Product Overview
The LW8-40.5 is an outdoor high-voltage circuit breaker that uses sulfur hexafluoride (SF6) gas for both insulation and arc extinguishing. Rated at 40.5kV with a choice of 1600A or 2000A rated current, its medium-mounted outdoor configuration is designed for substations and distribution networks. A spring operating mechanism provides high-speed switching, and the breaker integrates circuit-breaker failure protection and overcurrent protection functions for system security.
Key Features
- SF6 gas insulation and arc extinguishing: Sulfur hexafluoride gas serves as both the insulating medium and the arc-extinguishing medium, enabling a compact outdoor design with reliable dielectric performance at 40.5kV.
- 40.5kV rated voltage: Engineered for high-voltage distribution networks, with a 95kV power frequency withstand voltage supporting insulation requirements in outdoor substations.
- 1600A / 2000A rated current options: Two rated current options cover different feeder load levels, allowing selection to match the continuous load current of the installation.
- Spring operating mechanism: The spring-charged mechanism delivers consistent high-speed contact operation, with tripping energy stored mechanically rather than depending on auxiliary power at the moment of fault clearing.
- Circuit-breaker failure and overcurrent protection: Integrated protection functions guard against breaker malfunction and overload conditions, improving overall system security.
- 3-pole outdoor configuration: Three-pole design for three-phase switching in medium-mounted outdoor installations, rated for 3000 mechanical operations.
- ISO9001-2000 certified with OEM/ODM support: Manufactured under ISO9001-2000 quality management with a 12-month warranty, MOQ of 1 piece, and customization available from the factory in Zhejiang, China.
Product Attributes
| Customization | Available |
| Breaking Capacity | High Voltage Circuit Breakers |
| Operation | Spring Operating Mechanism |
| Model NO. | LW8-40.5 |
| Speed | High-Speed Circuit Breaker |
| Arc-extinguishing Medium | SF6 |
| Installaton | Outdoor Installation |
| Poles Number | 3 |
| Type | Circuit Breaker |
| Function | Circuit-Breaker Failure Protection, Overcurrent Protection |
| Certification | ISO9001-2000 |
| Product Name | Hv Sulfur Hexafluoride Circuit Breakers |
| Service | OEM/ODM |
| MOQ | 1PCS |
| Warranty | 12 Months |
| Customize | Yes |
| Rated Voltage | 40.5kv |
| Lightning Impulse Withstand Voltage | 40.5kv |
| Power Frequency Withstand Voltage | 95kv |
| Rated Current | 1600/2000A |
| Mechanical Lifespan | 3000time |
| Rated Gas Pressure of Sulfur Hexafluorid | 0.5MPa |
| Alarm Pressure | 0.47MPa |
| Minimum Functional Pressure | 0.15MPa |
| Transport Package | Wood Box |
| Specification | Custom |
| Trademark | HaiRui |
| Origin | Zhejiang,China |
| Package Size | 1.00cm*1.00cm*1.00cm |
| Package Gross Weight | 1.000kg |
Applications
Suitable for 40.5kV outdoor substations, distribution substations, and industrial power systems requiring SF6 gas insulated switching. The medium-mounted configuration suits installations where the breaker is mounted on a support structure in outdoor switchyards. Buyers should confirm the required rated current (1600A or 2000A), system voltage, and protection scheme compatibility before ordering.
Frequently Asked Questions
What does SF6 gas insulated mean for this circuit breaker?
SF6 (sulfur hexafluoride) gas serves as both the insulation medium inside the interrupter and the arc-extinguishing medium during breaking. Its high dielectric strength allows a compact outdoor design with reliable switching performance at 40.5kV.
What are the rated current options?
The LW8-40.5 is available with 1600A or 2000A rated current. Select the rating based on the continuous load current of the feeder or busbar where the breaker will be installed.
What protection functions does the breaker provide?
The breaker provides circuit-breaker failure protection and overcurrent protection functions, supporting system security against breaker malfunction and overload or fault conditions.
What type of operating mechanism is used?
A spring operating mechanism is used. It provides high-speed operation with mechanically stored tripping energy, ensuring reliable fault clearing independent of the auxiliary power supply state.
Is customization available?
Yes. The breaker is supplied with OEM/ODM service support, ISO9001-2000 certification, a 12-month warranty, and a minimum order quantity of 1 piece. Contact the manufacturer with your specifications for a tailored configuration.
Get a Quote
To request a quotation for the LW8-40.5 SF6 gas insulated circuit breaker, contact HaiRui with your rated voltage, current requirement, installation details, and order quantity.
FAQ
What does SF6 gas insulated mean for this circuit breaker?
SF6 (sulfur hexafluoride) gas serves as both the insulation medium inside the interrupter and the arc-extinguishing medium during breaking. Its high dielectric strength allows a compact outdoor design with reliable switching performance at 40.5kV.
What are the rated current options?
The LW8-40.5 is available with 1600A or 2000A rated current. Select the rating based on the continuous load current of the feeder or busbar where the breaker will be installed.
What protection functions does the breaker provide?
The breaker provides circuit-breaker failure protection and overcurrent protection functions, supporting system security against breaker malfunction and overload or fault conditions.
What type of operating mechanism is used?
A spring operating mechanism is used. It provides high-speed operation with mechanically stored tripping energy, ensuring reliable fault clearing independent of the auxiliary power supply state.
Is customization available?
Yes. The breaker is supplied with OEM/ODM service support, ISO9001-2000 certification, a 12-month warranty, and a minimum order quantity of 1 piece. Contact the manufacturer with your specifications for a tailored configuration.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
