FKRN12-24D Indoor 24kV High Voltage Vacuum Load Break Switch and Fuse Combination Apparatus
The FKRN12-24D is a high-performance indoor high-voltage load break switch and fuse combination apparatus designed for 24kV power distribution systems. It serves as a reliable protection and control device for transformers, cables, and overhead wiring in rural and urban terminal substations. Featuring an automatic three-phase braking mechanism that triggers when a fuse blow, it ensures maximum system safety and prevents single-phase operation. This compact, manually operated switch is an ideal solution for ring network power supply and prefabricated substations.
FKRN12-24D Indoor High Voltage Load Break Switch and Fuse Combination Apparatus
Product Overview
The FKRN12-24D is a high-performance indoor high-voltage pneumatic load break switch and fuse combination apparatus. It is specifically designed as a protective and control device for transformers, cables, and overhead wiring in rural and urban terminal substations, prefabricated substations, and ring network power supply systems.
This series is engineered to prevent single-phase operation; when a phase or multiphase fuse blow occurs, the load break switch automatically triggers a three-phase opening. It offers a compact structure and reliable performance for modern power distribution networks.
Key Features
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Integrated Protection: Equipped with high-voltage current-limited fuses (with strikers) to act as a reliable protector for critical electrical equipment.
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Automatic Safety Mechanism: Features an automatic three-phase braking system that activates immediately upon fuse failure.
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Manual & Reliable Operation: A manual operation type switch with a dedicated operating handle for ease of use.
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Compact Structure: Designed for easy maintenance with a standard phase distance of 300mm.
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Safety Interlocks: Equipped with an integrated grounding switch for enhanced operator safety during maintenance.
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Right-Hand Mechanism: The operating mechanism is conveniently installed on the right-hand side of the unit.
Technical Specifications
Main Technical Parameters
| Item | Unit | Data |
| Rated Voltage | kV | 24 |
| Rated Current | A | 630 |
| Rated Power Frequency | Hz | 50 |
| Rated Short-circuit Making Current | kA | 50 |
| Rated Short-time Withstand Current (2s) | kA | 20 |
| Rated Breaking Transfer Current | A | 1050 |
| Mechanical Life | Times | 2000 |
| Rated Cable Charging Breaking Current | A | 16 |
Mechanical Performance
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Middle Distance of Poles: $300 \pm 3$ mm
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Travel of Conductive Rod: $290 \pm 5$ mm
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Closing Speed: 2.8 m/s
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Opening Speed: > 1.7 m/s
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