoring of multiple circuits while minimizing interference and ensuring uninterrupted insulation monitoring.

FAQ for Partial Discharge Monitoring

Why is Blue Jay PD monitoring recommended for medium and high voltage assets?

Medium and high voltage assets, such as MV&HV switchgear, power transformers, cable systems, and generators, are of high importance for every grid. With high electric fields in comparatively small spaces, failure can lead to extensive damage and long outages. Blue Jay PD monitoring can help to keep these units in service for longer by early identification of insulation defects and efficient planning of maintenance or repair work. Thus, PD monitoring can prevent costly asset breakdowns and system failures.

How is partial discharge detected?

Partial discharge (PD) is detected using specialized sensors, with the type of sensor selected based on the monitored equipment and PD characteristics. Common sensors include Acoustic Emission (AA), Transient Earth Voltage (TEV), Ultra High Frequency (UHF), and High-Frequency Current Transformer (HFCT). Each sensor type is sensitive to different PD signals—acoustic, electrical, or electromagnetic—allowing accurate identification, localization, and monitoring of PD activity.

Where is PD monitoring used?

PD monitoring is used in medium- and low-voltage switchgear panels, cable joints and terminations, power transformers (bushings, tap changers, windings), motors and generators, gas-insulated switchgear (GIS), shunt reactors, surge arresters, instrument transformers, high-voltage capacitors, wind turbines, and photovoltaic inverters.

What are the differences between wireless and wired partial discharge (PD) systems?

The wired partial discharge sensor can be directly connected to the HMI via terminal interfaces for real-time parameter display, or via RS485 to connected the host computer for data monitoring without a screen.The wireless sensor need connect a wireless receiver, which can be linked to the HMI for real-time display or connected to the host computer via RS485 for parameter viewing.

Are there any distance limitations between the wireless partial discharge sensor and the wireless receiver?

The recommended distance between the partial discharge sensors and the receiver is within 20 meters to ensure stable communication and accurate data collection. This range helps maintain signal quality and minimize interference. For longer distances, use shielded cables or signal repeaters to ensure reliable performance.

Does the 3-in-1 partial discharge sensor trigger a common alarm, or does each detection channel alarm independently? How is the alarm triggered?

Each detection channel of the 3-in-1 sensor—AA, TEV, and UHF—operates independently with its own preset threshold. An alarm is triggered individually whenever any channel exceeds its threshold.

The system provides six alarm channels (Alarm 01-06), each assignable to one of six sensors, and equiped two digital outputs (DO). When a sensor channel exceeds its threshold, the main unit display changes the corresponding text color from white to red to indicate an alarm. Alarm channels assigned to DO outputs can also activate external devices—such as buzzers, indicator lamps, or other signaling units—for visual, audible, or control-based alarm notifications.

Can wired and wireless partial discharge sensors be connected together?

Yes. Wired partial discharge sensors are equipped with RS485 interfaces, and wireless sensors use receivers that also provide RS485 ports. Therefore, both wired and wireless sensors can be connected in series via the RS485 bus for unified data acquisition and monitoring.

FAQ for Electrical Enclosure Dehumidifier

How should I size a dehumidifier for an electrical enclosure or control cabinet?

Dehumidifier size refers to its removal capacity. This capacity is critical and is based on both the total square footage of the enclosure and its current relative humidity level. Undersizing a unit for a large or extremely damp area will result in poor performance.

What is the dehumidification capacity of Blue Jay Dehumidifier?

The max dehumidiifer capacity is 600ml/day.

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