FZN25-12, FZN25-12R. D vacuum Load switches and combination devices are suitable for use in three-phase AC 50Hz ring networks or terminal power supply and industrial electrical equipment for load control and sho-circuit protection. ey are used for load control, closed-loop current, no-load transformer, and cable charging current. Combination appliances can disconnect any current up to the rated sho-circuit current. Adopting direct action isolation fracture and vacuum arc chamber linkage. It has manual and electric functions.

The unique transmission structure design of FZN25-12 and FZN25-12R. D allows the arc extinguishing chamber to only withstand High Voltage at the moment of closing and opening, resulting in a small size and light weight.

FZN25-12 and FZN25-12R. D can achieve one-time operation of isolating the fracture and extinguishing chamber fracture.

FZN2512 and FZN25-12R. D can have a grounding valve that is interlocked with the grounding switch between the static contact and the moving contact conductive cylinder, ensuring safety and facilitating maintenance.

1.Model and meaning

Note: 1. e conventional operation direction is to operate on the right side of the load switch, not on the left side, but on the Zu side. For the front side, the operation should be on the Zn side

          2. The rated current of the Fuse (A) is 50, 100, 125, 160, 200, which can be selected by the user according to their needs

2.Environmental conditions for use

Altitude: not exceeding 2000m;

Environmental temperature: maximum temperature+40 ° C; Minimum temperature: -15 ° C;

Relative humidity: ≤ 95%;

Seismic intensity: Level 8;

Installation location: A place where there is no dripping water, re, explosion hazard, serious pollution, chemical corrosion, or severe vibration.

3.Main technical parameters

Project			Unit	Parameter
				FZN25-12DT630-20	FZRN25-12D/T200-31.5
Rated voltage			KV	12
Rated current			A	630	200
Rated frequency			Hz	50
Rated  Insulation  level		1-minute power frequency   withstand voltage	KV	Arc extinguishing chamber fracture 30; To the ground,            the same 42; Isolation fracture 48
		Lightning impulse   withstand voltage	KV	Same as ground, 75; Isolation fracture 85
Rated short-circuit withstand time			KA	20
Rated short-circuit duration			s	4
Rated peak withstand current			kA	50
Rated active load breaking current			A	630
Rated closed-loop breaking current			A	630
Rated cable charging breaking current			A	10
Disconnect the capacity of the no-load     transformer			kVA	1600
Rated short-circuit breaking current			kA	-	31.5
Rated transfer current			A		2000
Fuse model					SDLAJ-12 SFLAJ-12
Impactor output energy			J		1+0.5
Rated short-circuit closing current			kA	50	80 (expected peak)
Rated short-time withstand current of   grounding switch			kA	20
Rated short-time duration of grounding   switch			s	2
Rated peak withstand current of   grounding switch			kA	50
Rated voltage of auxiliay circuit			V	220   110
Mechanical lifespan			Once	10000

4.Appearance and installation dimensions

Installation Techniques for High Voltage Isolation Switches

High Voltage Isolating Switch Installation Tips

Installing a high voltage isolating switch is a critical task in electrical systems, ensuring safety, efficient operation, and compliance with industry standards. Here are some essential tips for the proper installation of these switches.

1. Understand the Switch Type and Purpose

Before installation, it’s crucial to understand the specific type of isolating switch being used. High voltage isolating switches serve to disconnect a section of the circuit, allowing maintenance or repair work to be performed safely. They are designed to handle high-voltage currents and must meet stringent safety regulations.

2. Select the Appropriate Location

The switch should be installed in an easily accessible location. Ensure that the site is free from environmental hazards, such as water or excessive heat, which could interfere with the operation of the switch. The installation area should provide enough space for proper ventilation and maintenance access.

3. Ensure Proper Grounding

Proper grounding of the isolating switch is essential to avoid electrical shocks. Make sure that all grounding systems are installed according to the manufacturer’s instructions and industry standards. Check the grounding resistance using an appropriate meter to confirm the effectiveness of the ground connection.

4. Follow Manufacturer’s Installation Instructions

Each high voltage isolating switch comes with a set of detailed installation instructions from the manufacturer. These instructions must be followed to ensure the switch operates correctly and safely. Pay close attention to the recommended torque values for screws and bolts, as well as any special mounting requirements.

5. Use Correct Tools and Equipment

When installing the isolating switch, use the right tools for the job. This includes insulated tools for working around live components, torque wrenches for accurate tightening, and proper lifting equipment for heavy switches. Using the correct tools ensures the installation is performed safely and in compliance with industry standards.

6. Verify Electrical Compatibility

Ensure that the isolating switch is compatible with the electrical system’s voltage, current ratings, and other parameters. The switch must be rated for the specific voltage level and should be able to withstand short circuits and overloading situations.

7. Check for Adequate Clearances

When installing the isolating switch, make sure that there are sufficient clearances around the device to avoid interference with surrounding equipment. This includes maintaining proper distances from other electrical components to minimize the risk of arcing or other electrical faults.

8. Implement Safety Procedures

Safety must be a top priority during installation. Make sure that all power is turned off before starting work on the isolating switch. Use lockout/tagout procedures to ensure the system remains de-energized during installation. Install warning signs around the work area to alert personnel to the ongoing work.

9. Test the Switch After Installation

Once the switch is installed, perform a series of tests to verify its functionality. This includes checking the switch’s ability to isolate circuits properly and confirming that all mechanical and electrical components are operating as intended. Additionally, test the Insulation resistance to ensure there is no leakage current.

10. Regular Maintenance and Inspections

After installation, establish a regular maintenance schedule to inspect and test the isolating switch. Over time, wear and tear can affect the performance of the switch, so it’s essential to regularly check for signs of damage or degradation. Keeping a maintenance log and performing periodic inspections will help avoid unexpected failures.

Conclusion

The installation of high voltage isolating switches requires careful planning, attention to detail, and adherence to safety protocols. By following these installation tips and considering the manufacturer’s guidelines, you can ensure a smooth and safe installation process. Proper installation and maintenance will help extend the life of the switch, reduce downtime, and ensure safe operation of electrical systems.