Joslyn Hi-Voltage Electric Arc Furnace Switches
ABB engineers worked closely with electric arc furnace manufacturers to develop the Joslyn Hi-Voltage Transmaster VBT electric arc furnace switch, a heavy-duty vacuum switch designed to deliver maintenance free switching of electric furnaces.
- Long life product for electric furnaces
- Long, maintenance-free life under demanding conditions, designed for 100,000 operations
- No oil or gas used for interruption or insulation
- Safe – no visible or hazardous arcing and no hot exhaust or ionized gas dissemination
- Vacuum interrupter condition can be determined by a high-potential withstand test quickly
- Lightweight modular design – no special foundations or costly support required
- Removable fuses provide protection
- Vacuum contacts withstand excessive overloads and system short circuits at any power factor
Reduces stress on all other components of
the furnace and reduces maintenance costs.