Driven by booming AI development, computing centers adopt 800 V high‑voltage DC (HVDC) systems based on solid‑state transformers (SST), replacing traditional 400 V AC power distribution to meet high‑density GPU cabinet power demands. Running in unearthed IT mode, the 800 V DC system conceals severe safety risks. A single earth fault can go unnoticed during normal operation, while a second earth fault creates an immediate short‑circuit loop, possibly resulting in equipment fire, shutdown and large‑scale computing outages. Standard T/CMEEEA 261‑2026 mandates online insulation monitoring for these 800 V DC installations. The Acrel AIM‑T500L DC insulation monitoring device is developed for this scenario. Using the signal‑injection detection method, it applies to unearthed DC 0‑800 V and AC 0‑690 V systems. It continuously monitors positive‑ and negative‑bus‑to‑earth insulation resistance and activates pre‑warning and alarm outputs below configured thresholds. Paired with the ASG200 test signal generator, AIL200‑12 fault locator and supporting signal detectors, the complete system can accurately locate faulty feeder branches. Mounted inside SST or 800 V DC output cabinets, the AIM‑T500L works for both energized and de‑energized buses throughout the equipment lifecycle. Monitoring data is transmitted to superior controllers and O&M platforms for remote early warning and traceability. Its compact DIN‑rail design with pluggable terminals enables easy cabinet integration. This solution has been implemented in multiple domestic internet and telecom operator data‑center projects. With 800 V HVDC becoming standard AI infrastructure, insulation monitoring is no longer optional but mandatory safety equipment. The AIM‑T500L forms a reliable safety barrier for unearthed DC networks, mitigates double‑earth‑fault hazards and ensures stable operation for large‑scale AI computing facilities.

Production lines for lithium battery separators, optical films, release films, PCB coating, functional coatings, packaging anticorrosion and other applications are characterized by high-precision and continuous production conditions. These production lines are equipped with a large number of variable frequency drives, servo drives, heating modules, fans, RTO exhaust gas treatment equipment and other devices, which operate under frequent high-frequency start/stop conditions, dynamic speed regulation and instantaneous load fluctuations for long periods. They commonly experience electrical issues such as harmonic interference, frequent motor faults and coarse energy consumption data management, which directly affect coating accuracy, product yield, equipment service life and production costs. In response to the specific operating conditions of the coating industry, Acrel has launched an integrated electrical comprehensive management solution combining ANAPF harmonic mitigation, ARD motor protection, and AC/DC intelligent energy consumption monitoring. From three dimensions—power quality, equipment safety and energy consumption management—the solution enables refined management to support stable production, reduce faults, save electricity and quantify energy consumption data.

The 2nd Seminar on Safety Upgrades and Technological Innovation of Electrical Equipment in the Coal Chemical Industry took place in Yulin, Shaanxi on August 29‑30, 2026. Co‑hosted by the Process Industry Branch of the China Mechatronics Technology Application Association and Zhongneng Shuzhi Anke Engineering Technology Research Institute, the conference gathered experts, scholars and enterprise representatives across coal chemical and petrochemical sectors. Centered on “Digital Intelligence Empowering Electrical Safety, Innovation Driving Coal Chemical Industry Upgrades”, participants from CNPC, Sinopec, CHN Energy and other key enterprises and design institutes exchanged views on relevant policies, industrial pain points, cutting‑edge technologies and engineering practices, building a platform for technical exchange and project cooperation. Invited to the event, Acrel Electric (300286) exhibited its full‑set integrated solutions for electrical protection, power quality control and intelligent energy management. Highlighted offerings included the flexible reverse power flow protection solution built around AM5SE protection relays, ACCU microgrid controller and EMS energy management platform, as well as the “cloud‑platform‑plus‑hardware” distribution upgrade package combining AcrelEMS, APView500, ANAPF, ANSVG and other core products, to support safe, stable and efficient power operation for chemical plants. Acrel’s on‑site booth drew wide attention. Its technical team shared solution details and held in‑depth communications with attendees, receiving positive recognition from industry specialists. Preliminary intentions for technical and project cooperation were reached. Acrel will further optimize its process‑industry‑oriented solutions for electrical protection and smart energy management, and cooperate with industry partners to boost the intelligent and green transition of the coal chemical sector.

As the core node of the distribution network in power systems, 35kV substations face temperature anomalies on critical components such as high-voltage switchgears and line connectors, which constitute one of the major causes of power accidents. Combining the technical characteristics of Acrel wireless temperature measurement system and practical temperature monitoring requirements for 35kV substations, this paper analyzes the necessity and working principle of applying Acrel wireless temperature measurement technology. It elaborates the overall system architecture, hardware & software configuration and on-site implementation scheme deployed in substations. Field tests and operational verification prove its performance in temperature measurement accuracy, fault early warning and emergency handling. This research provides practical references for intelligent temperature monitoring and safe, stable operation of 35kV substations.

Arc-flash faults in switchgear assemblies are among the most severe types of failures. The resulting arc light can easily damage other components, leading to accident escalation and often causing significant economic losses. Arc-flash protection, by monitoring both arc light intensity and current variations, can promptly isolate faults, providing effective protection and reducing economic losses. This paper introduces the application and configuration schemes of the ARB series arc-flash protection devices for busbars in low-voltage power distribution systems, as well as for critical individual cubicles such as capacitor compensation cabinets and active filter cabinets. From this, the necessity of installing arc-flash protection becomes readily apparent.