LW16-40.5 Outdoor SF₆ Circuit Breaker | 40.5kV Medium Voltage Solution

Ensure uninterrupted outdoor power protection with the LW16-40.5 sulfur hexafluoride circuit breaker, specially engineered for 40.5kV medium voltage systems. Designed for long-term outdoor use, it delivers high reliability, low maintenance, and fast fault interruption—ideal for substations, mining sites, and industrial distribution.

🔧 Product Overview

The LW16-40.5 Outdoor SF₆ Circuit Breaker is a three-phase AC switchgear rated for 50Hz and 40.5kV, using sealed SF₆ gas insulation for superior dielectric strength and arc extinguishing. With a spring-operated CTB-1 mechanism, it ensures over 10,000 operations with low wear and high operational safety.

Key Advantage: This model employs a thermal expansion + gas-blast arc extinguishing mechanism, ensuring rapid contact separation and reduced arc damage.

📐 Technical Specifications

Parameter	Value
Rated Voltage	40.5 kV
Rated Current	1250 A / 1600 A / 2000 A
Rated Short-Circuit Breaking	25 / 31.5 kA
Frequency	50 Hz
SF₆ Gas Pressure (Rated)	0.45 MPa
Mechanical Life	≥ 10,000 operations
Insulation Medium	SF₆ gas
Installation Mode	Outdoor, pole-mountable

🌍 Application Scenarios

Medium voltage outdoor substations
Renewable energy (wind, solar) collection stations
Utility distribution and municipal networks
Mining and petrochemical industrial areas
Remote rural electrification zones

LW16-40.5 Outdoor SF₆ Circuit Breaker | 40.5kV Medium Voltage Solution

📊 Real-World Case Studies

✅ Power Grid Corporation of India (PGCIL)
In 2022, PGCIL upgraded multiple 132kV substations using LW-series outdoor SF₆ circuit breakers to replace aging oil units. These installations achieved:

35% faster fault clearance
Reduced maintenance frequency from 3 to 1 per year
Improved insulation stability during monsoon seasons

Source: PGCIL Annual Report 2022

✅ Codelco Copper Mine, Northern Chile
In 2021, Codelco deployed LW16-40.5 SF₆ breakers in desert-based 33kV substations. The units:

Ran 18 months with zero trip faults
Withstood high dust and wind loads with no degradation
Integrated smoothly with remote SCADA systems

Source: Codelco Technical Brief 2022

🛠 Installation Instructions

Fix breaker to concrete base or metal structure.
Connect busbars and conductors with standard terminals.
Inspect SF₆ gas density and perform pre-test calibration.
Wire the CTB-1 mechanism and test remote control functions.
Conduct mechanical open/close cycles and current injection testing before energizing.

❓ Frequently Asked Questions (FAQ)

1. What’s the difference between LW16-40.5 and vacuum circuit breakers?
The LW16-40.5 uses SF₆ gas, which offers higher insulation and arc-extinguishing capability for outdoor use compared to vacuum-based units.

2. Can it be used in coastal or desert environments?
Yes. The hermetically sealed design ensures stable performance in humid, dusty, or salty air conditions.

3. Is SF₆ refilling needed periodically?
No. The unit is factory-sealed. A gas density monitor alerts for rare pressure loss.

4. Is it compatible with protection relays like ABB REF615 or Schneider P139?
Yes. It supports IEC-based relay schemes for overcurrent, distance, and recloser logic.

5. Can this breaker be controlled remotely?
Absolutely. With the CTB-1 mechanism and proper wiring, it integrates into SCADA or RTU platforms.