LW8-40.5 Outdoor SF6 Circuit Breaker 3000-Operation Mechanical Life

Product Overview

The LW8-40.5 outdoor SF6 circuit breaker is rated for a 3000-operation mechanical lifespan, supporting long service intervals and low lifecycle maintenance cost in 40.5kV distribution applications. Rated at 1600A or 2000A with a spring operating mechanism, the breaker combines durable mechanical endurance with SF6 gas arc extinguishing for repeated switching duty. Circuit-breaker failure protection and overcurrent protection functions are integrated.

Key Features

• 3000-operation mechanical lifespan: The operating mechanism is rated for 3000 mechanical operations, extending the interval between mechanism overhauls and reducing lifecycle maintenance cost for frequently switched feeders.
• Spring operating mechanism: Spring-charged operation provides consistent contact travel throughout service life, with mechanically stored tripping energy for dependable fault clearing.
• 40.5kV rated voltage, 1600/2000A rated current: Two current ratings match different feeder loading levels on 40.5kV distribution networks, with 95kV power frequency withstand voltage.
• SF6 arc-extinguishing medium: SF6 gas provides efficient arc quenching with fast dielectric recovery, suited to repeated fault clearing and switching operations over the breaker’s service life.
• Circuit-breaker failure and overcurrent protection: Integrated protection functions support system security against breaker malfunction and overcurrent conditions.
• Outdoor medium-mounted configuration: Three-pole outdoor design for switchyard structures, with wood box transport packaging for delivery to site.
• 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.

Product Attributes

Applications

Suited to 40.5kV outdoor distribution substations and industrial power systems where switching frequency and maintenance access drive equipment selection. The 3000-operation rating benefits feeders requiring regular switching – for example, networks with load transfer operations or frequent protection trips. Buyers should confirm rated current (1600A or 2000A) and review switching frequency estimates against the mechanical endurance rating when planning maintenance schedules.

Frequently Asked Questions

What does the 3000-operation mechanical lifespan mean?

The operating mechanism is rated for 3000 mechanical operations – open-close cycles – before requiring overhaul. This endurance rating supports long maintenance intervals in distribution service.

How does mechanical life affect maintenance planning?

Maintenance intervals can be scheduled based on accumulated operation count. Feeders with frequent switching consume mechanical life faster; the 3000-operation rating provides headroom for such duty.

What is the difference between mechanical life and electrical life?

Mechanical life counts operations of the mechanism regardless of current interrupted; electrical life depends on fault current levels cleared. SF6 technology supports both, with the interrupter designed for repeated fault clearing duty.

What are the electrical ratings of this breaker?

Rated voltage is 40.5kV with 1600A or 2000A rated current options and 95kV power frequency withstand voltage. See the product attributes table for the complete rating list.

Is the breaker suitable for frequently switched feeders?

Yes. The combination of a 3000-operation mechanism rating and SF6 arc-extinguishing medium suits feeders with regular switching duty. Contact HaiRui with your switching frequency and load current for configuration advice.

Get a Quote

To request a quotation for the LW8-40.5 3000-operation mechanical life SF6 circuit breaker, contact HaiRui with your rated current requirement, switching frequency estimate, and order quantity.

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