Vacuum Circuit Breaker (VCB) Applications in Medium Voltage SwitchgearA Complete Guide to LS ELECTRIC Beyond X™ Susol VCB
- LS ELECTRIC
- Aug 19
- 4 min read
Introduction
As industries continue to expand and electrical loads become more demanding, reliable protection of medium voltage power systems has become essential. Vacuum Circuit Breakers (VCBs) have emerged as the preferred solution for medium voltage switchgear due to their exceptional performance, safety, long service life, and environmentally friendly operation.
The LS ELECTRIC Beyond X™ Susol Vacuum Circuit Breaker (VCB) is engineered to deliver superior interruption performance for critical electrical installations such as power plants, manufacturing industries, commercial buildings, data centers, and marine applications.
This article explores the applications, advantages, and key features of Susol VCB while comparing it with traditional SF₆ circuit breakers.
What is a Vacuum Circuit Breaker (VCB)?
A Vacuum Circuit Breaker (VCB) is a medium voltage circuit breaker that uses a vacuum interrupter to extinguish the electrical arc generated when interrupting current.
Unlike oil or SF₆ gas circuit breakers, VCBs operate inside a sealed vacuum chamber, making them:
Highly reliable
Maintenance-friendly
Environmentally safe
Extremely durable
Suitable for frequent switching operations
Vacuum interrupters provide rapid arc extinction because there are virtually no gas molecules available to sustain the electrical arc.
Why Choose LS ELECTRIC Beyond X™ Susol VCB?
The Beyond X™ Susol VCB is a premium medium voltage circuit breaker designed for high interrupting capacity and dependable performance.
Product Highlights
Voltage ratings up to 36kV
Interrupting capacity up to 50kA
Current ratings up to 5000A
Rated short-time withstand: 4 seconds
Operating sequence:
O – 0.3s – CO – 15s – CO
Compliant with IEC 62271-100 (M2, C2, E2)
Key Features of Susol VCB
High Interrupting Capacity
Designed to safely interrupt large fault currents, ensuring continuous protection of electrical networks.
Compact Design
The compact structure allows easier installation in new and retrofit switchgear panels.
High Compatibility
Available with:
Dual phase models
Various cradle types
Multiple accessories
This maximizes compatibility with existing switchgear systems.
Reliable Main Structure
The robust mechanical design delivers long operational life with minimal maintenance.
Wide Product Line-up
Suitable for various voltage and current requirements across industrial applications.
Applications of Vacuum Circuit Breakers
The Susol VCB is ideal for protecting critical electrical systems across numerous industries.
Manufacturing Industries
Protects:
Production lines
Motors
Industrial transformers
Heavy machinery
Reliable interruption minimizes downtime during electrical faults.
Power Plants
VCBs provide dependable protection for:
Generator feeders
Distribution systems
Auxiliary power circuits
Medium voltage substations
High interrupting capacity ensures safe fault isolation.
Commercial Buildings
Large commercial facilities require uninterrupted electrical service.
VCBs are commonly installed in:
Shopping malls
Corporate offices
Hospitals
Airports
Hotels
Data Centers
Modern data centers demand maximum uptime.
Susol VCB protects:
UPS systems
Power distribution units
Backup generators
Medium voltage feeders
Reliable operation helps prevent costly outages.
Marine and Shipbuilding
Large ships require dependable electrical distribution systems.
Susol VCB is designed for:
Marine switchboards
Offshore platforms
Ship power distribution
Its robust construction performs reliably in demanding environments.
Utility Substations
Medium voltage substations use VCBs for:
Incoming feeders
Outgoing feeders
Transformer protection
Distribution networks
Benefits of LS ELECTRIC Susol VCB
Enhanced Reliability
Designed for stable operation under demanding electrical conditions.
Low Maintenance
Vacuum interrupters experience very little contact wear, reducing maintenance costs.
Long Service Life
Capable of thousands of switching operations with consistent performance.
High Safety
Vacuum interruption eliminates oil leakage and reduces fire hazards.
Environmentally Friendly
No greenhouse gases are used during interruption.
Susol VCB Technical Specifications
Specification | Value |
Maximum Voltage | Up to 36kV |
Rated Current | Up to 5000A |
Breaking Capacity | Up to 50kA |
Short-Time Withstand | 4 seconds |
Operating Sequence | O–0.3s–CO–15s–CO |
Standard | IEC 62271-100 (M2, C2, E2) |
VCB vs SF₆ Circuit Breaker Comparison
Feature | Vacuum Circuit Breaker (VCB) | SF₆ Circuit Breaker |
Arc Quenching Medium | Vacuum | SF₆ Gas |
Environmental Impact | Eco-friendly | Uses greenhouse gas |
Maintenance | Low | Moderate |
Operating Life | Very Long | Long |
Fire Risk | Very Low | Very Low |
Installation | Compact | Larger in some configurations |
Switching Performance | Excellent | Excellent |
Operating Cost | Lower over lifecycle | Higher due to gas handling |
Gas Monitoring | Not Required | Required |
Environmental Compliance | Excellent | Increasing regulations on SF₆ use |
Why Industries are Moving Towards Vacuum Technology
Across the globe, industries are increasingly adopting vacuum circuit breakers due to:
Sustainability initiatives
Reduced maintenance costs
Higher reliability
Lower lifecycle cost
Environmental regulations restricting SF₆ usage
Vacuum technology offers an ideal balance between operational efficiency, safety, and environmental responsibility.
Why Choose LS ELECTRIC?
LS ELECTRIC has decades of expertise in power distribution and industrial automation. The Beyond X™ Susol VCB combines advanced engineering, international quality standards, and reliable protection for critical electrical infrastructure.
Whether your application involves industrial manufacturing, power generation, commercial buildings, or utility substations, Susol VCB delivers dependable medium voltage protection with long-term performance.
Conclusion
The LS ELECTRIC Beyond X™ Susol Vacuum Circuit Breaker is designed to meet the evolving demands of modern medium voltage distribution systems. With high interrupting capacity, compact design, excellent reliability, and compliance with IEC 62271-100 standards, it is an ideal solution for industries seeking safe, efficient, and environmentally responsible electrical protection.
As organizations continue to modernize their electrical infrastructure, investing in advanced vacuum circuit breaker technology ensures greater system reliability, lower maintenance costs, and improved operational safety.
Contact Us :
📞 080 61429108
Comments