Medium Voltage Soft Starter Brochure


Medium Voltage Soft Starter


  • Advanced motor protection relay and ramp features programmable via the keypad or a laptop computer
  • Fiber optically isolated low voltage compartment with up to 110kV BIL rating for safety and reliability
  • Built-in 120V control power transformer*; voltage and current metering.
  • Load-break / fault-make rated disconnect switch with door safety interlocking.*
  • Visible grounding bar for safe operation.
  • Coordinated motor fuses with blown fuse indicators.
  • Line isolation vacuum contactor
  • Fully rated bypass contactor for increased thermal capacity and optional across-the-line starting.
  • Heavy duty SCR stack assemblies with ring transformer isolation for reliable SCR gate firing.
  • RTD Option accepts up to 12 RTD inputs.
  • Zero sequence ground fault protection option.
  • Top entry, bottom exit with room for stress cones. Removable entry plates for easy connections.
  • NEMA 12 gasketed enclosure (NEMA 3R optional).
Keywords: SR7-H, 2.3-15kV, Soft, Starter