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Switches & Disconnects - Load Interrupter Switches
Medium Voltage LIS Retrofit
Industrial Solutions

Medium Voltage LIS Retrofit

ABB's Medium Voltage LIS Retrofit solution provides reduced Arc Flash incident energy levels for customers on their existing MV equipment.


With modifications, ABB can also provide retrofits to other manufacturer's Load Interrupter Switches.


Features and Benefits

  • Reduced Arc Flash levels from the transformer down to the LV system
  • Transformer protection via the latest relay technology (bus and transformer differential protection)
  • Added transformer protection via an optional snubber application
  • Relay options that provide upstream and/or downstream communications
  • Retrofitting into your existing LIS enclosure
  • Minimal downtime for installation and commissioning (approx. 8-12 hours)
  • A separate low voltage door to permit access for breaker operation without the need to open the high voltage compartment


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