High-Quality High Voltage Air Load Breaker Fuse Switch FK(R)N12-12 for 12kV Systems | China Suppliers & Factory Supplier, Company
High-Quality High Voltage Air Load Breaker Fuse Switch FK(R)N12-12 for 12kV Systems | China Suppliers & Factory Supplier, Company
1 / 2
High-Quality High Voltage Air Load Breaker Fuse Switch FK(R)N12-12 for 12kV Systems | China Suppliers & Factory Supplier, Company
High-Quality High Voltage Air Load Breaker Fuse Switch FK(R)N12-12 for 12kV Systems | China Suppliers & Factory Supplier, Company

High-Quality High Voltage Air Load Breaker Fuse Switch FK(R)N12-12 for 12kV Systems | China Suppliers & Factory Supplier, Company

Introducing the FKN12-12D load switch and FKRN12-12D switch-fuse combination, specifically designed for 12kV three-phase distribution systems, making them ideal for transformer, cable, and line control applications. These top-quality products ensure reliable performance and are manufactured by trusted China suppliers. With rated currents of 630A for the FKN model and 125A for the FKRN model, they are equipped with high insulation, spring-operated mechanisms, and effective arc extinction housed in durable bell-shaped covers, Our compact and interlocked designs guarantee up to 2000 mechanical operations while withstanding harsh environments ranging from –25°C to +40°C and up to 2000m altitude. Perfectly suited for substations and ring networks, these switches comply with GB/T and IEC standards, offering safe load switching, overload protection, and short-circuit interruption for various urban and industrial applications, As a leading factory in the industry, we ensure that our products deliver superior quality and reliability, making them the preferred choice for your electrical distribution needs. Choose the FKN12-12D and FKRN12-12D load switches for ultimate safety and efficiency in your operations
Send Inquiry

Product Description

Type & Meaning

CJX2-D-4
No. Designation Element
1Rated short-time withstand current (kA)
2Rated current (A)
3Spring mechanism
4Earthing switch (optional)
5Rated voltage (kV)
6Design No.
7Indoor
8Air medium
9Load switch
CJX2-D-4
No. Designation Element
1Rated short-circuit breaking current (kA)
2Rated current of the maximum fuse equipped (A)
3Spring mechanism
4Earthing switch (optional)
5Rated voltage (kV)
6Design No.
7Indoor
8With fuse holder
9Air medium
10Load switch

Ambient Conditions

  • Ambient temperature: within -25℃ ~ +40℃;
  • Altitude: ≤ 2000m;
  • Ambient humidity: daily mean relative humidity ≤ 95% and monthly mean ≤ 90%;
  • Seismic intensity: ≤ Ms8;
  • Anti-fouling level: Class Ⅱ;
  • Operating atmosphere: The operation site should be free of flammable or explosive hazards, no water vapor or chemical corrosive gas, and no violent vibration.
Note: Please negotiate with the manufacturer if operating beyond the above-mentioned environmental conditions.

Product Display

cjx2-d-ac-contactor-right-view
cjx2-d-ac-contactor-top-view

Technical Parameters

Technical parameters of FKN12-12D series switch and FKRN12-12D series switch-fuse combinations are shown in Table 1
No. Item Unit FKN12-12D FKRN12-12D
1 Rated voltage kV 12 12
2 Rated frequency Hz 50 50
3 Rated current A 630 125
4 Rated insulation level 1min power-frequency withstand voltage To-ground, phase-to-phase kV 42 42
Isolating distance 48 48
Lightning impulse withstand voltage (peak) To-ground, phase-to-phase 75 75
Isolating distance 85 85
5 Rated short-time withstand current (kA) Load switch kA 25 -
Earthing switch 20 -
6 Rated short-circuit duration (short-time withstand time) Load switch S 4 -
Earthing switch 2 -
7 Rated short-circuit making current (peak) kA 50 -
8 Rated breaking current Active load breaking current A 630 -
Closed loop breaking current 630 -
Cable charging current 10 -
Breaking capacity of no-load transformer kVA 1250 -
9 Rated short-circuit breaking current (current-limit fuse) kA - 31.5
10 Rated transfer current A - 1200
11 Mechanical endurance time 2000 2000
Mechanical properties are shown in Table 2
No. Item Unit Parameter
1 Isolating distance mm ≥175
2 Phase-to-phase central distance 210±2
3 Phase-to-phase air clearance ≥125
4 Travel 210±4
5 Overtravel ≥40
6 Out of simultaneity of three-phase closing ms ≤10
7 Out of simultaneity of three-phase opening ≤15
8 Inherent opening time of shunt release 40~65
9 Main circuit resistance μΩ ≤130
For the current-limiting fuse in the switch-fuse combinations, the rated current of the fuse-link is selected based on the transformer capacity, and the reference parameters for selection are shown in Table 3
Transformer capacity (kVA) 100 125 160 200 250 315 400 500 630 750/800 1000 1250
Rated current of fuse (A) 10 12.5 16 20 25 31.5 40 50 63 80 100 125

