Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses
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Product Highlights
- SF6-free air-puffer mechanism utilizes compressed air cylinders to quench arcs instantly during opening, delivering an environmentally sustainable insulation profile.
- Rigid integrated mechanical interlocking framework coordinates the main blade and earthing switch to eliminate accidental closing onto energized lines.
- Modular base allows flexible coupling with high-voltage current-limiting fuses, transforming the unit into an LBS-fuse combination with an automatic striker trip function.
Product Attributes
- Customization
- Available
- Breaking Capacity
- High Voltage Switchgear
- Operation
- Manual Type
- Model NO.
- FN18-12
- Speed
- Normal Type Circuit Breaker
- Arc-extinguishing Medium
- Air
- Installation
- Indoor Wall-Mounted / Switchgear Track Mounted
- Structure
- as Specification
- Poles Number
- 3
- Type
- Load Break Switch
- Function
- Load Breaking and Making Capacity
- Certification
- ISO9001-2000
- Product Name
- Fn18 Load Break Switch
- Arc Extinguishing Medium
- Air Insulated
- Rated Voltage
- 12kv / 24kv
- Rated Current
- 630A
- Rated Frequency
- 50Hz / 60Hz
- Combination Type
- Basic Switch / Fuse-Switch Combination
- Application
- High Voltage Switchgear
- OEM
- Accept
- Transport Package
- Standard Export Packaging
- Specification
- 12kV
- Trademark
- Liyond
- Origin
- China
- Package Size
- 110.00cm * 105.00cm * 62.00cm
- Package Gross Weight
- 132.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses
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Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses -
Fn18-12 Sf6-Free Load Break Switch Nalf Air Insulation Switch Breakers Fuses
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Product Description
FN18 series Indoor High Voltage Load Break Switch Nalf Air Insulation Switch Breakers Fuses
FN18 is a general purpose, three-pole, load break switch that offers switchgear owners and assemblers the advantages of an advanced interrupting technology and proven, dependable performance in a compact design. The switch is available to switchgear assemblers as a building block for metal-enclosed and pad-mounted switchgear applications in ratings from 12-40.5 kV.
The standard FN18 switch includes a heavy-duty steel frame with stand-off insulators, a unique puffer-type arc extinguishing system, an operating mechanism and current-carrying components, including blade-type interrupters with cast hinges and jaw connectors.
Optional accessories and features include a variety of operating handles, a motor operator, auxiliary switches, a shunt trip device, fuse bases, mechanical fuse tripping, grounding switches, mechanical door interlocking and key interlocking.
FN18 series indoor high-voltage load switch has the advantages of easy design, operation, compact structure, small volume, full function, light weight, fast breaking and closing speed and high reliability. It is suitable for AC 50Hz, rated voltage 12kV, 24kV, rated current 630A and three-phase distribution system, especially for city network construction and renovation projects, high-rise buildings, ring network power supply of public facilities, and is an ideal product for box-type substation and transformer protection.
Technical parameter
| Rated voltage | Unit | 12kV | 17.5kV | 24kV | 36kV | 40.5kV | |||||||||||
| Rated current | A | 400 | 630 | 1250 | 400 | 630 | 1250 | 400 | 630 | 1250 | 630 | 800 | 1000 | 630 | 800 | 1000 | |
| Max. rated current | A | 400 | 630 | 1250 | 400 | 630 | 1250 | 400 | 630 | 1250 | 630 | 800 | 800 | 630 | 800 | 800 | |
| Short circuit making capacity | KA peak | 67 | 50 | 50 | 50 | 50 | |||||||||||
| Peak withstand current | KA peak | 82 | 82 | 82 | 66 | 66 | |||||||||||
| Short time current | 1 sec. | KA eff |
31.5 25 20 |
31.5 25 20 |
31.5 25 20 |
31.5 25 |
31.5 25 |
31.5 25 |
25 25 16 |
25 25 16 |
31.5 25 16 |
25 | 25 | 25 | 25 | 25 | 25 |
| 2 sec. | |||||||||||||||||
| 3 sec. | |||||||||||||||||
| Mainly active load breaking capacity 21 (test duty 1 and, IEC 60265-1( 265)) | A | 400 | 630 | 1250 | 400 | 630 | 1250 | 400 | 630 | 1250 | 630 | 800 | 630 | 800 | 630 | 800 | |
| Mainly capacitive breaking capacity (test duty 4, IEC 60265-1 (IEC 265)) | A | 150 | 45 | 80 | 50 | 50 | |||||||||||
| Mainly inductive breaking capacity cosφ=0.15 | A | 16 | 16 | 16 | 16 | 16 | |||||||||||
| Max. breaking capacity in co-operation with fuses IEC 62271-105(IEC 420 1990-11) | A | 1600 | 1600 | 1600 | 1600 | 900 | 900 | 300 | 300 | 300 | 300 | 300 | 300 | ||||
|
Power frequency withstand voltage 50 Hz 1 min. -to earth and between poles -across isolating distance |
kV |
42 45 |
45 60 |
55 70 |
80 88 |
95 120 |
|||||||||||
|
Impulse withstand voltage 1.2/50 μs - to earth and between poles - across isolating distance |
kV |
75 85 |
95 110 |
125 145 |
170 195 |
190 220 |
|||||||||||
| Pole distance | mm | 150, 170, 210 | 170, 210 | 170, 235, 275 | 360 | 360 | |||||||||||
|
Max. operating torque at: -closing K/A mech. -opening K/A mech. |
Nm | 115-120 Nm K-mech.120 Nm/A-mech. 3Nm |
80-100 Nm K-mech.80-100 Nm |
||||||||||||||
| Operating angle on the shaft | degree | 130 | 120 | ||||||||||||||
| Opening time | ms | 40-60 | 60 | ||||||||||||||
Structure
Q: Could I have prices of your products?
