Application of HDC anti-opening connector in smart grid
The production and utilization of electric power are segmented into six key areas: power generation, transmission, substation, distribution, consumption, and dispatching. Of these, the distribution segment is particularly vital, as it brings electricity closer to everyday life—next only to actual power delivery. Equipment like distribution transformers, including box substations and pole-mounted substations, steps down voltages from levels such as 35kV, 10kV, and 6kV to 400V for regular consumers (line voltage at 400V and phase voltage at 220V). As cities grow and expand, the complexity of connections within the distribution network also increases. Ensuring a safe, reliable, and low-maintenance distribution system while minimizing outages has become a top priority for utility providers.
To enhance safety and reliability, the concept of the intelligent grid—or smart grid—has emerged as a solution. By integrating automated terminal cabinets into traditional power distribution networks, utilities can monitor equipment usage and the grid in real time, allowing for rapid fault management and load transfers. This shift moves away from centralized control stations toward virtual solutions aimed at optimizing, monitoring, and maintaining the power system.
One notable advancement in this area is the HDC anti-opening connector, specifically designed for grid intelligence in the secondary circuits of current transformers (CTs). In power systems, CTs must maintain a continuous circuit during operation, as opening their secondary circuit can generate dangerous induced potentials, risking both personnel safety and equipment damage. The HDC anti-opening connector addresses these concerns by providing an automatic short-circuit mechanism that ensures the secondary circuit remains closed even when disconnected.
This innovative connector finds applications across various intelligent grid devices, such as feeder terminals (FTUs), transformer terminals (TTUs), ring main units, distribution rooms, switchgates, and box substations. Its design guarantees safety by automatically shorting the circuit upon disconnection, preventing hazardous interruptions.
For instance, during insertion, the female jack connects before the male pin, keeping the circuit shorted. Further insertion triggers the action mechanism, opening the internal circuit while maintaining external connectivity. Upon full insertion, the device operates normally. The reverse occurs during removal.
Built on Weidmüller's proven RockStar® heavy-duty connector technology, HDC anti-opening products offer customization options for 6-core, 4-core, and 2-core configurations, handling currents up to 40A with short-term withstand currents reaching 480A. With features like screw connections, secondary shielding, and clear wiring, these connectors streamline installation and maintenance. Their rectangular design simplifies error-free insertion and enhances field efficiency, significantly reducing secondary wiring by over 90%. This has led to shorter maintenance times and improved project outcomes, earning praise from clients in the power sector.
In conclusion, the integration of intelligent solutions like the HDC anti-opening connector represents a significant leap forward in grid modernization. These advancements not only enhance operational efficiency but also prioritize safety and reliability—a critical step toward future-proofing our energy infrastructure.
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