SWR Retrofit

SWR retrofit

The SWR12 is an OEM designed retrofit circuit breaker for both the South Wales Switchgear C & D range Oil Circuit Breaker and the HG12 Gas Circuit Breaker, to IEC 62271-100. BRUSH Switchgear is proud of its heritage in the C and D range of switchgear, which continue to work at the highest standards. Technological advances have allowed us to improve further and offer our customers a circuit breaker that boasts the award-winning magnetic actuator along with removing the need for SF6 gas. The SWR12 circuit breaker, offers a new lease of life for existing switchgear, with this effective retrofit solution. Employing magnetic actuator technology with vacuum interrupters, the SWR12 is designed for 10,000 operations and a life expectancy of 30 years. It is designed for retrofitting into existing switchboards without the need for panel modification.


SWR Retrofit Datasheet

2 Pole datasheet

  • Superior, proven technology with minimal maintenance
  • No civil works required and existing HV cabling remains undisturbed
  • Improvement of Health & Safety by removal of Oil or SF6 gas
  • 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
  • Improved panel interlocking to latest ENA requirements
  • In addition to the retrofit of the circuit breaker, BRUSH Switchgear can offer a more complete system solution to enhance the control and automation of the distribution network
Rated Voltage kV 12
Normal Rated Currents A 400/630, 800, 1250
Lightning Impulse Withstand Voltage kVP 75
Short Duration Power Frequency Withstand Voltage kV 28
Rated Frequency Hz 50
Rated Short-Time Withstand Current kA 25 for 3 seconds
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 Auxiliary Voltages V dc 30, 48/50, 110/125
Minimum opening time/closing time ms 33/76
Normal Operations   10,000
Weight Kg 211
Rated Operating Sequence   O-0.3s-CO-15s-Co
Operating Mechanism Type Dependent power closing (Magnetic actuator)

Stored energy opening

(Springs, charging for closing)


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