CO7 Technologies VSB indoor and outdoor vacuum air insulated substation circuit breakers combine the proven medium voltage circuit breaker technology from Schneider Electric with our industry-leading design. Engineered and built in our manufacturing facility in Montreal (QC), Canada, the VSB Station Breaker meets or exceeds relevant IEEE/ANSI standards for indoor and outdoor circuit breakers and features arc-resistant type 2B construction on the 1200 – 2500A models.  

Standards features  

  • Type FK2 operating mechanism  
  • Trip and close coil 
  • Visual circuit breaker status window 
  • Operation counter 
  • Mechanical position indicator 
  • External manual trio handle 
  • Necessary terminal and wairing 
  • Fused knife-switch control voltage disconnect 
  • Porcelain dry-type roof bushings 
  • Bolted-welded cabinet construction 
  • Permanent lifting eyes (4)
  • Adjustable galvanized legs (4)
  • Corrosion-resistant power
  • Cabinet heaters to prevent condensation
  • Additional heaters for -50ºC
  • Filtered ventilation
  • CSA rain-tested design
  • Reduced footprint
  • Internal arc type 2B as per IEEE C37.20.7 (12,5kA @1s, [email protected], [email protected])
  • Capacitive current switching tests C2 (600A)

Technical Characteristics

Rated Voltage
Up to 29.8kV
Power frequency withstand Voltage
60 kVrms
Lightning Impulse leve
Short-circuit interrupting current (sym.)
12.5kA, 25kA, 31.5kA
DC component (asymmetry)
45ms, 75ms
Short-circuit time withstand current (1s)
25kA, 31,5kA
Nominal Current
1200A, 2000A, 2500A
Operating Temperatures
50 to 40⁰C
Standard operating duty
Maximum interrupting time
3.5 cycles
1000 m


The VSB meets the following standards:

  • IEC 62771-100: High-voltage switchgear and controlgear- Part 100: alternating-current circuit-breaker
  • IEC 62271-1: High-voltage switchgear and controlgear- Part 1: Common specifications
  • IEEE C37.20.7: Guide for testing metal-Enclosed Switchgear rated Up to 38 kV for Internal Arcing Faults
  • CSA C22.2 NO 94 : special-purpose enclosures industrial products
  • IEEE C37.082: Standard Methods for the Measurement of Sound Pressure Levels of AC Power Circuit Breakers


When specified, the VSB Station Breaker can maintain structural intergrity during and after a seisimic disturbance, as per IEEE 693 and TET-APG-N-0001-2013 (Hydro-Quebec).

Optional equipment and custom solutions

  • Terminal connectors for bushings 
  • Special Current transformers class 
  • Second trip coil 
  • Undervoltage trip device 
  • Seismic capability (IEEE 693 high level) 
  • Polymer bushings