RN2 Indoor High Voltage Current Limiting Fuses are dedicated protective devices for 6kV, 10kV, and 35kV power systems. Specially designed for voltage transformer (PT) circuit protection, they feature a proven structure and reliable performance, and are widely used in various indoor high-voltage distribution facilities.
These dedicated protective devices are engineered to meet the specific protection requirements of voltage transformer circuits in diverse indoor power environments.
The core application is dedicated protection for the primary side of indoor voltage transformers in substations. They are designed to quickly isolate faults such as internal short circuits and insulation failures, serving as essential safety accessories for voltage transformers.
They are widely installed in indoor high-voltage switchgears, dedicated PT cabinets, and metering cabinets of industrial enterprises and urban distribution rooms. They protect voltage transformers used for metering, measurement, and monitoring, ensuring accurate and reliable power measurement data.
In the in-house high-voltage distribution rooms of large factories, industrial parks, and commercial complexes, RN2 fuses are deployed in voltage monitoring and relay protection circuits. They adapt well to enclosed indoor environments and ensure stable operation of distribution systems.
They are extensively used in voltage sampling circuits of indoor box substations, high-voltage ring main units, and distribution automation terminal equipment. With excellent space adaptability, they are ideal for compact cabinet layouts.
RN2 Indoor High-Voltage Current-Limiting Fuses feature a standard 0.5A rated current, perfectly matching the no-load low-current characteristics of voltage transformers. This precise alignment with PT circuit parameters makes them the ideal dedicated choice for voltage transformer protection.
Constructed with a quartz-sand-filled porcelain tube, the fuses quickly limit peak short-circuit currents and extinguish arcs instantaneously under fault conditions. This effectively prevents voltage transformer burnout or explosion and stops fault propagation.
Built with high-strength insulating ceramic housings and a fully sealed design, the fuses offer excellent resistance to moisture, dust, and contamination. They are ideal for enclosed, dry indoor conditions and maintain stable insulation performance during long-term operation.
With precise time-current characteristics, the fuses reliably withstand normal voltage transformer magnetizing inrush currents without false tripping in daily operation. They act reliably only when short circuits and internal faults occur, delivering outstanding protection selectivity.
Featuring a compact structure and standardized dimensions, the fuses fit perfectly into mounting positions of standard high-voltage cabinets. They can be disassembled and replaced easily without special tools, greatly cutting down maintenance work and power outage duration.
Supported by mature production technology and superior durability, RN2 Indoor High Voltage Current Limiting Fuses contain no moving parts and achieve virtually maintenance-free daily use. Featuring low procurement costs and long service life, they effectively lower overall operation and maintenance costs for power distribution projects.
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