Product Overview
The LW36-126 is a three-pole outdoor high voltage circuit breaker that uses sulfur hexafluoride (SF6) gas as its arc-extinguishing medium. Rated at 126kV with a 3150A continuous current and a 40kA short-circuit breaking capacity, it is built to switch and protect 110kV-class transmission and distribution networks where both dielectric strength and fault-interruption capability must be guaranteed at the same time.
Every core rating in this breaker is engineered to work as a matched set: the 3150A rated current covers heavily loaded feeders, the 40kA/3s short-time withstand keeps the equipment stable while protection relays clear downstream faults, and the high-speed operating mechanism restores the network in a matter of cycles. Manufactured in Zhejiang, China under an ISO9001-certified quality system, the LW36-126 is a dependable primary switching device for outdoor substations.
Key Features
Complete 126kV / 3150A / 40kA rating set
Rated voltage, continuous current, and breaking capacity are specified as a coordinated package, so the breaker can be selected directly from your single-line diagram without derating checks between parameters.
SF6 arc-extinguishing medium
Sulfur hexafluoride gas provides superior dielectric recovery after current zero, allowing clean interruption of 40kA fault currents with minimal contact wear.
Circuit-breaker failure and overcurrent protection functions
The breaker is designed to operate within breaker-failure protection schemes and overcurrent protection coordination, adding a layer of defense to substation protection logic.
High-speed operation
Classified as a high-speed circuit breaker, it minimizes fault clearing time and limits thermal and mechanical stress on adjacent equipment during short-circuit events.
Outdoor installation design
The 3-pole structure is engineered for open-air substation yards, with an outdoor-rated enclosure suitable for continuous exposure to sun, rain, and temperature swings.
ISO9001-2000 certified manufacturing
Production is controlled under an ISO9001-2000 quality management system, and customization plus OEM/ODM service are available for project-specific requirements.
Basic Info.
| Model NO. | LW36-126 |
| Arc-extinguishing Medium | SF6 |
| Poles Number | 3 |
| Function | Circuit-Breaker Failure Protection, Overcurent Protection |
| Product Name | Hv Sulfur Hexafluoride Circuit Breakers |
| MOQ | 1PCS |
| Customize | Yes |
| Rated Frequency | 52Hz |
| Rated Short-Circuit Breaking Current | 40ka |
| Transport Package | Wood Box |
| Trademark | HaiRui |
| Speed | High-Speed Circuit Breaker |
| nstallation | Outdoor Installation |
| Type | Circuit Breaker |
| Cetification | ISO9001-2000 |
| Service | OEM/ODM |
| Warranty | 12 Months |
| Rated Voltage | 126kv |
| Rated Current | 3150A |
| Rated Short-Time Withstand Current/Durat | 40/3ka/S |
| Specification | Custom |
| Origin | Zhejiang,China |
Packaging & Delivery
| Package Size | 1.00cm*1.00cm*1.00cm |
| Package Gross Weight | 1.000kg |
Applications
- 110kV-class outdoor substations as the primary circuit-breaker
- Transmission network switching and fault interruption duties
- Large industrial plants with in-house 126kV switchyards
- Power distribution hubs requiring 3150A continuous current capability
- Grid connection points for generation and renewable energy stations
Frequently Asked Questions
What are the main ratings of the LW36-126?
The LW36-126 is rated 126kV voltage, 3150A current, 40kA short-circuit breaking current, and 40kA/3s short-time withstand current, with a rated frequency of 52Hz as listed in the specification table.
Can this breaker be installed outdoors?
Yes. It is designed for outdoor installation in open-air substations, with construction suitable for continuous outdoor exposure.
Is customization or OEM/ODM service available?
Yes. Customization is supported and OEM/ODM service is offered, with specifications adaptable to project requirements. Minimum order quantity is one piece.
What protection functions does the breaker support?
It is specified for circuit-breaker failure protection and overcurrent protection applications, making it suitable for coordinated substation protection schemes.
How is the breaker packaged and what warranty applies?
Each unit is shipped in a wooden transport box from Zhejiang, China, and covered by a 12-month warranty under the HaiRui trademark.
Get a Quote
As an ISO9001-certified manufacturer based in Zhejiang, China, HaiRui supplies the LW36-126 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 are the main ratings of the LW36-126?
The LW36-126 is rated 126kV voltage, 3150A current, 40kA short-circuit breaking current, and 40kA/3s short-time withstand current, with a rated frequency of 52Hz as listed in the specification table.
Can this breaker be installed outdoors?
Yes. It is designed for outdoor installation in open-air substations, with construction suitable for continuous outdoor exposure.
Is customization or OEM/ODM service available?
Yes. Customization is supported and OEM/ODM service is offered, with specifications adaptable to project requirements. Minimum order quantity is one piece.
What protection functions does the breaker support?
It is specified for circuit-breaker failure protection and overcurrent protection applications, making it suitable for coordinated substation protection schemes.
How is the breaker packaged and what warranty applies?
Each unit is shipped in a wooden transport box from Zhejiang, China, and covered by a 12-month warranty under the HaiRui trademark.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
