The BSR is an OEM designed retrofit circuit breaker for both the Brush Switchgear VSI range of Oil Circuit Breakers and the VMV vacuum Circuit Breaker, to IEC 62271-100.

Employing magnetic actuator technology with vacuum interrupters, the BSR is designed for 10,000 operations and a life expectancy of 30 years. It is designed for retrofitting into existing switchboards with minimal panel modification.

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  • Superior, proven 'Fit & Forget' technology with minimal maintenance
  • Remove the need for high capacity auxiliary supplies
  • No civil works required and existing HV cabling remains undisturbed
  • Improvement of Health & Safety by removal of Oil
  • Considerable life extension of the existing switchgear
  • Lower owner costs through virtually no maintenance requirements and increased switchboard life expectancy
  • Uses existing design of primary and automatic secondary contacts
  • In addition to the retrofit of the circuit breaker Hawker Siddeley Switchgear can offer a complete system solution to enhance the control and automation of the distribution network


 Normal Rated Current A 630, 1250, 2000
 Rated Voltage kV 12
 Lightning Impulse Withstand Voltage kVP 75/95
 Short Duration Power Frequency Withstand Voltage kV 28
 Rated Frequency Hz 50
 Rated Short-Time Withstand Current kA 25
 Rated Peak Withstand Current kA Peak 62.5
 Rated Duration of Short Circuit Seconds 3
 Making Current (peak) kA 62.5
 Symmetrical Breaking Current kA 25
 Rated Short-Time Current (3 sec) kA 25
 Rated Auxiliary Voltages V dc 30, 48/50, 110/125
 Minimum opening time/closing time ms 33ms/76ms
 Normal Operations   10,000
 Weight Kg 211



The BSR has a wide range of applications:

  • Primary distribution
  • Secondary Substation
  • Utilities
  • Transport
  • Building Services
  • Light Industrial
  • Commercial
  • Education
  • Hospitals
  • MOD

get in touch

Contact HSS

+44 (0)1495 223001

+44 (0)1495 223001

+ 61 7 3888 2333

what we've done

case studies

ENWL Case study Wilmslow retrofit ENWL approved

SSEN - Horizon Framework