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40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications
40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications
40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications
40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications
40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications
40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications 40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications

40.5kV SF6 Vacuum Circuit Breaker with Spring Mechanism for Industrial Applications

US$ 900.00 ~ 2500.00
Min.Order: 1
Product origin: Wenzhou, Zhejiang, China
Category: Electrical Equipment & Supplies
Product Name: Electrical Equipment & Supplies
Availability:In Stock
Product Review : 9 Reviews
Infringement complaint:
* Please contact the supplier via whatsapp first before placing an order
  • Model Number : LW8-40.5
  • Rated Voltage : 40.5kV
  • Rated Frequency : 50Hz
  • Rated Current : 1600A/2000A
  • Rated Short-circuit Breaking Current : 25kA/31.5kA
  • Mechanical Life : 3000 operations
  • SF6 Gas Rated Pressure : 0.50MPa (20°C)
  • Alarm Pressure : 0.47MPa
  • Minimum Functional Pressure : 0.45MPa
  • Rated Short-time Withstand Current : 25kA/31.5kA
  • Closing Time : ≤0.1s
  • Opening Time : ≤0.06s
  • SF6 Gas Weight : 8kg
  • Circuit Breaker Weight : 1400kg
  • Installation Type : Outdoor
  • Poles : 3
  • Arc-extinguishing Medium : SF6 Vacuum
  • Operation Mechanism : CT14 Spring
  • Certifications : ISO9001, CE, CCC

So you're dealing with 40.5kV distribution and need something that won't quit on you in the middle of a shift — we've shipped hundreds of the LW8-40.5 for exactly that reason, and it's built around a CT14 spring mechanism that snaps closed in under a tenth of a second.

LW8-40.5 Outdoor Circuit Breaker

It runs on 50Hz, rated current at 1600A or 2000A depending on your bus, and the short-circuit breaking current hits 25kA or 31.5kA — that's good for a 4-second withstand, which is pretty much standerd for indutrial switchgear in this class.

Circuit Breaker Components

60 millisecond opening time means it clears faults fast, and SF6 gas sits at 0.50MPa at 20°C with an alarm at 0.47MPa — you'll get about 3000 mechanicla operations before anything wears out, though we usually see customers ordering spares around the 2500 mark.

Circuit Breaker Installation

Most buyers go with the floor tank version for outdoor installs, but we can do porcelain pillar if your footprint is tight — just know teh gas weight is 8kg and total unit weight is around 1400kg, so you'll want a crane on-site. OEM requests are fine, but we typically need a minimum of 10 units for custom paint or terminal configs.

Circuit Breaker Mechanism

Lead time is roughly 30-35 working days for a standard batch (usually 10 units or so), and we ship with COA and CE docs — just confirm the SF6 presure spec before ordering, because the alarm threshold at 0.47MPa is a hard limit for most inspectors. We don't recommend using it below 0.45MPa minimum functional pressure, but that's a pretty rare edge case anyway.

Frequently Asked Questions

What is the minimum order quantity for the LW8-40.5 circuit breaker?

Our MOQ for this model is 1 unit, but we can discuss larger volumes if you need a bulk order.

What is your typical lead time for the LW8-40.5?

Lead time is usually 30-45 days from order confirmation, depending on current production load and customization needs.

Do you provide certification documents like ISO9001, CE, and CCC with the shipment?

Yes, we include copies of ISO9001, CE, and CCC certificates with every shipment. Let us know if you need originals or notarized versions.

Can you clarify the difference between the 1600A and 2000A rated current options?

The 1600A version handles a maximum continuous current of 1600 amps, while the 2000A version goes up to 2000 amps. Both have the same breaking capacity of 25kA or 31.5kA, so choose based on your load requirements.

How should the LW8-40.5 be stored before installation, and does it come pre-charged with SF6 gas?

Store it in a dry, sheltered area away from direct sunlight and moisture. The unit comes pre-charged with SF6 gas at 0.50MPa, so just check the pressure gauge before installation.

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