12kV VS1 Indoor Vacuum Circuit Breakers Supplied to Vietnam Cement Plant
Project Name: Long Son Cement Plant Expansion – Electrical Room Upgrade
Country: Vietnam
Product: VS1-12 Indoor Vacuum Circuit Breaker (Withdrawable type)
Quantity: 26 units
Client: EPC contractor for Long Son Cement, Thanh Hoa Province
Delivery Time: April 2025
Application: Medium voltage feeder panel retrofit
Project Overview:
QZ Switchgear supplied 26 sets of VS1 vacuum circuit breakers (VCB) for installation in KYN28-12 switchgear panels as part of a power system upgrade at a large cement plant. The VS1 units replaced aging SF6 interrupters and were selected for their mechanical durability and ease of integration.
Technical Highlights:
Rated Voltage: 12kV | Rated Current: 1250A | Breaking Capacity: 25kA
Spring-operated mechanism, suitable for frequent switching
Electrical & mechanical interlock fully compatible with KYN28 panels
IEC62271-100 & TCVN (Vietnam Standard) certified
Client Benefits:
20,000 operation lifespan reduces long-term maintenance
Factory pre-tested breakers shortened onsite commissioning
Full documentation support in English and Vietnamese
