Blue Jay Launches BIM-CH2 A Dual Channel Insulation Monitoring Relay

Blue Jay Technology, a global leader in insulation monitoring solutions, announces the launch of the BIM-CH2 Dual Channel Insulation Monitoring Relay. This is an industrial-grade protective relay designed specifically for high-voltage, multi-circuit IT systems such as Battery Energy Storage Systems (BESS) and high-power DC charging piles, providing leakage and insulation safety monitoring.

As new energy platforms evolve towards higher voltage and greater integration, system operators urgently need a solution that can meet stringent electrical safety standards while significantly optimizing cabinet space and system BOM costs,” said Blue Jay Product Manager. BIM-CH2 was created precisely to address this pain point, pioneering true ‘one machine, two controls’ and digital data interconnection.

Meeting the Demands of DC Systems

Modern energy storage containers and supercharging stations are evolving towards 1000V high-voltage platforms, with multiple circuits (DC/AC, main/auxiliary circuits, etc.) coexisting within the system becoming the norm. However, the traditional single-channel IMD solution presents irreconcilable contradictions for developers and operators:

Space constraints: Control cabinet rail space is extremely limited, and installing multiple single-channel IMDs side-by-side makes internal layout extremely difficult.

Signal crosstalk: Multiple devices simultaneously injecting measurement signals into adjacent systems can easily cause severe interference, leading to frequent false alarms or missed alarms.

Hardware and labor costs skyrocket: Procurement, wiring, and subsequent operation and maintenance all require double the investment, directly dragging down the overall project cost control indicators.

Designed for Dual-channel DC System Applications

Addressing the complex electrical architecture of modern energy storage and industrial power grids, this series of insulation monitoring devices breaks through the physical limitations of traditional single-channel systems. Through the following three core advantages, it brings an unprecedented integrated experience to high-voltage multi-loop systems: Truly independent “one machine, two uses,” eliminating signal crosstalk: The IMD incorporates two completely electrically isolated independent measurement circuits. A single instrument can simultaneously and separately monitor two completely unconnected IT systems (e.g., channel A monitors the DC battery side of the energy storage, and channel B monitors the AC side of the downstream inverter). This fundamentally solves the unavoidable crosstalk problem when two devices coexist.

High voltage and large capacitance self-adaptation, fearless of complex operating conditions: Perfectly matching the high-voltage trend of modern energy storage and charging piles moving towards DC 1000V. The dual-channel IMD has a system leakage capacitance self-adaptation capability of up to 1000V. Even in complex environments filled with high-frequency harmonics and large capacitance, it can still maintain ultra-high accuracy in insulation resistance measurement, ensuring no missed or false alarms. Volume and hardware costs are reduced by 50%.

Cost control: Compared to the traditional solution of installing two single-channel devices, this dual-channel design directly cuts procurement costs and control cabinet rail space by half. Wiring time is halved, and subsequent maintenance workload is halved, truly achieving “reduction without compromise,” making it the ultimate tool for enterprises to achieve high standards of cost reduction and efficiency improvement.

Feature Highlights of Insulation Monitoring Relay

Wheatstone Bridge Measurement technology employs the classic

Wheatstone bridge topology and synchronously measures the insulation resistance of the positive and negative poles to ground through the precise balancing principle of the bridge arms. It eliminates the need to inject external signals into the system, fundamentally eliminating interference from signal injection on operating equipment and ensuring high-precision and high-stability real-time monitoring of insulation status in complex electromagnetic environments.

Dual-Level Independent Outputs

Each channel has independent “Alarm” and “Trip” relay contact configurations, supporting manual/automatic reset, perfectly matching the complex control and safety interlocking logic in the field.

Digital Industrial Interconnection and Data Logging (Modbus RTU & Data Logging)

Supports Modbus-RTU over RS485 digital communication, seamlessly integrating with field SCADA, EMS (Energy Management System), or PLC control platforms; built-in non-volatile memory ensures historical insulation resistance values and alarm event records are not lost during power failures or outages.

Standard DIN Rail & Seamless In-Situ Replacement (DIN-Rail & Drop-in Integration)

Utilizes a standard 35mm DIN rail housing design, compact and small, supporting in-situ replacement with mainstream traditional brand products on the market, eliminating the need for on-site maintenance rewiring or re-drilling.

Compliance Certification

The product strictly complies with EU CE certification and meets IEC 61557-8 (a stringent standard for insulation monitoring devices in IT systems) and industrial-grade EMC immunity standards such as IEC 62020 / GB/T 18268.

The new dual-channel insulation monitoring device is not simply a combination of functions, but uses digital and integrated technologies to help new energy and industrial customers regain control over both “safety and cost”.

About Blue Jay Technology

Since 2013, Blue Jay Technology has been a global leader in developing advanced insulation monitoring solutions for industrial, EV charging, ESS, PV system applications. Based in Chongqing, China. Blue Jay Technology is committed to using the latest technologies in the industry to develop innovative insulation monitoring devices. The product lines include DC insulation monitoring device, advanced power and energy meters, power quality analyzers, industrial arc flash relays, partial discharge monitoring, and more.

For more information about Blue Jay. and other metering & relay products, please visit cqbluejay.com.