Product Overview
The LW-252 is a split type, three-pole outdoor high voltage circuit breaker that uses sulfur hexafluoride (SF6) gas as its arc-extinguishing medium. Rated at 252kV with a 4000A continuous current and a 50kA short-circuit breaking capacity, it is engineered for high-precision switching at the top of the transmission voltage range — the 220kV-class networks where every interruption must be exact, repeatable, and fast.
The split type construction supports precise assembly and maintenance of each pole column, while the high-speed operating mechanism delivers consistent switching accuracy across thousands of operations. Insulation levels are specified for the full 252kV class: 460kV power-frequency withstand to earth and 1050kV lightning impulse withstand, with a 125kA peak withstand capability for the most severe fault dynamics. Manufactured in Zhejiang, China under an ISO9001-2000 certified quality system, with OEM/ODM customization available.
Key Features
Split type construction
The split type design separates the breaker into independently handled sections, supporting precise factory assembly, quality control, and straightforward site installation and maintenance.
4000A continuous current rating
High thermal capacity carries the heaviest transmission loads at 252kV without derating, covering main transmission corridors and large interconnection bays.
High-precision high-speed switching
Classified as a high-speed circuit breaker, the mechanism provides fast, repeatable contact travel for accurate switching duty across the service life.
50kA breaking with 125kA peak withstand
A 50kA short-circuit breaking current and 50kA short-circuit withstand current are backed by a 125kA rated peak withstand current and 125kA making current peak.
Full 252kV-class insulation coordination
460kV power-frequency withstand to earth (460kV + 146kV across the fracture) and 1050kV lightning impulse withstand to earth (1050kV + 206kV across the fracture).
Certified, customizable supply
Manufactured under ISO9001-2000 certification with customization and OEM/ODM service, MOQ of one piece, wooden-box packing, and a 12-month warranty.
Basic Info.
| Model NO. | LW-252 |
| Arc-extinguishing Medium | SF6 |
| Poles Number | 3 |
| Function | Circuit-Breaker Failure Protection, Overcurrent Protection |
| Product Name | Hv Sulfur Hexafluoride Circuit Breakers |
| MOQ | 1PCS |
| Customize | Yes |
| Rated Power-Frequency Withstand Voltage | to earth:460kv Fracture: 460+146kv |
| Rated Frequency | 50Hz |
| Rated Short-Circuit Breaking Current | 50ka |
| Rated Short-Circuit Withstand Current | 50ka |
| Transport Package | Wood Box |
| Trademark | HaiRui |
| Speed | High-Speed Circuit Breaker |
| Installation | Outdoor Installation |
| Type | Circuit Breaker |
| Certification | ISO9001-2000 |
| Service | OEM/ODM |
| Warranty | 12 Months |
| Rated Voltage | 252kv |
| Rated Lightning Impulse Withstand Voltag | to Earth:1050kv Fracture: 1050+206kv |
| Rated Current | 4000A |
| Rated Short-Circuit Making Current Peak | 125ka |
| Rated Peak Withstand Current | 125ka |
| Specification | Custom |
| Origin | Zhejiang,China |
Packaging & Delivery
| Package Size | 1.00cm*1.00cm*1.00cm |
| Package Gross Weight | 1.000kg |
Applications
- 220kV-class transmission substations as the primary circuit breaker
- High-capacity transmission corridors requiring 4000A continuous current
- Grid interconnection bays between regional networks
- Large power plant switchyards and generator feeder positions
- Substation projects specifying split type breaker architecture
Frequently Asked Questions
What does split type mean for this circuit breaker?
The split type construction divides the breaker into separately assembled sections, which supports precise manufacturing quality control and easier transport, installation, and maintenance on site.
What are the main ratings of the LW-252?
It is rated 252kV voltage, 4000A continuous current, 50kA short-circuit breaking and withstand current, 125kA making current peak and peak withstand current, at a 50Hz rated frequency.
What insulation levels does the breaker provide?
The power-frequency withstand voltage is 460kV to earth (460kV + 146kV across the fracture), and the lightning impulse withstand voltage is 1050kV to earth (1050kV + 206kV across the fracture).
Is the breaker suitable for outdoor installation?
Yes. It is specified for outdoor installation in a 3-pole configuration, designed for open-air transmission switchyards.
Can I order a customized version?
Yes. Customization is supported with OEM/ODM service from an ISO9001-2000 certified factory, MOQ of one piece, and a 12-month warranty from HaiRui.
Get a Quote
As an ISO9001-certified manufacturer based in Zhejiang, China, HaiRui supplies the LW-252 high voltage SF6 circuit breaker with flexible OEM/ODM service, customization support, and a 12-month warranty. Minimum order quantity is just one unit, and every breaker ships in a robust wooden export crate. Contact our engineering team with your ratings, altitude, and climate requirements for a detailed quotation and lead time.
FAQ
What does split type mean for this circuit breaker?
The split type construction divides the breaker into separately assembled sections, which supports precise manufacturing quality control and easier transport, installation, and maintenance on site.
What are the main ratings of the LW-252?
It is rated 252kV voltage, 4000A continuous current, 50kA short-circuit breaking and withstand current, 125kA making current peak and peak withstand current, at a 50Hz rated frequency.
What insulation levels does the breaker provide?
The power-frequency withstand voltage is 460kV to earth (460kV + 146kV across the fracture), and the lightning impulse withstand voltage is 1050kV to earth (1050kV + 206kV across the fracture).
Is the breaker suitable for outdoor installation?
Yes. It is specified for outdoor installation in a 3-pole configuration, designed for open-air transmission switchyards.
Can I order a customized version?
Yes. Customization is supported with OEM/ODM service from an ISO9001-2000 certified factory, MOQ of one piece, and a 12-month warranty from HaiRui.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
