Product Overview
High-load transmission circuits carry their power through the continuous current rating of the circuit breaker, and the LW36-126 carries it comfortably: a 3150A rated current at 126kV. For utilities and industrial users operating heavily loaded feeders, transformer incomers, or tie bays, this rating provides genuine headroom — power flows stay within design limits even at peak demand, without resorting to parallel breaker arrangements or early upgrades.
The 3150A capability is not achieved at the expense of fault performance. The breaker still delivers a 40kA short-circuit breaking capacity and 40kA/3s short-time withstand, with SF6 arc extinguishing and high-speed operation protecting the circuit when faults occur. The 3-pole outdoor construction, ISO9001-2000 certified manufacture, and available OEM/ODM customization make it a practical high-current choice for 110kV-class substations.
Key Features
3150A continuous current rating
Generous thermal capacity for heavily loaded transmission circuits, transformer incomers, and bus tie positions at the 126kV level.
Full fault capability alongside high current
The 40kA breaking capacity and 40kA/3s short-time withstand remain in force at the 3150A rating, so load capability never trades away protection.
SF6 arc-extinguishing medium
High dielectric strength gas quenches fault arcs quickly at every operation, protecting contacts and preserving long-term performance.
High-speed operating class
Fast fault clearance limits outage duration and equipment stress on high-load circuits where every minute of downtime is costly.
Outdoor 3-pole installation
The three-pole design installs in open-air substations and supports standard outdoor maintenance practice.
Flexible supply terms
Customization and OEM/ODM service are offered from an ISO9001-2000 certified factory, with a minimum order quantity of one piece and 12-month warranty.
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
- Heavily loaded 126kV transmission feeders
- Main transformer incomer bays in 110kV-class substations
- Bus tie and section switchgear positions
- Interconnection bays between substations or network areas
- High-load industrial infeed circuits requiring 3150A capability
Frequently Asked Questions
What is the rated current of the LW36-126?
The breaker is rated 3150A continuous current at a 126kV rated voltage, suitable for heavily loaded transmission and substation circuits.
Does the high current rating affect fault performance?
No. The breaker retains a 40kA short-circuit breaking current and 40kA/3s short-time withstand current alongside the 3150A continuous rating.
What medium does the breaker use for arc extinguishing?
It uses SF6 (sulfur hexafluoride) gas, which provides high dielectric strength and efficient arc quenching at high-speed operation.
Is the breaker for indoor or outdoor use?
It is specified for outdoor installation in a 3-pole configuration, suited to open-air substation yards.
Can it be customized for my project?
Yes. Customization is supported with OEM/ODM service, ISO9001-2000 certified manufacturing, 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 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 is the rated current of the LW36-126?
The breaker is rated 3150A continuous current at a 126kV rated voltage, suitable for heavily loaded transmission and substation circuits.
Does the high current rating affect fault performance?
No. The breaker retains a 40kA short-circuit breaking current and 40kA/3s short-time withstand current alongside the 3150A continuous rating.
What medium does the breaker use for arc extinguishing?
It uses SF6 (sulfur hexafluoride) gas, which provides high dielectric strength and efficient arc quenching at high-speed operation.
Is the breaker for indoor or outdoor use?
It is specified for outdoor installation in a 3-pole configuration, suited to open-air substation yards.
Can it be customized for my project?
Yes. Customization is supported with OEM/ODM service, ISO9001-2000 certified manufacturing, 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.
