Fzn21 Series Indoor Vacuum Load Break Switch

• Customization: Available
• Transport Package: Fumigation Wooden Box
• Trademark: YQALT
• Model NO.: FZN21 Series Indoor Vacuum Load Break Switch

Product Description

FN18 High Voltage Indoor Load Switch 

Product Description

Product Overview:
The FZN21 series indoor medium-voltage (M.V.) vacuum load break switch and its fuse combination are designed for 12kV, 24kV, and 40.5kV, 50/60Hz power systems. It is widely used in industrial and mining areas, particularly for Ring Main Units (RMU) and terminal power stations. This switch effectively distributes, controls, and protects electrical power, and it complies with the standards IEC 60265-1, IEC 60420, GB16926, and GB3804. The FZN21 switch is composed of a frame, isolator, vacuum interrupter, earth switch, and spring mechanism, offering strong breaking capacity, safety, and long electrical endurance.

Application Environment:
The FZN21 series is ideal for medium-voltage power distribution systems in industrial and mining environments. It is especially suited for RMU and terminal power stations, where it plays a crucial role in ensuring the reliable distribution and control of electrical power.

Operating Conditions:

    1.    Voltage Range: Suitable for systems with operational voltage levels of 12kV, 24kV, and 40.5kV.
    2.    Frequency: Designed for use in 50/60Hz power systems.
    3.    Temperature Range: Functions effectively in a wide temperature range, from -10°C to +40°C.
    4.    Humidity: Capable of operating in environments with relative humidity up to 90%.
    5.    Pollution Level: Suitable for pollution level II environments, commonly found in industrial settings.

Usage Considerations:

    1.    Breaking Capacity: The FZN21 switch is capable of breaking on-load current, overload current, and, when combined with an XRNT fuse, it can break short-circuit current. This makes it highly reliable in protecting equipment under various fault conditions.
    2.    Safety Features: The switch includes a visible fracture and interlock between the isolator, vacuum load break switch (V-LBS), and earth switch (ES), preventing misoperation and ensuring safe operation.
    3.    Electrical Endurance: Designed for long-term reliability, the FZN21 switch offers excellent electrical endurance, reducing the need for frequent maintenance and replacements.
    4.    Compliance with Standards: The FZN21 series meets international and national standards, including IEC 60265-1, IEC 60420, GB16926, and GB3804, ensuring its quality and performance in medium-voltage applications.
    5.    Versatility: This switch is versatile and can be used in various configurations, making it suitable for different installation requirements in industrial and mining environments.

Key Features:

    •    High Breaking Capacity: Efficiently handles on-load, overload, and short-circuit currents.
    •    Safety-Oriented Design: Features visible fracture and interlocking mechanisms to prevent misoperation.
    •    Long Electrical Endurance: Designed for prolonged operation with minimal maintenance.
    •    Standards Compliance: Adheres to key international and national standards for medium-voltage load break switches.

Technical Specification
Rated voltage	kV	12	24	40.5
Rated current	A	630	630	630
Rated power frequency	Hz	50/60	50/60	50/60
Short circuit making capacity	kA Peak.	50	31.5	31.5
Peak withstand current	kA Peak.	50	50	50
Short time current	kA eff.
1Sec.		25
3Sec.		20	20	20
Max. breaking capacity in co-operation with fuses IEC 62271-105 IEC 420 1990-11)	A	2000	2000	1700
Max. fuse currentXRNT Fuse)	A	200	200	100
Power frequency withstand voltage 50Hz 1 min.:
To earth and between poles	kV	42	65	95
Across isolating distance	kV	48	79	110
lmpulse withstand voltage 1.2/50 μs:
To earth and between poles	kV	75	125	185
Across isolating distance	kV	85	145	215
Mechanism Endurance
Vauum interrupter	cycles	10000	10000	10000
Main switch and Earth Switch	cycles	2000	2000	2000