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
Technology of Electrical Automatic
Metering solution & Electrical safety for Photovoltaic Systems
Blue Jay designs metering and relay solutions for every part of photovoltaic systems. These solutions help solar system components operate safely and efficiently.
Our PV System Metering & Protection Solutions
A PV system turns solar energy into usable electricity. Its key components are PV arrays, combiner boxes, grid‑tied inverters, monitoring instruments, and grid‑connection switches.
Large‑scale PV deployments require segmented metering, monitoring and control for safe, efficient operation. Comprehensive monitoring provides full system visibility for fast fault response and maximum yield, while real‑time metering improves overall energy efficiency.
To meet these needs, our portfolio covers applications from PV panels to energy‑storage batteries. We supply off‑the‑shelf and custom‑built solutions: energy meters, arc‑flash relays, insulation monitoring devices (IMDs), and earth‑leakage protection relays.
Energy metering for PV systems
PV energy meters are vital for solar systems. Single‑phase meters serve small residential sites; three‑phase meters support commercial, industrial and utility‑scale PV installations.
DC meters measure voltage, current and energy from PV arrays and storage inverters. Bidirectional AC meters installed at grid interconnection track two‑way power flow with the utility grid.
Compatible with inverters and switchgear, these energy meters log AC‑DC metrics such as power and power factor. Operators use this data to assess system health, generation efficiency, on‑site consumption and grid export for commercial rooftop, industrial and EPC grid‑tie solar projects.
Insulation Monitoring for PV Systems
Insulation layers on PV cables, modules and inverters can degrade due to rain, dust, high‑temperature exposure and ageing, which triggers ground faults.
Insulation Monitoring Devices (IMDs) provide critical ground‑fault protection for ungrounded PV systems. They continuously track insulation resistance between PV panels and earth, and support ungrounded PV systems rated AC 793V/DC 1100V, AC 690V/DC 1000V, and up to AC 1000V/DC 1500V.
Arc Flash Relays for PV systems
Arc‑flash protection relays are primarily deployed within PV combiner boxes and central inverters. Loose connections and component ageing can create high‑temperature DC arcs, which standard fuses often fail to detect and may lead to equipment damage or fire hazards.
Arc‑flash relays rapidly detect arc‑fault events, trigger alarms and initiate circuit disconnection to stop fault propagation and protect PV‑plant hardware and service personnel.
Earth Leakage Protection for PV Systems
Earth‑leakage protection relays are deployed on the DC‑side of central inverters. Meeting code‑mandated ground‑fault protection requirements for ungrounded PV arrays, they fit PV installations ranging from small‑scale sites to utility‑grade solar plants.
Compatible with systems rated AC 690V/DC 1000V, AC 793V/DC 1100V and up to DC 1500V, these earth leakage relays detect DC leakage current. They trigger alarms or initiate circuit disconnection upon fault detection to mitigate shock, equipment damage and fire hazards.
Solution Referenc for Diverse Solar PV Systems
Blue Jay PV protection and metering solutions fit a wide range of solar deployments, including rooftop, hybrid, utility‑scale, commercial and industrial PV systems. Designed for different operating environments, our products deliver reliable electrical protection and monitoring for small‑size rooftop installations up to large‑scale solar power plants.
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Liandong U valley Industrial Park,Hangzhou City, China
Jiangyin High-tech Zone, Jiangyin City, China