A: Welcome. Please feel free to send us inquiry here. We will reply you within 24 hours.
Q: Can I get a sample before the bulk order?
A: Yes, we welcome sample order to test and check quality.Mixed samples are acceptable.
Q: Can we print our logo/ company name on products?
A: Yes, of course, we accept OEM, then need you to provide brand authorization to us
Q:Do you accept product customization?
A:Yes, of course, please provide specific drawings or parameters, we will quote you after evaluation
Q: What is the lead time?
A: The lead time depends on the quantities ordered, generally within 7-20 days after receiving the payment.
Q: What is your Trade Terms?
A: We accept EXW, FOB, CIF, FCA, etc.
Q: What is your payment method?
A: We accept T/T, Western Union, Paypal, irrevocable L/C at sight, etc
Q: Do you inspect the finished products?
A: Yes, each step of production and finished products will be came out inspection by QC department before shipping. And we will provide goods inspection reports for your reference before shipment
Q: How to solve the quality problems after sales?
A: Take photos of the quality problems and send to us for our checking and confirming, we will make a satisfied solution for you within 3 days.
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASI223330". Items marked "
" are certified.
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Company Profile
Yueqing Liyond Electric Co., Ltd. Was established in 2011, with its headquarters located in Yueqing, Zhejiang Province - known as the "Capital of Electrical Equipment" in China. To continuously expand our business scale, the company established Hangzhou Liyond Electric Co., Ltd. In 2024 as a branch to further extend our business footprint. As a professional enterprise specializing in the research, development, and production of medium and high voltage switchgear and components, we have been deeply engaged in the power transmission and distribution field for over 15 years, committed to providing customers with high-quality products and services.
We specialize in the manufacturing and distribution of KYN28 switchgear, ring main units, gas-insulated switchgear, and associated equipment components. With continuous innovation and technological advancements in both application and development, Liyond Electric has successfully obtained more than 10 proprietary patents to date.
Our products are exported to regions including the United States, Europe, South America, Africa, Central Asia, Southeast Asia, and the Middle East. We have established long-term cooperative relationships with globally renowned enterprises such as ABB, Schneider Electric, Eaton, GE, Cooper, TEL, and CG. With our high-quality products and stringent standards, we have gained extensive recognition in the international market.
We possess an exceptional management team and a dedicated technological innovation team. Guided by customer needs and centered on industry standards and professional expertise, we implement quality control throughout the entire production and process control system. Based on the principle of mutual benefit and win-win cooperation, we have earned extensive trust and support from our clients.
Liyond Electric will continue to deepen its market presence, drive technological advancement through innovation, accelerate intelligent transformation, actively expand its global perspective, and strive to become a leading brand in the industry both domestically and internationally.
We warmly welcome customers from all over the world to establish cooperation and create a better future.
About Our Factory & Business Background
-
Business Type
- Trading Company
- Address
- Room 1801, building 2, 3 and 4, headquarters economic Park, No. 6688, Xuyang Road, Chengdong street, Yueqing City, Zhejiang Province
-
Plant Area
- 1100 square meters
-
Number of Employees
- 18
-
Registered Capital
- 5,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Ningbo Port, Shanghai Port
Our Production Capability & Technical Expertise
-
Main Products
- Medium and High Voltage Switchgear, Switchgear Accessories, Vacuum Vircuit Breaker, Vacuum Circuit Breaker Accessories, Earthing Switch, Load Break Switch, Auxiliary Switch, Conductive Parts, Insulation Parts
-
R&D Engineers
- 2 people
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2011-04-07
- Export Year
- 2011-04-07
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)
-
Number of Foreign Trading Staff
- 7
-
Overseas Agent/Branch
- No
Our Certifications, Standards & Industry Recognition
-
Product Certification
- CE
FAQ
- How does the air puffer mechanism of this 12kV LBS extinguish arcs without SF6 gas?
- The FN18-12(D) utilizes a mechanical piston assembly tied to the main shaft. During the opening sequence, the piston compresses air inside the cylinder and jets it onto the separating contacts, cooling and quenching the thermal arc at current zero without using greenhouse gases.
- What occurs when a single-phase fuse blows in the LBS-fuse combination assembly?
- When any phase fuse clears a fault, its high-velocity striker pin extends and impacts the internal trip linkage of the FN18 switch. This mechanically forces all three phases of the load break switch to open simultaneously, avoiding single-phasing conditions.
- Is this indoor air puffer load switch compatible with standardized cubicle switchgears?
- Yes. This unit is configured for standard air-insulated switchgear (AIS) cubicles, including fixed-type panels such as GG-1A, XGN2, and various localized compact substations, requiring minimal structural customization.
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