Product Overview
Pole-Mounted SF6 Circuit Breaker from a Professional Power Equipment Manufacturer
The LW3-12 SF6 circuit breaker is able to provide reliable overcurrent and short-circuit protection in outdoor 12kV distribution lines. The main reason for this reliability is that it employs SF6 gas in the form of an arc-extinguishing medium.
Applications & circuit protection
The SF6 breaker of this type which is affixed on a pole is suitable for overhead distribution lines and transformer feeds wherever it is necessary to ensure the stability of the work of the appliance.
- Overhead distribution: Protection of the line at an interval of twelve kilovolts.
- Pole-mounted equipment: Small circuit protectors placed on poles.
- Rural lines: Reliable switching in suburbs.
- Station feeds: Protection of the outgoing line
Construction & operating reliability
The gas-pressure arc-extinguishing construct with SF6 medium offers excellent breaking performance and low overvoltages in cases of switching of both capacitive and inductive currents.
- The arc-extinguishing mechanism has a very short arc extinction time.
- It breaks the load current, the overload current and the short-circuit current.
- It also features low re-ignition and re-combustion parameters when switching.
- It executes outdoor pole-mounting construction.
- The long life of mechanical cycle is guaranteed for repeated performance of operations.
Technical Parameter
| Parameter | Value |
| Rated voltage | 12 kV |
| Rated frequency | 50 Hz |
| Rated current | 630 A |
| Rated short-circuit breaking current | 16 / 20 kA |
| Power-frequency withstand (1 min) | 42 kV |
| Lightning impulse withstand | 75 kV |
| Rated operating sequence | O–180s–CO–180s–CO (Type I) |
| Mounting | Outdoor pole mounted |
| Standard | IEC 62271 / GB 1984 |
Breaker Cost & Quotation
Please send us your inquiry for a quote on the SF6 Circuit Breakers specifying the required ratings, current values, maximum breaking power levels and the required quantity. The distributor price plus quantity discounts apply for a purchase order placed with you.
- Quick quoting for standard ratings
- No-cost OEM branding options are available
- Export packing is included
Breaker Wiring & Control Connection
Power connections are established between the circuit breaker and the circuit, while the control connections receive close/open signals and auxiliary contacts. The wiring diagrams and connection labels come with the SF6 Circuit Breaker.
- Terminals for power are marked according to the drawing;
- Control circuit is prepared and tested;
- Indication contacts are also available.
Compare Breaker Options
Select the right breaker for your duty:
| Feature | This Breaker | Alternative |
| Voltage | As specified | Other classes available |
| Breaking | Per model | Higher breaking on request |
| Mechanism | Spring / magnetic per model | Manual or motor operation |
| Mounting | Indoor / outdoor per model | Pole or panel mounting |
Export Markets & Country Compatibility
The SF6 Circuit Breaker is sold by power producers and vendors in Asia Pacific, Middle East, Africa, and Latin America. Various parameters are set according to the market in question.
Breaker Dimensions, Weight & Packing
The weight and dimensions of a breaker are based on the voltage class of the breaker and the type of operation. Breakers for outdoor use but mounted on poles are made small and less heavy to enable easy installation, while breakers for indoor use are delivered as fully made-up for installation into the panel. The weight and the dimensions are confirmed in order drawings.
- Dimensions from the model drawing
- The mechanism is locked and the poles are protected for delivery
- The mounting accessories are supplied
Standards & certifications
Built according to IEC standards 62271 and GB 1984, the LW3-12 comes with type approval certificates.
- Complies to IEC 62271 / GB 1984.
- Uses SF6 as an arc-extinguishing medium.
- Suitable for outdoor use.
- Boasts a 16/20 kA breaking capacity.
OEM & B2B supply support
Being an accomplished maker, and supplier of power equipment, Subian Electric has established itself as a premier supplier of SF6 circuit breakers to utilities, EPC contractors, and other distributors offering samples and technical support.
Please get in touch with us regarding other options or designs you may want and the quantity you need.
- We have samples ready for tests.
- We offer flexible quantities.
- We offer OEM and ODM solutions.
- We provide custom marking and packing of your order.
- Our technical documents and certificates have got your back.
Frequently Asked Questions
What is the LW3-12 used for?
It shields 12 kV outdoor distribution lines from excess loads and short circuits. It is intended to be installed on poles or structures of the network.
Why SF6 arc extinction?
The function of the SF6 is the rapid and clean extinguishing of the arc due to its strong breaking ability and low overvoltage generated during the switching operation.
What is the breaking capacity?
Breaking capacity is a nominal short circuit breaking current of either 16kA or 20 kA for the respective models at 12 kV, 630 A.
Is it suitable for remote areas?
The LW3-12 is an ideal explanation for the rural zones due to its compact dimensions and reliable performance.
