| Customization: | Available |
|---|---|
| Transport Package: | Fumigation Wooden Box |
| Trademark: | YQALT |
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FN7-12(24) Series Indoor Load Break Switch
Product Overview:
The FN7-12(24) Series Indoor Load Break Switch is specifically designed for three-phase AC power systems with voltage levels of 12kV and 24kV, operating at frequencies of 50/60Hz. This load break switch is used for breaking load currents and controlling short-circuit currents within the system. Additionally, the FN7-12R type, a medium-voltage load switch-fuse combination, is based on the FN7-12 series. The operating mechanism can be mounted on the side, as per customer specifications.
Application Environment:
The FN7-12(24) series is commonly employed in medium-voltage indoor distribution networks, particularly in utility, industrial, and commercial settings. These switches are suitable for environments where the reliable interruption of load currents and the control of short-circuit currents are necessary for system stability and protection.
Operating Conditions:
1. Temperature Range: The switch is designed to operate effectively within a temperature range of -5°C to +40°C.
2. Altitude: Suitable for installation in areas with altitudes not exceeding 1000 meters.
3. Humidity: Recommended for use in environments with relative humidity levels not exceeding 90%.
4. Pollution Level: Applicable for use in areas with a pollution level of up to class II.
Usage Considerations:
1. Voltage and Current Handling: Capable of handling 12kV and 24kV voltage systems, the FN7-12(24) series effectively interrupts load currents and manages short-circuit currents, ensuring system protection and operational safety.
2. Switch-Fuse Combination: The FN7-12R model offers enhanced protection by combining the load break switch with a fuse, providing an additional layer of safety in medium-voltage systems.
3. Customization Options: The operating mechanism can be customized to be side-mounted based on customer requirements, offering flexibility in installation and operation.
4. Routine Maintenance: Regular inspections should be conducted to ensure the proper functioning of the operating mechanism and the integrity of the switch components.
5. Operational Safety: Operators should be trained to handle the load break switch appropriately, particularly in scenarios involving high load and short-circuit currents.
Key Features:
• Versatile Application: Suitable for both 12kV and 24kV systems, offering a broad range of applications in medium-voltage networks.
• Enhanced Protection: The FN7-12R model provides additional short-circuit protection through the switch-fuse combination, making it a reliable choice for sensitive systems.
• Customizable Design: The ability to customize the operating mechanism placement allows for adaptable installations based on specific site requirements.
• Robust Construction: Engineered for reliable operation in indoor environments, ensuring long-term performance and safety.
| Technical Specification | ||||
| Rated voltage | kV | 12 | 24 | |
| Rated current | A | 400 | 630 | 630 |
| Rated power frequency | Hz | 50/60 | 50/60 | 50/60 |
| Short circuit making capacity | kA Peak | 31.5 | 50 | 50 |
| Peak withstand current | kA Peak | 31.5 | 50 | 50 |
| Short time current | kA eff | |||
| 1Sec. | 25 | 25 | 25 | |
| 3Sec. | 12.5 | 20 | 20 | |
| Max. breaking capacity in co-operation with fuses IEC 62271-105 (IEC 420 1990-11) |
A | 1600 | 1600 | 900 |
| Max. fuse current(XRNT Fuse) | A | 200 | 200 | 200 |
| Power frequency withstand voltage 50Hz 1 min,: | ||||
| To earth and between poles | kV | 42 | 42 | 55 |
| Across isolating distance | kV | 48 | 48 | 70 |
| Impulse withstand voltage 1.2/50μs: | ||||
| To earth and between poles | kV | 75 | 75 | 125 |
| Across isolating distance | kV | 85 | 85 | 145 |
| Mechanism Endurance | cycles | 2000 | 2000 | 2000 |
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