Outline and Installation Dimension

CJX2-D-4
Frequently Asked Questions
Q1 What is the rated voltage of the FKN12-12D and FKRN12-12D series?
Both the FKN12-12D load switch and the FKRN12-12D switch-fuse combination are rated at 12 kV, making them suitable for medium-voltage indoor distribution systems.
Q2 What is the difference between FKN12-12D and FKRN12-12D?
The FKN12-12D is a standard air-insulated indoor load switch with a rated current of 630A, while the FKRN12-12D is a switch-fuse combination equipped with a fuse holder, rated at 125A, and is used for transformer protection circuits.
Q3 What are the ambient temperature and altitude requirements for installation?
The switch should be installed in environments with ambient temperatures between -25℃ and +40℃ and at altitudes not exceeding 2000m. Humidity requirements are a daily mean relative humidity of ≤95% and a monthly mean of ≤90%.
Q4 How is the rated current of the fuse selected for the FKRN12-12D switch-fuse combination?
The fuse-link rated current is selected based on the transformer capacity. For example, a 100 kVA transformer uses a 10A fuse, a 630 kVA transformer uses a 63A fuse, and a 1250 kVA transformer uses a 125A fuse. Refer to Table 3 for the complete selection guide.
Q5 What is the mechanical endurance of these switches?
Both the FKN12-12D and FKRN12-12D series are designed for a mechanical endurance of 2000 operations, ensuring long-term reliability in demanding switching applications.
Q6 Can these switches be used in environments with corrosive gases or explosive materials?
No. The operation site must be free of flammable or explosive hazards, chemical corrosive gases, and water vapor. For special environmental conditions beyond the standard specifications, users should consult with the manufacturer for customized solutions.

Related Products

OEM HH15(QSA) Knife Melt Isolation Switch with Fuse - Reliable Circuit Protection from China Suppliers and Factory Factories, Factory

OEM HH15(QSA) Knife Melt Isolation Switch with Fuse - Reliable Circuit Protection from China Suppliers and Factory Factories, Factory
Wholesale W1 ACB Intelligent Universal Circuit Breaker from China Suppliers and Factory for Reliable Power Protection Factories, Companies

Wholesale W1 ACB Intelligent Universal Circuit Breaker from China Suppliers and Factory for Reliable Power Protection Factories, Companies
Wholesale CJ19 Series Capacitor Switching Contactor 380V 50/60Hz - Reliable China Suppliers & Factory for Power Factor Correction Supplier, Factory

Wholesale CJ19 Series Capacitor Switching Contactor 380V 50/60Hz - Reliable China Suppliers & Factory for Power Factor Correction Supplier, Factory
ODM HR5 Fused Disconnect Switch - Reliable Circuit Protection from China Suppliers & Factory for 100-630A Loads Manufacturer, Factory

ODM HR5 Fused Disconnect Switch - Reliable Circuit Protection from China Suppliers & Factory for 100-630A Loads Manufacturer, Factory
China China XL-21 Power Distribution Cabinet: Low Voltage Switchgear Suppliers for Factories and Industrial Applications Supplier, Company

China China XL-21 Power Distribution Cabinet: Low Voltage Switchgear Suppliers for Factories and Industrial Applications Supplier, Company
High-Quality 500W DC to AC Power Inverter X500 with EU Socket - China Suppliers & Factory for Efficient Power Conversion Manufacturers, Companies

High-Quality 500W DC to AC Power Inverter X500 with EU Socket - China Suppliers & Factory for Efficient Power Conversion Manufacturers, Companies
China HD11F Single Throw Anti-Error Knife Switch - China Suppliers & Factory for Reliable Industrial Power Isolation Factory, Companies

China HD11F Single Throw Anti-Error Knife Switch - China Suppliers & Factory for Reliable Industrial Power Isolation Factory, Companies
High-Quality China Gas Insulated Ring Main Unit (RMU) Suppliers - SF6 Sealed Switchgear Factory for Reliable Power Distribution Manufacturers, Factories

High-Quality China Gas Insulated Ring Main Unit (RMU) Suppliers - SF6 Sealed Switchgear Factory for Reliable Power Distribution Manufacturers, Factories
OEM Eco-Friendly Gas Insulated Switchgear MRHBXGN-12(F) from China Suppliers and Factory for Smart Power Distribution Supplier, Manufacturer

OEM Eco-Friendly Gas Insulated Switchgear MRHBXGN-12(F) from China Suppliers and Factory for Smart Power Distribution Supplier, Manufacturer
Wholesale China Suppliers Factory Miniature Single-Phase Current-Limiting Protector with LCD Screen 220VAC for Enhanced Safety Manufacturers, Companies

Wholesale China Suppliers Factory Miniature Single-Phase Current-Limiting Protector with LCD Screen 220VAC for Enhanced Safety Manufacturers, Companies