Overview

The FN5-12 (RDL) type indoor high-voltage load break switch, complies with IEC420 and the 1990 version of the “High-Voltage Load Break Switch and Load Break Switchgear” standards. It features a compact design, lightweight construction, and is ideally suited for use in 10kV ring networks, distribution boxes, and substations. The switch allows for reliable load switching, isolation, and connection across three distinct working positions, ensuring safe operation in accordance with industry standards.

This load break switch is designed for use in AC 50Hz, 12kV networks, and is capable of breaking load currents and closing short circuit currents. When equipped with a fuse, it can effectively disconnect short circuit currents to protect the switchgear. It is compatible with the CS6-1 type manual operating mechanism, with a dedicated CS manual operating mechanism designed specifically for this product.

Type Designation for FN5-12 Load Break Switch

The FN5-12 type designation for the indoor load break switch is explained as follows:

F: Load Break Switch
N: Indoor Application
5: Rated Current (A)
12: Rated Voltage (kV)
D: With Fuse at the Top of the Switch
R: With Load Break
S: With Earth Switch

Note: For special requirements, please contact our technical team for tailored solutions.

Operating Environment Conditions

• Altitude: Not exceeding 1000 meters.
• Ambient Temperature: Maximum +40°C, Minimum -25°C.
• Relative Humidity: Daily average not exceeding 95%, monthly average not exceeding 90%.
• Locations free from conductive dust, corrosive gases, and water vapor.
• Free from continuous or severe vibration.

Main Technical Parameters of High-Voltage Load Break Switch

The technical parameters of the load switch used with the combined switchgear are as follows:

Name	Unit	Value
Rated Voltage	KV	12
Maximum Operating Voltage	KV	12
Rated Frequency	HZ	50
Rated Current	A	630
Rated Load Breaking Current	A	630
5% Rated Load Breaking Current	A	31.5
Rated Short-Circuit Breaking Current	A	10
Rated Moving Contact Current	A	40
Rated Transfer Current	KA	1.3
Rated Short-Time Withstand Current	KA	20
Rated Peak Withstand Current	KA	50
Mechanical Life	Cycle	2000

Note: The standard parameters listed above can be customized. For specific requirements, please contact our technical team.

Outline and Dimensions of Installation

Figure 1: FN5-12RD(L) Indoor High-Voltage Load Break Switch

1. Base Frame	2. Insulation	3. Arc Tube
4. Damping Equipment	5. Moving Contact	6. Arcing Rod
7. Guide Plate	8. Static Contact	9. Interruption Mechanism
10. Locking Mechanism	11. Load Break Switch Operating Mechanism	12. Ground Switch

Figure 2: Load Break Switch CS6-1 Type Operating Mechanism Installation Diagram

When placing an order, please specify the following details:

1. Type, name, and quantity of the product;
2.  Installation location, distance from the top bar, and bar diameter;
3. Operating method: manual or dual-purpose (manual and electric);
4. For special orders, kindly contact us for further assistance.

At Thomas Electric, we specialize in providing high-quality solutions for the FN5-12 (R) D High Voltage Indoor Load Break Switch. Our commitment to integrity, punctual delivery, competitive pricing, and excellent customer service has earned us the trust of clients worldwide. We focus on professional expertise, product reliability, and strong after-sales support to ensure a trusted partnership with every customer.

FAQs for FN5-12 (RDL) High-Voltage Load Break Switch

1. What are the primary applications of the FN5-12 (RDL) Load Break Switch?
   The FN5-12 (RDL) Load Break Switch is primarily used in high-voltage applications for breaking load currents, switching circuits, and providing protection in 12kV power systems, such as in substations and ring networks.
2. Can the FN5-12 Load Break Switch operate in extreme temperatures?
   The FN5-12 is designed to operate in environments with temperatures ranging from -25°C to +40°C. For environments outside this range, customized solutions may be necessary.
3. What makes the FN5-12 Load Break Switch reliable?
   The FN5-12 is equipped with a fuse for short-circuit protection, and its ability to handle both load and short-circuit currents ensures long-term reliability. It also complies with international standards like IEC420.
4. Is the FN5-12 Load Break Switch easy to install?
   Yes, the FN5-12 is designed for ease of installation, with compatibility with manual operating mechanisms and specific installation features like mounting holes and secured connections.
5. How long is the mechanical life of the FN5-12 Load Break Switch?
   The FN5-12 Load Break Switch is rated for 2000 mechanical operations, ensuring a long service life in high-demand environments.
6. Can the FN5-12 Load Break Switch be customized?
   Yes, the FN5-12 Load Break Switch offers customizable features, including specific voltage, current, and protection requirements, ensuring flexibility for various applications.

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